Low dT, pump control and why DP reset ma...

Low ΔT in a chilled water system is often misunderstoo...

View More

ASNZS 5149 Refrigerant Charge Limit Calc...

Use this AS/NZS 5149 refrigerant charge limit calculator to ...

View More

Constant Airflow Regulator

View More

Indoor pool and wellness centre

Use this indoor pool and wellness centre calculator to estim...

View More

What do you want from your BMS 1/3

Fresh out of uni back in the days, sitting on some cement ba...

View More

AS 1668.4 Natural Ventilation Opening Ar...

Use this calculator to estimate minimum natural ventilation ...

View More

Comparison of UVC, UVC LED and Far-UVC f...

For AHU cooling coil disinfection, conventional 254 nm UVC m...

View More

Average Person Sensible and Latent Heat ...

Use this calculator to estimate the sensible and latent heat...

View More

Carpark exhaust control

View More

Solar PV Air Conditioner Sizing

Use this calculator to calculate how many solar panels are r...

View More

The Phenomenon of Condensation

We’ve seen that to vaporise R22, that is, to change it...

View More

Room Pressurisation Leakage and Fan Airf...

Use this calculator to estimate the airflow required to main...

View More

ASNZS 60079.10 Hazardous Area Ventilatio...

Use this to calculate hazardous atmosphere ventilation rate ...

View More

HVAC Duct Sizing Calculator

Use this calculator to calculate HVAC duct sizes using equal...

View More

Fire rated sealants

Fire-rated sealants are required where services, pipes, duct...

View More

Relative Pressure and Absolute Pressure

Relative Pressure and Absolute PressureThe deeper divers go ...

View More

Chiller Sizing Calculator

Use this chiller sizing calculator to estimate key HVAC chil...

View More

The Role of the Compressor

Think back to the hot heat exchanger and the black grille be...

View More

What Happens When All AHU Dampers Are Cl...

A serious design problem occurs when all available airflow p...

View More

Is water boiling point always at 100C

Is Water Boiling Point always at 100°CThe temperature of...

View More

What do you want from your BMS 2/3

Before I answer the question, let’s look at the diagra...

View More

Mould growth provisions for NCC 2022

Mould Growth Provisions for NCC 2022First published in Linke...

View More

Split System Air Conditioners Installati...

The split system air conditioner has two parts: the indoor a...

View More

AS 1668.2 2012 Car Park Exhaust Calculat...

Use this calculator to calculate the minimum exhaust airflow...

View More

AS 1668.4 Natural Ventilation Opening Ar...

Use this calculator to estimate minimum natural ventilation ...

View More

Predictive Maintenance and Condition Mon...

So, what is predictive maintenance? How do you use condition...

View More

How reciprocating compressors work in ai...

The reciprocating compressors (piston compressors or recip c...

View More

Evaporative cooler sizing

Use this evaporative cooler sizing calculator to estimate th...

View More

What Happens in the Cold Heat Exchanger

Remember that R22 refrigerant vaporises at -42°C at atmo...

View More

Henrys Law and Cavitation

Henry's Law and cavitationEver wondered why a perfectly ...

View More

Split System Air Conditioners Installati...

The split system air conditioner has two parts: the indoor a...

View More

What is Boiling

The first step to understanding how the air conditioning ref...

View More

AS 1668.2 2012 Car Park Exhaust Calculat...

Use this calculator to calculate the minimum exhaust airflow...

View More

Small in Window Air Conditioner Units In...

As its name suggests, unitary window air conditioners consis...

View More

Chiller System Designs Mistakes

Chilled water systems can become inefficient, unstable or ex...

View More

Why Your High Efficient Condensing Boile...

Now that you have installed the high-efficiency condensing b...

View More

Comparison with P, PI & PID

View More

How Do Air Conditioners Work

The principal role of air conditioning is to maintain a comf...

View More

Plate Heat Exchanger Sizing Calculator

Use this liquid plate heat exchanger sizing calculator to es...

View More

Why is my class room stale!

Those were the days my chief engineer checked all my designs...

View More

Ground Source Heat Pump Size Estimator

Use this ground source heat pump size estimator to assess pr...

View More

How to verify the percentage of outside ...

Use this outside air percentage calculator to estimate how m...

