Alternative and Specialized Heating and Cooling Systems

100 percent

A direct-fired make-up air unit typically achieves a combustion efficiency of ___.

Often use propeller fans to circulate the air

A major difference between common HVAC systems and air turnover systems ______.

Passive solar heating system

A thermosiphon system is a type of ___.

An antifreeze solution in the closed loop

Indirect active solar heating systems usually circulate ___.

Use compressed air to atomize the fuel

One difference in common fuel oil burners and waste oil burners is that waste oil burners installed indoors ______.

The condenser air also comes from indoors

One of the problems with spot coolers located indoors is that ___.

Liquid refrigerant at a low pressure and always above the dew point of the room

Some computer room rack cooling system evaporator coils are fed with ___.

At or slightly above the desired room temperature

The discharge air setpoint of a direct-fired make-up air unit is usually ___.

7.5

Unless a wood stove has a catalytic element, the maximum amount of smoke emissions, in grams per hour, allowed by the EPA is ___.

Creosote

When wood is burned in a wood stove, the chimney and/ or vent piping can become coated with ___.