Areas expected to have the same thermal load. For more energy efficiency and to optimize cooling and heating performance, thermal zones may be divided by room, level or use. 

Air conditioning and heating system capacity is usually described by the system’s hourly BTU output, or BTU/h. The higher the BTU measurement, the more powerful the unit. For instance, a 10,000 BTU/h [..]

An appliance that heats water without the use of a storage tank. Water is heated as needed by an electric element or gas burner. They are also called "tankless" and "demand-type" w [..]

You must have JavaScript enabled in your browser to utilize the functionality of this website.

 - A measure of the actual amount of water vapor in the air. See Relative Humidity

The capturing of atoms, molecules or ions by the total volume of a substance. The captured matter is held onto and distributed throughout the absorbing substance. This differs from adsorption in which [..]

Attracting and holding onto (adhesion) of atoms, ions, molecules from a gas, liquid or disolved state to a solid surface. 

The trade association representing manufacturers of HVACR and water heating equipment within the global industry.

Air curtains, also called air doors or air screens, are self-contained units that are installed above doorways or next to openings for the purpose of creating an air barrier between two different spac [..]

This is the number of times per hour air "changes" within an enclosed space. It usually refers to air passing through a filtering system. ACH goes hand in hand with the measurement cubic fee [..]