View More

Natural Ventilation Requirements in Aust...

Natural ventilation is one of the simplest ways to provide o...

View More

Water Cooled Chiller Sizing Calculator

Use this water-cooled chiller sizing calculator to estimate ...

View More

The Role of the Compressor

Think back to the hot heat exchanger and the black grille be...

View More

Filters energy use

Filter True Cost CalculatorThe Filter True Cost Calculator i...

View More

Duct Heat Gain and R-Value Insulation Ca...

Use this calculator to estimate duct heat gain as a percenta...

View More

Carpark exhaust control

View More

Legacy AHU Supply air fan speed control ...

Legacy Supply Air Fan Speed Control, A Smarter Way to Save E...

View More

So What is New in Refrigerant?

From CFCs to HFOs, how Refrigerant Policy Evolved from Ozone...

View More

Solar Absorption Chiller Sizing Calculat...

Use this calculator to estimate solar collector area, storag...

View More

Far Ultraviolet Germicidal Irradiation (...

Far-UVC Ultraviolet Germicidal Irradiation (UVGI)What do you...

View More

Solar Air Conditioning

Solar energy has always been attractive to the building serv...

View More

Henrys Law and Cavitation

Henry's Law and cavitationEver wondered why a perfectly ...

View More

What is Condenser in Air Conditioning Sy...

The air-cooled condenser is a heat exchanger. What is the fu...

View More

Water use by cooling towers

Use this cooling tower water use calculator to estimate the ...

View More

The Role of the Expansion Device (TXV an...

In the instance of a bicycle pump experiment, you will notic...

View More

Relationship Between Pressure and Temper...

Relationship between Pressure and Temperature If you lo...

View More

Average Person Sensible and Latent Heat ...

Use this calculator to estimate the sensible and latent heat...

View More

Preliminary Cooling Load Estimation

Use this preliminary cooling load estimator to calculate an ...

View More

Correct installation of expansion vessel

Expansion vessels are often treated as simple pipework acces...

View More

The Role of the Compressor

Think back to the hot heat exchanger and the black grille be...

View More

Why Your High Efficient Condensing Boile...

Now that you have installed the high-efficiency condensing b...

View More

Properties of air-psychrometry

Air is the medium with which buildings are cooled and heated...

View More

Evaporative cooler sizing

Use this evaporative cooler sizing calculator to estimate th...

View More

How Do Air Conditioners Work

The principal role of air conditioning is to maintain a comf...

View More

Gas Detectors-Ammonia Refrigerant

View More

What is Thermal Expansion Valve (TX Valv...

All air conditioning refrigeration circuits have expansion d...

View More

Indirect Evaporative Cooling-The Univers...

In 2011, we were tasked to resolve the HVAC system design fo...

View More

What is P, PI & PID controls

  An open loop system operates without feedback, i...

View More

Mould growth provisions for NCC 2022

Mould Growth Provisions for NCC 2022First published in Linke...

View More

Air Cooled Chiller Sizing Calculator

Use this air cooled chiller sizing calculator to estimate co...

View More

Generator Room Ventilations

Use this generator room ventilation calculator to estimate t...

View More

Refrigerant Pipe Sizings

Refrigerant pipe sizingsSuction line velocity: 4.5m/s to max...

View More

The Role of the Expansion Device (TXV an...

In the instance of a bicycle pump experiment, you will notic...

View More

Infrared heating

When you walk into a warehouse or sports arena with high-bay...

View More

Commercial Kitchen Ventilation Designs

Commercial Kitchen Ventilation DesignsAmong the frequent que...

View More

ERV energy recovery calculator

Use this HVAC air-to-air heat exchanger and ERV calculator t...

View More

Air Purifiers, Hepa Filters, or Air Filt...

View More

What is Refrigeration and Air Conditioni...

Are you looking to learn and take an air conditioning course...

View More

ASNZS 60079.10 Hazardous Area Ventilatio...

Use this to calculate hazardous atmosphere ventilation rate ...

View More

Chiller System Designs Checklist

Before finalising the chiller selection, review the followin...

View More

The Refrigeration Gauges

Let’s examine the refrigeration pressure gauge: this i...

View More

Lubricant Related Compressor Failures

If you strip away all the marketing noise around lubricants,...

