There are two types of air-handling systems: constant volume (CV), and variable air volume (VAV). In a CV system, a constant amount of air flows through the system whenever it…
Outside ductless heat pump compressor Mini-split heat pumps, also referred to as ductless heat pumps, are an alternative to radiators and baseboard heating, as well as a replacement for window…
An evaporative cooling system is different from an air conditioning system in that an air conditioning system relies on refrigerant gases and a chemical process to cool the air, whereas…
A hanging gas furnace is a cost-effective alternative to a central heating system in warehouses, garages, loading docks, and manufacturing environments that typically have high ceilings and open floor plans,…
Evaporative cooling is a technology that utilizes evaporation and blowing air to cool buildings. It may be the sole cooling source, or it may be combined with an air conditioning…
There are various types of electric heating systems. They all use electricity to transfer heat in the following three ways: forced air; convection; and radiation. Here, we are concerned with…
There are two different types of boilers found in commercial buildings: hot water and steam boilers. There are similarities between the two types of boilers, and differences as well. Both…
The RTU is the most widely used commercial heating and the cooling unit found in the U.S. The rooftop unit is sometimes called a package unit, as all its components…
Cast-iron boilers are often found in residential applications and small commercial installations. These boilers are compact and function exclusively in low-pressure steam or hot-water applications. The physical size of a…
by Joe Farsetta, Certified Master Inspector® and Certified Commercial Inspector The fuel or gas train is a series of components – some working independently, and others working in tandem with…
by Joe Farsetta, Certified Master Inspector® and Certified Commercial Inspector Steam boilers can be simple or complex, depending on their application, the fuel available, and specific requirements and demands,…
by Joe Farsetta, Certified Master Inspector® and Certified Commercial Inspector While there are several types of steam boilers, their basic operating principles are nearly identical. Water is heated to a…