HERS RATER EXAM (ACTUAL 2025/2026) QUESTIONS AND
VERIFIED CORRECT ANSWERS
If a building material has an R-value of 3.6 per inch and is
installed to a thickness of 3 1/2 inches, what is the U-factor?
R-value = 3.6 × 3.5 inches
= 12.6
U-factor = 1 / R-value
= .6
= 0.079
How much heat flows through that window if the interior
temperature is 73°F and the outside temperature is 45°F?
Q = U x A x ∆T
Q = 0.43 x 15 x 28
Q = 181 Btu/hr
How much heat flows through that wall if the interior
temperature is 70°F and the outside temperature is 34°F?
Q = U x A x ∆T
Q = 0.0578 x 105 x 36
,Q = 218 Btu/hr
What are the 3 types of heat transfer?
Convective, conductive, and radiant
Your significant other is standing next to a north facing window
on a cold winter night, bitterly complaining about catching a
chill. What type of heat transfer is occurring?
Radiation
Homes are heated or cooled by what types of heat transfer?
Give examples.
Convection (forced air systems), Radiation (radiant floors)
What is the 2nd Law of Thermodynamics?
Systems in contact with each other that have differences tend
to balance. Air, heat, and water move from areas of high
concentration to areas of less concentration (high pressure to
low pressure, hot to cold, wet to dry).
What are the elements of a construction drawing?
, The elements of a drawing are lines, dimensions, symbols, and
notes.
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
Which view shows horizontal dimensions?
Plan view
Which view shows vertical dimensions?
Elevation view
Which view would indicate the insulation levels?
Section View
Why are overhang dimensions important?
To determine the amount of solar shading over the windows
VERIFIED CORRECT ANSWERS
If a building material has an R-value of 3.6 per inch and is
installed to a thickness of 3 1/2 inches, what is the U-factor?
R-value = 3.6 × 3.5 inches
= 12.6
U-factor = 1 / R-value
= .6
= 0.079
How much heat flows through that window if the interior
temperature is 73°F and the outside temperature is 45°F?
Q = U x A x ∆T
Q = 0.43 x 15 x 28
Q = 181 Btu/hr
How much heat flows through that wall if the interior
temperature is 70°F and the outside temperature is 34°F?
Q = U x A x ∆T
Q = 0.0578 x 105 x 36
,Q = 218 Btu/hr
What are the 3 types of heat transfer?
Convective, conductive, and radiant
Your significant other is standing next to a north facing window
on a cold winter night, bitterly complaining about catching a
chill. What type of heat transfer is occurring?
Radiation
Homes are heated or cooled by what types of heat transfer?
Give examples.
Convection (forced air systems), Radiation (radiant floors)
What is the 2nd Law of Thermodynamics?
Systems in contact with each other that have differences tend
to balance. Air, heat, and water move from areas of high
concentration to areas of less concentration (high pressure to
low pressure, hot to cold, wet to dry).
What are the elements of a construction drawing?
, The elements of a drawing are lines, dimensions, symbols, and
notes.
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
Which view shows horizontal dimensions?
Plan view
Which view shows vertical dimensions?
Elevation view
Which view would indicate the insulation levels?
Section View
Why are overhang dimensions important?
To determine the amount of solar shading over the windows
