Blog

Liquidtight flexible non-metal conduit shall be securely fastened and supported:

Truss members shall not be cut, drilled, spliced or notched or altered without the written approval of a registered design professional.

When the water and refrigerant in a heat exchanger flow in opposite directions, it is referred to as ____.

Permits for HVAC installation or modification must be obtained prior to work starting.

Excess air for combustion appliances consists of:

Floor furnaces shall not be closer than 6 inches to the nearest wall and not less than _____ inches from the two adjoining sides

Minimum economizer settings are established by ASHRAE standard 62 based oin the ________ of the structure

The point of transfer for LP gas dispensing shall be at least ____ feet from public streets and ____ feet from the lot line of property that can be built on.

What type of vent is designed specifically for category I gas appliances?

The thermostatic expansion valve is designed to maintain a constant __________ in the evaporator.