If your AC stays on longer than it should, you may have a dirty filter. Clean or replace your filter to see if that remedies the situation....

VAV Air Handlers The air handler blower fan needs to modulate to vary the air flow depending on demand. Typical Variable Air Volume boxes h...

Direct Expansion Air Conditioning What It Is A direct expansion air conditioning (DX) system uses a refrigerant vapour expansion/compressi...

Chiller Descaler Why descale your chiller? Chillers, condensers and even cooling towers require maintenance due to the harsh mineral deposi...

Electrical Safety Lock Out Tag Out (LOTO) What is LOTO? Answer --) Electrical Lock Out Tag Out the physical restraint of all hazardous en...

bearings A mechanical bearing is a component used between two parts that allows rotational or liner movement, reducing friction and enhanci...

Heat load or heat gain A building or room gains heat from many sources. Inside occupants, computers, copiers, machinery, and lighting all pr...

VRV or VRF ? What’s the difference between VRV and VRF? Many people who ask this question, mistakenly interpret it as 2 different HVAC te...

A Variable Frequency Drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied t...

The overload relay is a protection device used in the compressor circuit on your refrigerator. Power is applied to the compressor motor win...

In a centrifugal compressor, 'surge' is a name given to a dangerously unstable gas condition in the compressor and condenser. Put s...

The flow separation will eventually cause a decrease in the discharge pressure, and flow from suction to discharge will resume. Surging can ...

Community Water Treatment Drinking water supplies in the United States are among the safest in the world. However, even in the U.S., drinki...

A vacuum is maintained in the condenser so that steam can easily flow and more work can be extracted from the steam in the turbine. How does...

Filter Driers Filter driers are devices used in a HVAC system that are a combination of filter and dryer (or drier). A filter is used ...

Two components are heavily relied upon in the industrial and manufacturing sectors, and these are the actuator and the valve. And...

Why is Air Conditioner Leaking Water Inside Here’s a common question we get during Florida summers, “Why is my AC leaking water ins...

So you’ve been told that your AC compressor’s “gone bad.” This will likely lead you to a series of questions. Questions like, how did this...

CFCs Number Cylinder Color Refrig. Name Application R-11 Orange Trichloromonofluoromethane Centrifugal Chillers R-12 White ...

This will cause the  following  symptoms failure of Exoension Valve: Low  evaporator (suction)  pressure ; High evaporator and com...

The Seven Greatest Safety Threats to HVAC Contractors Safety Threats to HVAC Contractors The HVAC industry provides ...

Coefficient of performance . The efficiency of a  refrigerator  or heat pump is given by a parameter called the  coefficient of performance...

Fan Coil Unit  Systems. A  fan coil unit ( FCU ) contains a fan which draws the air in a space into the unit then blows it over a cooling o...

Air Handling unit or AHU is an assembly of air conditioning components (such as fans, cooling coils, filters, humidifiers and dampers) int...