The two classifications of air conditioners are package air conditioners and split-system air conditioners.

A(n) ___ is matter that contaminates air, water, or soil.

In an air atomizing burner, steam and fuel are discharged to the burner for combustion after the flames reach the end of the combustion chamber.

In an air atomizing burner, steam and fuel are discharged to the burner for combustion after the flames reach the end of the combustion chamber.

A hot water heating system operates at ___.

The ___ promotes a whole-building approach to sustainability by recognizing performance in five key areas of human and environmental health.

Most noncondensing boilers could be forced to condense by changing the set points of the controls.

Some compression tanks are equipped with a ___ for determining the compression tank water level.

Some compression tanks are equipped with a ___ for determining the compression tank water level.

A hot water heating system is isolated from the makeup water supply line by a ___.