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A branch take off fitting shall not be installed closer than…

Posted on: November 17, 2025 Last updated on: November 17, 2025 Written by: Anonymous
A branch take off fitting shall not be installed closer than 18 inches from a trunk end plate.(Manual D sec. 5)
Continue reading “A branch take off fitting shall not be installed closer than…”…

When replacing electrical components on a condensing unit, t…

Posted on: November 17, 2025 Last updated on: February 11, 2026 Written by: Anonymous
When replacing electrical components on a condensing unit, the disconnect should be in the ______ position and should be ________
Continue reading “When replacing electrical components on a condensing unit, t…”…

ASHRAE 62 reconmends furnace filters with a MERV rating of _…

Posted on: November 17, 2025 Last updated on: February 11, 2026 Written by: Anonymous
ASHRAE 62 reconmends furnace filters with a MERV rating of ______which will protect the furnace from damaging particulates and provide some removal of allergens.
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Calculate the required airflow in cubic feet per minute of a…

Posted on: November 17, 2025 Last updated on: February 11, 2026 Written by: Anonymous
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)
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PAG lubricants (glycol based polyalkylene glycol) attract an…

Posted on: November 17, 2025 Last updated on: February 11, 2026 Written by: Anonymous
PAG lubricants (glycol based polyalkylene glycol) attract and hold moisture and do not tolerate chlorine.
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The design cfm for a zone damper systems is the same for a s…

Posted on: November 17, 2025 Last updated on: November 17, 2025 Written by: Anonymous
The design cfm for a zone damper systems is the same for a single zone systems because (Manual D sec. 6)
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At least one supply air outlet is required for each conditio…

Posted on: November 17, 2025 Last updated on: November 17, 2025 Written by: Anonymous
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)
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Power factor is defined as the ratio between

Posted on: November 17, 2025 Last updated on: February 11, 2026 Written by: Anonymous
Power factor is defined as the ratio between
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Whenever a one pipe fuel oil system has been run dry, the sy…

Posted on: November 17, 2025 Last updated on: November 17, 2025 Written by: Anonymous
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.
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Outdoor air supplied to replace exfiltration and exhaust air…

Posted on: November 17, 2025 Last updated on: February 11, 2026 Written by: Anonymous
Outdoor air supplied to replace exfiltration and exhaust air and air used to support the combustion process is known as
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