View More

Air and human comfort

Space explorations to the moon, other planets, and beyond ha...

View More

Room Noise Predictor From AHU to Diffuse...

Use this room noise predictor to estimate the expected noise...

View More

Engineering innovation, is creativity th...

Engineering is often seen as a discipline of rules, standard...

View More

AS1668.2 2012 Appendix A Minimum OA

Use this AS 1668.2 outdoor air ventilation rate look up tool...

View More

How to size buffer tank

Buffer tank sizing is not an arbitrary exercise. Typical gui...

View More

Transfer Duct Sizing Calculator

Use this calculator to estimate the total pressure drop acro...

View More

Thermal Insulation R-Value and U-Value C...

Use this calculator to calculate R-value and U-value from in...

View More

What is Condenser in Air Conditioning Sy...

The air-cooled condenser is a heat exchanger. What is the fu...

View More

Chiller Sizing Example

This worked example shows how to size a chiller for a commer...

View More

Legacy AHU Supply air fan speed control ...

Legacy Supply Air Fan Speed Control, A Smarter Way to Save E...

View More

Carpark exhaust control

View More

How a chiller controls its capacity and ...

A chiller controls its capacity mainly by maintaining the le...

View More

Psychrometric calculator

Use this free HVAC Psychrometric Calculator to calculate moi...

View More

AS 1668.2 Mechanical Exhaust Ventilation...

Use this AS 1668.2 mechanical exhaust ventilation rate look-...

View More

What is Coanda Effect

What is coanda effect?    How does coand...

View More

Refrigerant R22

Before we get ahead of ourselves, R22 will phase out in Aust...

View More

The Physiological Basis for Air Conditio...

Seasonal extremes of heat and cold are often outside the ran...

View More

Why Your High Efficient Condensing Boile...

Now that you have installed the high-efficiency condensing b...

View More

Aged Care Homes Comfort Envelope

Comfort in aged care homes is not just about setting the the...

View More

Filters energy use

Filter True Cost CalculatorThe Filter True Cost Calculator i...

View More

What is an Air Conditioner Evaporator Co...

The evaporator is a heat exchanger that operates on the same...

View More

Emergency Warning and Intercommunication...

View More

Why Condenser Coil Fins Flaking and Fall...

When condenser fins become brittle, flake and fall apart whe...

View More

Chiller Sizing FAQs

This chiller sizing FAQ answers common questions about selec...

View More

Natural Ventilation Designs

 https://www.monodraught.com/https://greenhome.osu.edu/...

View More

Preliminary Cooling Load Estimation

Use this preliminary cooling load estimator to calculate an ...

View More

Why is my class room stale!

Those were the days my chief engineer checked all my designs...

View More

HVAC calculators and Estimators

Free HVAC calculators and estimators for cooling, heating, a...

View More

Transfer Duct Sizing Calculator

Use this calculator to estimate the total pressure drop acro...

View More

AS 1668.2 Kitchen Exhaust Calculator

Use this AS 1668.2 kitchen exhaust calculator to estimate mi...

View More

How to calculate room pressurisation

Use this room pressurisation calculator to estimate the airf...

View More

Solar Absorption Chiller Sizing Calculat...

Use this calculator to estimate solar collector area, storag...

View More

Dehumidification load in swimming pool

Use this swimming pool dehumidification load calculator to e...

View More

AS 1668.2 bathroom and toilet exhaust ve...

Use this AS 1668.2 bathroom and toilet exhaust ventilation c...

View More

Refrigeration Cycles

As its name indicates, it’s in the evaporator that the...

View More

Air conditioning back to basic principle...

Air conditioning basic principlesThe basis for air condition...

View More

Cost Saving Electronically Commutated (E...

One of the common reasons to adopt electronically commutated...

View More

Filters energy use

Filter True Cost CalculatorThe Filter True Cost Calculator i...

View More

Solar Absorption Chiller Sizing Calculat...

Use this calculator to estimate solar collector area, storag...

View More

The Phenomenon of Condensation

We’ve seen that to vaporise R22, that is, to change it...

View More

Emergency Warning and Intercommunication...

View More

Preliminary Cooling Load Estimation

Use this preliminary cooling load estimator to calculate an ...

View More

What consultants must learn from Lacross...

Disclaimer: The below is provided for general information an...

