HERS Rater EXAM (2025) QUESTIONS AND (elaborated) WITH
COMPLETE SOLUTIONS
250 Pascals is how many inches of water gauge? - ✔✔1 Pascal
= 0.004 inches at sea level
250 Pascals = 0.004*250 inches at sea level
= 1 inch at sea level
A homeowner has paid for 17 CCF of natural gas on their
monthly bill. How many Btu's did they use? - ✔✔1 CCF =
102,000 Btu's
17 CCF = 17 x 102,000 = 1,734,000
Adiabatic walls are found in what type of construction? -
✔✔Multifamily
An air source heat pump? - ✔✔7.8 HSPF heating mode, 13
SEER cooling mode
Can any energy analysis software be used to produce a HERS
rating? - ✔✔No -- The software must be a RESNET accredited
software tool.
,Describe a "Section View" - ✔✔A sectional view is like looking
at a slice of the house. It shows the details of the construction
as well as the relationships between floors/ceilings and
header heights
Do thermal breaks in metal framed windows raise or lower
the U-factor? - ✔✔Lowers the U-factor.
Homes are heated or cooled by what types of heat transfer?
Give examples. - ✔✔Convection (forced air systems),
Radiation (radiant floors)
How are window dimensions determined? - ✔✔By measuring
the rough opening (frame + glass).
How can you tell if a coating is installed on a window? -
✔✔Use a lighter or match and count the reflections (1
reflection per pane or coating)
How do you correct for magnetic deviation? - ✔✔Magnetic
North must be determined with a compass that hasn't been
affected, and then the affected compass is pointed in the
known direction of magnetic North. If the affected compass is
, off to the West, the appropriate number of degrees is added;
if the compass is off to the East, the appropriate number of
degrees is subtracted. This information should stay with the
compass as a correction card.
How do you determine the orientation of the windows in an
exterior wall? - ✔✔Stand with your back to the outside of the
wall and look at the direction of the compass needle in
reference to the direction you are facing.
How is the HSPF calculated? - ✔✔Btu's of heating / watts of
electricity to produce the heating
How is the SEER calculated? - ✔✔Btu's of cooling / watts of
electricity to produce the cooling
How many gallons of mid-grade gasoline equal the energy
content of 1 cord of apple wood? - ✔✔1 MMBtu = 1,000,000
Btu
28.72 MMBtu = 28,720,000 Btu
1 gallon of mid-grade gasoline = 125,000 Btu
28,720,000 Btu / 125,000 Btu = 229.76 gallons of mid-grade
gasoline
COMPLETE SOLUTIONS
250 Pascals is how many inches of water gauge? - ✔✔1 Pascal
= 0.004 inches at sea level
250 Pascals = 0.004*250 inches at sea level
= 1 inch at sea level
A homeowner has paid for 17 CCF of natural gas on their
monthly bill. How many Btu's did they use? - ✔✔1 CCF =
102,000 Btu's
17 CCF = 17 x 102,000 = 1,734,000
Adiabatic walls are found in what type of construction? -
✔✔Multifamily
An air source heat pump? - ✔✔7.8 HSPF heating mode, 13
SEER cooling mode
Can any energy analysis software be used to produce a HERS
rating? - ✔✔No -- The software must be a RESNET accredited
software tool.
,Describe a "Section View" - ✔✔A sectional view is like looking
at a slice of the house. It shows the details of the construction
as well as the relationships between floors/ceilings and
header heights
Do thermal breaks in metal framed windows raise or lower
the U-factor? - ✔✔Lowers the U-factor.
Homes are heated or cooled by what types of heat transfer?
Give examples. - ✔✔Convection (forced air systems),
Radiation (radiant floors)
How are window dimensions determined? - ✔✔By measuring
the rough opening (frame + glass).
How can you tell if a coating is installed on a window? -
✔✔Use a lighter or match and count the reflections (1
reflection per pane or coating)
How do you correct for magnetic deviation? - ✔✔Magnetic
North must be determined with a compass that hasn't been
affected, and then the affected compass is pointed in the
known direction of magnetic North. If the affected compass is
, off to the West, the appropriate number of degrees is added;
if the compass is off to the East, the appropriate number of
degrees is subtracted. This information should stay with the
compass as a correction card.
How do you determine the orientation of the windows in an
exterior wall? - ✔✔Stand with your back to the outside of the
wall and look at the direction of the compass needle in
reference to the direction you are facing.
How is the HSPF calculated? - ✔✔Btu's of heating / watts of
electricity to produce the heating
How is the SEER calculated? - ✔✔Btu's of cooling / watts of
electricity to produce the cooling
How many gallons of mid-grade gasoline equal the energy
content of 1 cord of apple wood? - ✔✔1 MMBtu = 1,000,000
Btu
28.72 MMBtu = 28,720,000 Btu
1 gallon of mid-grade gasoline = 125,000 Btu
28,720,000 Btu / 125,000 Btu = 229.76 gallons of mid-grade
gasoline
