TREC Home Inspector National Exam –
HVAC Questions and Answers Already
Passed
For mechanical systems, a level working space at least inches deep and
inches wide shall be provided in front of the control side to service an
appliance. ✔✔30"; 30"
When mechanical equipment is located in attics, it shall not be further than
feet from the attic access. ✔✔20'
Attics containing mechanical appliance shall be provided with an opening and a clear and
unobstructed passageway to allow removal of the appliance. ✔✔largest
Mechanical appliances installed in attics shall have a luminaire controlled by a switch located at
the required and a receptacle outlet provided
at or near the appliance location. ✔✔passageway opening
Mechanical appliances suspended from the floor shall have a clearance of not less than
inches from the ground. ✔✔6"
Mechanical appliances having an ignition source shall be elevated such that the source of ignition
is not less than above the floor in garages. ✔✔18"
Supports and foundations for the outdoor unit of a heat pump shall be raised at least
inches above the ground. ✔✔3"
, A 4-inch radius mitered 45 degree elbow dryer exhaust duct fitting shall reduce the maximum 35-
foot length of a dryer duct by feet, inches.
✔✔2'; 6"
Where a space for a is provided, an exhaust
duct system shall be installed. ✔✔clothes dryer
Under-floor plenums shall be in new structures. ✔✔prohibited
Outdoor and return air for a forced-air heating or cooling system shall not be taken from
. ✔✔closets, bathrooms, toilet rooms, kitchens, garages, boiler rooms,
furnace rooms, unconditioned attics, or other dwelling units
For mechanical system installations in flood hazard areas,
openings shall be located at or above the required elevation.
✔✔combustion air
Manually operated vent shall not be installed except in connectors or
chimneys serving solid-fuel-burning appliances. ✔✔dampers
Freestanding or built-in ranges shall have a vertical clearance above the cooking top of not less
than inches to unprotected combustible material. ✔✔30"
Sauna heaters shall be equipped with a thermostat that will limit room temperature to not greater
than degrees F. ✔✔194⁰F
For gas appliance installations using the two-permanent-openings method for combustible air from
the outdoors, one opening shall be within inches of the top and one
within inches of the bottom of the space. ✔✔12"; 12"
HVAC Questions and Answers Already
Passed
For mechanical systems, a level working space at least inches deep and
inches wide shall be provided in front of the control side to service an
appliance. ✔✔30"; 30"
When mechanical equipment is located in attics, it shall not be further than
feet from the attic access. ✔✔20'
Attics containing mechanical appliance shall be provided with an opening and a clear and
unobstructed passageway to allow removal of the appliance. ✔✔largest
Mechanical appliances installed in attics shall have a luminaire controlled by a switch located at
the required and a receptacle outlet provided
at or near the appliance location. ✔✔passageway opening
Mechanical appliances suspended from the floor shall have a clearance of not less than
inches from the ground. ✔✔6"
Mechanical appliances having an ignition source shall be elevated such that the source of ignition
is not less than above the floor in garages. ✔✔18"
Supports and foundations for the outdoor unit of a heat pump shall be raised at least
inches above the ground. ✔✔3"
, A 4-inch radius mitered 45 degree elbow dryer exhaust duct fitting shall reduce the maximum 35-
foot length of a dryer duct by feet, inches.
✔✔2'; 6"
Where a space for a is provided, an exhaust
duct system shall be installed. ✔✔clothes dryer
Under-floor plenums shall be in new structures. ✔✔prohibited
Outdoor and return air for a forced-air heating or cooling system shall not be taken from
. ✔✔closets, bathrooms, toilet rooms, kitchens, garages, boiler rooms,
furnace rooms, unconditioned attics, or other dwelling units
For mechanical system installations in flood hazard areas,
openings shall be located at or above the required elevation.
✔✔combustion air
Manually operated vent shall not be installed except in connectors or
chimneys serving solid-fuel-burning appliances. ✔✔dampers
Freestanding or built-in ranges shall have a vertical clearance above the cooking top of not less
than inches to unprotected combustible material. ✔✔30"
Sauna heaters shall be equipped with a thermostat that will limit room temperature to not greater
than degrees F. ✔✔194⁰F
For gas appliance installations using the two-permanent-openings method for combustible air from
the outdoors, one opening shall be within inches of the top and one
within inches of the bottom of the space. ✔✔12"; 12"