View More

Far Ultraviolet Germicidal Irradiation (...

Far-UVC Ultraviolet Germicidal Irradiation (UVGI)What do you...

View More

HVAC Sheet Metal Zinc Coating

Zinc coating selection is critical for HVAC sheet metal dura...

View More

Correct installation of expansion vessel

Expansion vessels are often treated as simple pipework acces...

View More

Evaporative cooler sizing

Use this evaporative cooler sizing calculator to estimate th...

View More

Aged Care Homes Comfort Envelope

Comfort in aged care homes is not just about setting the the...

View More

Safety-in-designs

Safety in design is not only about whether the HVAC system w...

View More

Evaporative Condenser Access and Mainten...

Providing safety access platforms for evaporative condensers...

View More

Stair pressurisation system

Stair pressurisation systemDoor average area: 2.1m2Design nu...

View More

Conflict of Air Tightness Buildings and ...

Conflict of Air Tightness Buildings and Fire SafetyModern bu...

View More

Natural Ventilation Design Mistakes

Natural ventilation can reduce mechanical cooling and fan en...

View More

Stair Pressurisation Calculator

This stair pressurisation calculator estimates the prelimina...

View More

Why Every Installed Power Meter Should C...

A local power meter only shows what is happening at the exac...

View More

NCC2025 Part J6D9 Pipework insulation

Updated to NCC 2025(1) Piping, vessels, heat exchangers and ...

View More

Infrared heating

When you walk into a warehouse or sports arena with high-bay...

View More

Predictive Maintenance and Condition Mon...

So, what is predictive maintenance? How do you use condition...

View More

How to Size a Chiller

Sizing a chiller is more than selecting a machine with the s...

View More

AS 1668.2 Minimum Outdoor Airflow Rate C...

Use this AS 1668.2 Minimum Outdoor Airflow Rate Calculator t...

View More

Duct Heat Gain and R-Value Insulation Ca...

Use this calculator to estimate duct heat gain as a percenta...

View More

Water use by cooling towers

Use this cooling tower water use calculator to estimate the ...

View More

Stair Pressurisation Calculator

This stair pressurisation calculator estimates the prelimina...

View More

What Happens in the Cold Heat Exchanger

Remember that R22 refrigerant vaporises at -42°C at atmo...

View More

Water Cooled Chiller Sizing Calculator

Use this water-cooled chiller sizing calculator to estimate ...

View More

Solar Air Conditioning

Solar energy has always been attractive to the building serv...

View More

HVAC Sheet Metal Zinc Coating

Zinc coating selection is critical for HVAC sheet metal dura...

View More

What is Refrigeration and Air Conditioni...

Are you looking to learn and take an air conditioning course...

View More

Energy conservation with comfort

You may already be aware of the rising cost of energy and th...

View More

Understanding the Psychrometric Chart

Although engineers and technicians need to know how the valu...

View More

Room Noise Predictor From AHU to Diffuse...

Use this room noise predictor to estimate the expected noise...

View More

Is Water a Good Refrigerant

Let’s remind ourselves of these two basic rules:There ...

View More

Average Person Sensible and Latent Heat ...

Use this calculator to estimate the sensible and latent heat...

View More

Chiller Power Consumption Calculation Us...

Use this chiller power consumption calculator to estimate ch...

View More

Guideline 36-2021: High Performance Sequ...

A field study on ASHRAE Guideline 36 revealed a hard truth. ...

View More

Carpark exhaust control

View More

Gas Detectors-Ammonia Refrigerant

View More

Primary-Secondary Pumping, Flow, Mixing,...

Use this primary-secondary pumping calculator to check how f...

View More

Predictive Maintenance and Condition Mon...

So, what is predictive maintenance? How do you use condition...

View More

Refrigerant R22

Before we get ahead of ourselves, R22 will phase out in Aust...

View More

Air Purifiers, Hepa Filters, or Air Filt...

View More

Emergency Warning and Intercommunication...

View More

Heat energy and change of phase

Heat energy and change of phaseComfort air conditioning syst...

View More

Thermal Insulation R-Value and U-Value C...

Use this calculator to calculate R-value and U-value from in...

View More

Solar PV Air Conditioner Sizing

Use this calculator to calculate how many solar panels are r...

