A branch take off fitting shall not be installed closer than 18 inches from a trunk end plate.(Manual D sec. 5)

When replacing electrical components on a condensing unit, the disconnect should be in the ______ position and should be ________

ASHRAE 62 reconmends furnace filters with a MERV rating of ______which will protect the furnace from damaging particulates and provide some removal of allergens.

Calculate the required airflow in cubic feet per minute of an electric furnace that draws 60 amps at 240 volts. The measured temperature rise is 45 degrees F (Refrig. text page 813)

PAG lubricants (glycol based polyalkylene glycol) attract and hold moisture and do not tolerate chlorine.

The design cfm for a zone damper systems is the same for a single zone systems because (Manual D sec. 6)

At least one supply air outlet is required for each conditioned room or occupiable space. However, it is up to the designer if a room is to be supplied by more than one supply outlet.(Manual D sec. 6)

Power factor is defined as the ratio between

Whenever a one pipe fuel oil system has been run dry, the system must be bleed of air in the line before the next use. To bleed out the air, a tubing is placed on the bleed port and the port is turned counter clockwise.

Outdoor air supplied to replace exfiltration and exhaust air and air used to support the combustion process is known as