View More

Legacy AHU Supply air fan speed control ...

Legacy Supply Air Fan Speed Control, A Smarter Way to Save E...

View More

Is Water a Good Refrigerant

Let’s remind ourselves of these two basic rules:There ...

View More

Split System Air Conditioners Installati...

The split system air conditioner has two parts: the indoor a...

View More

Natural Ventilation Design Mistakes

Natural ventilation can reduce mechanical cooling and fan en...

View More

Duct Heat Gain and R-Value Insulation Ca...

Use this calculator to estimate duct heat gain as a percenta...

View More

What is Boiling

The first step to understanding how the air conditioning ref...

View More

Water Cooled Chiller Sizing Calculator

Use this water-cooled chiller sizing calculator to estimate ...

View More

Conflict of Air Tightness Buildings and ...

Conflict of Air Tightness Buildings and Fire SafetyModern bu...

View More

Natural Ventilation FAQ

Natural ventilation can be an effective way to provide outdo...

View More

HVAC Duct Sizing Calculator

Use this calculator to calculate HVAC duct sizes using equal...

View More

Ground Source Heat Pump Size Estimator

Use this ground source heat pump size estimator to assess pr...

View More

Why Your High Efficient Condensing Boile...

Now that you have installed the high-efficiency condensing b...

View More

UN SDGs, good intentions, wrong priority...

The United Nations Sustainable Development Goals (UN SDGs), ...

View More

What consultants must learn from Lacross...

Disclaimer: The below is provided for general information an...

View More

HVAC calculators and Estimators

Free HVAC calculators and estimators for cooling, heating, a...

View More

Relative Pressure and Absolute Pressure

Relative Pressure and Absolute PressureThe deeper divers go ...

View More

How to size buffer tank

Buffer tank sizing is not an arbitrary exercise. Typical gui...

View More

Gas Detectors-Ammonia Refrigerant

View More

The Role of the Expansion Device (TXV an...

In the instance of a bicycle pump experiment, you will notic...

View More

How Does Refrigerant Work in Refrigerati...

Here are some typical operating conditions. As pressures dif...

View More

Dehumidified IEC System

TOTAL DEHUMIDIFIED IEC

View More

The Refrigeration Gauges

Let’s examine the refrigeration pressure gauge: this i...

View More

AS1668.2 2012 Appendix A Minimum OA

Use this AS 1668.2 outdoor air ventilation rate look up tool...

View More

The Evaporation of R22

Let’s take a cylinder of R22 at an ambient temperature...

View More

Water use by cooling towers

Use this cooling tower water use calculator to estimate the ...

View More

The Refrigeration Gauges

Let’s examine the refrigeration pressure gauge: this i...

View More

Ground Source Heat Pump Size Estimator

Use this ground source heat pump size estimator to assess pr...

View More

Transfer Duct Sizing Calculator

Use this calculator to estimate the total pressure drop acro...

View More

Refrigerant R22

Before we get ahead of ourselves, R22 will phase out in Aust...

View More

Chiller Sizing FAQs

This chiller sizing FAQ answers common questions about selec...

View More

The Role of the Expansion Device (TXV an...

In the instance of a bicycle pump experiment, you will notic...

View More

Dehumidification load in swimming pool

Use this swimming pool dehumidification load calculator to e...

View More

Coastal Corrosion of OA Dampers and Louv...

In a coastal environment, airborne salt settles on surfaces....

View More

Relative Pressure and Absolute Pressure

Relative Pressure and Absolute PressureThe deeper divers go ...

View More

Is Water a Good Refrigerant

Let’s remind ourselves of these two basic rules:There ...

View More

How to verify the percentage of outside ...

Use this outside air percentage calculator to estimate how m...

View More

What is Refrigeration and Air Conditioni...

Are you looking to learn and take an air conditioning course...

View More

Room Pressurisation Leakage and Fan Airf...

Use this calculator to estimate the airflow required to main...

View More

Water Cooled Chiller Sizing Calculator

Use this water-cooled chiller sizing calculator to estimate ...

View More

Conflict of Air Tightness Buildings and ...

Conflict of Air Tightness Buildings and Fire SafetyModern bu...

View More

Indirect Evaporative Cooling-The Univers...

In 2011, we were tasked to resolve the HVAC system design fo...

View More

Air conditioning back to basic principle...

Air conditioning basic principlesThe basis for air condition...

View More

Chiller System Designs Mistakes

Chilled water systems can become inefficient, unstable or ex...

View More

How to size buffer tank

Buffer tank sizing is not an arbitrary exercise. Typical gui...

View More

Climate challenges ...

Climate change sits at the intersection of science, politics...

View More

Connecting a 50hz induction motor and ru...

What happens if connecting a 50hz induction motor to 60hz po...

View More

Vibration calculator

Vibration CalculatorUse this vibration calculator to estimat...

View More

Cooling Coil Bypass Factor Calculator

Use this calculator to estimate cooling coil bypass factor u...

View More

Split System Air Conditioners Installati...

The split system air conditioner has two parts: the indoor a...

View More

Far Ultraviolet Germicidal Irradiation (...

Far-UVC Ultraviolet Germicidal Irradiation (UVGI)What do you...

View More

What is P, PI & PID controls

  An open loop system operates without feedback, i...

View More

Split System Air Conditioners Installati...

The split system air conditioner has two parts: the indoor a...

View More

Maisotsenko Cycle

View More

Correct installation of expansion vessel

Expansion vessels are often treated as simple pipework acces...

View More

Gas Detectors-Ammonia Refrigerant

View More

Indirect Evaporative Cooling-The Univers...

In 2011, we were tasked to resolve the HVAC system design fo...

View More

Personal Air Coolers

I reckon many personal air coolers are more marketing than e...

View More

Cost Saving Electronically Commutated (E...

One of the common reasons to adopt electronically commutated...

View More

What is Thermal Expansion Valve (TX Valv...

All air conditioning refrigeration circuits have expansion d...

View More

AS 1668.2 Minimum Outdoor Airflow Rate C...

Use this AS 1668.2 Minimum Outdoor Airflow Rate Calculator t...

View More

How to verify the percentage of outside ...

Use this outside air percentage calculator to estimate how m...

View More

Why Your High Efficient Condensing Boile...

Now that you have installed the high-efficiency condensing b...

View More

Heat transfer

Air conditioning is concerned with heat flow processes. Heat...

View More

What Happens When All AHU Dampers Are Cl...

A serious design problem occurs when all available airflow p...

View More

Why is my class room stale!

Those were the days my chief engineer checked all my designs...

View More

Small in Window Air Conditioner Units In...

As its name suggests, unitary window air conditioners consis...

View More

Aged Care Homes Comfort Envelope

Comfort in aged care homes is not just about setting the the...

View More

Carpark exhaust control

View More

Energy conservation with comfort

You may already be aware of the rising cost of energy and th...

View More

What do you want from your BMS 3/3

What do you want from your BMS. Part 3: Direct Expansion Eva...

View More

Chiller Sizing Example

This worked example shows how to size a chiller for a commer...

View More

Refrigerant Pipe Sizings

Refrigerant pipe sizingsSuction line velocity: 4.5m/s to max...

View More

Calculate Fan Motor Power

Use this fan motor power calculator to estimate the power re...

View More

Water use by cooling towers

Use this cooling tower water use calculator to estimate the ...

View More

Indirect Evaporative Cooling-The Univers...

In 2011, we were tasked to resolve the HVAC system design fo...

View More

The Role of the Expansion Device (TXV an...

In the instance of a bicycle pump experiment, you will notic...

View More

Refrigeration Cycles

As its name indicates, it’s in the evaporator that the...

View More

Cooling Coil Bypass Factor Calculator

Use this calculator to estimate cooling coil bypass factor u...

View More

Air Cooled Chiller Sizing Calculator

Use this air cooled chiller sizing calculator to estimate co...

View More

Heat energy and change of phase

Heat energy and change of phaseComfort air conditioning syst...

View More

Energy conservation with comfort

You may already be aware of the rising cost of energy and th...

View More

Dehumidified IEC System

TOTAL DEHUMIDIFIED IEC

View More

Evaporative Condenser Access and Mainten...

Providing safety access platforms for evaporative condensers...

View More

Understanding the Psychrometric Chart

Although engineers and technicians need to know how the valu...

View More

Indoor pool and wellness centre

Use this indoor pool and wellness centre calculator to estim...

View More

BCA Climate Zone Interactive Map

BCA Climate Zone Interactive MapUse the ACBC climate map to ...

View More

NCC2025 Part J6D9 Pipework insulation

Updated to NCC 2025(1) Piping, vessels, heat exchangers and ...

View More

Split System Air Conditioners Installati...

The split system air conditioner has two parts: the indoor a...

View More

Preliminary Cooling Load Estimation

Use this preliminary cooling load estimator to calculate an ...

View More

Connecting a 50hz induction motor and ru...

What happens if connecting a 50hz induction motor to 60hz po...

View More

Legacy AHU Supply air fan speed control ...

Legacy Supply Air Fan Speed Control, A Smarter Way to Save E...

View More

Emergency Warning and Intercommunication...

View More

What is Boiling

The first step to understanding how the air conditioning ref...

View More

How to verify the percentage of outside ...

Use this outside air percentage calculator to estimate how m...

View More

Chiller Sizing FAQs

This chiller sizing FAQ answers common questions about selec...

View More

Cost Saving Electronically Commutated (E...

One of the common reasons to adopt electronically commutated...

View More

Engineering innovation, is creativity th...

Engineering is often seen as a discipline of rules, standard...

View More

Stair pressurisation system

Stair pressurisation systemDoor average area: 2.1m2Design nu...

View More

Air and human comfort

Space explorations to the moon, other planets, and beyond ha...

View More

Chiller Sizing Example

This worked example shows how to size a chiller for a commer...

View More

Infrared heating

When you walk into a warehouse or sports arena with high-bay...

View More

What consultants must learn from Lacross...

Disclaimer: The below is provided for general information an...

View More

AS 1668.2 Mechanical Exhaust Ventilation...

Use this AS 1668.2 mechanical exhaust ventilation rate look-...

View More

Why is my class room stale!

Those were the days my chief engineer checked all my designs...

View More

Calculate Fan Motor Power

Use this fan motor power calculator to estimate the power re...

View More

What is an Air Conditioner Evaporator Co...

The evaporator is a heat exchanger that operates on the same...

View More

AS 1668.4 Natural Ventilation Opening Ar...

Use this calculator to estimate minimum natural ventilation ...

View More

Psychrometric calculator

Use this free HVAC Psychrometric Calculator to calculate moi...

View More

Vibration calculator

Vibration CalculatorUse this vibration calculator to estimat...

View More

BCA Climate Zone Interactive Map

BCA Climate Zone Interactive MapUse the ACBC climate map to ...

View More

Chiller Sizing Calculator

Use this chiller sizing calculator to estimate key HVAC chil...

View More

AS 1668.2 Kitchen Exhaust Calculator

Use this AS 1668.2 kitchen exhaust calculator to estimate mi...

View More

Connecting a 50hz induction motor and ru...

What happens if connecting a 50hz induction motor to 60hz po...

View More

Indirect Evaporative Cooling-The Univers...

In 2011, we were tasked to resolve the HVAC system design fo...

View More

Passive House (Haus) Designs, Heat Recov...

The rise of Passive House design has fundamentally reshaped ...

View More

How a chiller controls its capacity and ...

A chiller controls its capacity mainly by maintaining the le...

View More

Ground Source Heat Pump Size Estimator

Use this ground source heat pump size estimator to assess pr...

View More

Natural Ventilation Designs

 https://www.monodraught.com/https://greenhome.osu.edu/...

View More

Water Cooled Chiller Sizing Calculator

Use this water-cooled chiller sizing calculator to estimate ...

View More

Far Ultraviolet Germicidal Irradiation (...

Far-UVC Ultraviolet Germicidal Irradiation (UVGI)What do you...

View More

How to verify the percentage of outside ...

Use this outside air percentage calculator to estimate how m...

View More

Personal Air Coolers

I reckon many personal air coolers are more marketing than e...

View More

What is Refrigeration and Air Conditioni...

Are you looking to learn and take an air conditioning course...

View More

AS 1668.4 Natural Ventilation Opening Ar...

Use this calculator to estimate minimum natural ventilation ...

View More

Preliminary Cooling Load Estimation

Use this preliminary cooling load estimator to calculate an ...

View More

Thermal Insulation R-Value and U-Value C...

Use this calculator to calculate R-value and U-value from in...

View More

Relative Pressure and Absolute Pressure

Relative Pressure and Absolute PressureThe deeper divers go ...

View More

ERV energy recovery calculator

Use this HVAC air-to-air heat exchanger and ERV calculator t...

View More

Calculate Fan Motor Power

Use this fan motor power calculator to estimate the power re...

View More

Geospatial 3D Point Cloud Laser Scanning

Geospatial 3D point cloud laser scanning is a method of capt...

View More

AS 1668.2 2012 Car Park Exhaust Calculat...

Use this calculator to calculate the minimum exhaust airflow...

View More

Split System Air Conditioners Installati...

The split system air conditioner has two parts: the indoor a...

View More

Stair pressurisation system

Stair pressurisation systemDoor average area: 2.1m2Design nu...

View More

Chiller Sizing Example

This worked example shows how to size a chiller for a commer...

View More

Conflict of Air Tightness Buildings and ...

Conflict of Air Tightness Buildings and Fire SafetyModern bu...

View More

How reciprocating compressors work in ai...

The reciprocating compressors (piston compressors or recip c...

View More

Solar PV Air Conditioner Sizing

Use this calculator to calculate how many solar panels are r...

View More

Emergency Warning and Intercommunication...

View More

Split System Air Conditioners Installati...

The split system air conditioner has two parts: the indoor a...

View More

Why Your High Efficient Condensing Boile...

Now that you have installed the high-efficiency condensing b...

View More

Solar Air Conditioning

Solar energy has always been attractive to the building serv...

View More

Transfer Duct Sizing Calculator

Use this calculator to estimate the total pressure drop acro...

View More

Properties of air-psychrometry

Air is the medium with which buildings are cooled and heated...

View More

Solar Absorption Chiller Sizing Calculat...

Use this calculator to estimate solar collector area, storag...

View More

Why Condenser Coil Fins Flaking and Fall...

When condenser fins become brittle, flake and fall apart whe...

View More

Design, construction and fit-out of food...

Practical Guide for Western Australian Food PremisesDesignin...

View More

Energy conservation with comfort

You may already be aware of the rising cost of energy and th...

View More

Cooling Coil Bypass Factor Calculator

Use this calculator to estimate cooling coil bypass factor u...

View More

Cost Saving Electronically Commutated (E...

One of the common reasons to adopt electronically commutated...

View More

Natural Ventilation FAQ

Natural ventilation can be an effective way to provide outdo...

View More

How reciprocating compressors work in ai...

The reciprocating compressors (piston compressors or recip c...

View More

Chiller System Designs Checklist

Before finalising the chiller selection, review the followin...

View More

Mould growth provisions for NCC 2022

Mould Growth Provisions for NCC 2022First published in Linke...

View More

Henrys Law and Cavitation

Henry's Law and cavitationEver wondered why a perfectly ...

View More

Removing Mould and Mould Stains

Removing Mouldconcrobium.com/en-au/Walk into Bunnings or har...

View More

Dehumidification load in swimming pool

Use this swimming pool dehumidification load calculator to e...

View More

AS 1668.2 bathroom and toilet exhaust ve...

Use this AS 1668.2 bathroom and toilet exhaust ventilation c...

View More

High Latent Load Dehumidification Reheat...

Use this calculator to check high latent load cooling and de...

View More

NCC2025 Part J6D9 Pipework insulation

Updated to NCC 2025(1) Piping, vessels, heat exchangers and ...

View More

The Refrigeration Gauges

Let’s examine the refrigeration pressure gauge: this i...

View More

What is Refrigeration and Air Conditioni...

Are you looking to learn and take an air conditioning course...

View More

What Happens When All AHU Dampers Are Cl...

A serious design problem occurs when all available airflow p...

View More

Conflict of Air Tightness Buildings and ...

Conflict of Air Tightness Buildings and Fire SafetyModern bu...

View More

So What is New in Refrigerant?

From CFCs to HFOs, how Refrigerant Policy Evolved from Ozone...

View More

Lubricant Related Compressor Failures

If you strip away all the marketing noise around lubricants,...

View More

Correct installation of expansion vessel

Expansion vessels are often treated as simple pipework acces...

View More

What consultants must learn from Lacross...

Disclaimer: The below is provided for general information an...

View More