ICC Commercial Energy Plans Examiner
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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Question 1
Which of the following is the primary purpose of the commercial energy code as
adopted by the ICC?
A. To mandate renewable energy generation for all new commercial buildings
B. To establish minimum energy efficiency requirements for commercial buildings
C. To eliminate all fossil fuel usage in commercial structures
D. To set maximum occupancy limits based on energy consumption
Answer: B. To establish minimum energy efficiency requirements for commercial
buildings
Rationale: The primary purpose of the ICC commercial energy code (based on
the IECC) is to set minimum, cost-effective energy efficiency standards for
commercial buildings. It does not mandate renewables, eliminate fossil fuels, or
regulate occupancy.
Question 2
Under the IECC, the building thermal envelope includes all of the following
EXCEPT:
A. Exterior walls
B. Roofs and ceilings
,C. Interior partition walls
D. Floors over unconditioned spaces
Answer: C. Interior partition walls
Rationale: The thermal envelope is defined as the barrier between conditioned
and unconditioned space. Interior partition walls do not separate conditioned
from unconditioned space and are therefore not part of the thermal envelope.
Question 3
What is the maximum allowable air leakage rate for commercial building envelope
assemblies under the IECC?
A. 0.40 CFM/ft² at 0.30 inches w.c.
B. 0.25 CFM/ft² at 1.0 inches w.c.
C. 0.40 CFM/ft² at 0.75 inches w.c.
D. 1.0 CFM/ft² at 0.30 inches w.c.
Answer: A. 0.40 CFM/ft² at 0.30 inches w.c.
Rationale: IECC Section C402.5.1 requires commercial building envelope
assemblies to have an air leakage rate not exceeding 0.40 CFM/ft² when tested
at a pressure differential of 0.30 inches of water column.
Question 4
Which climate zone has the highest insulation R-value requirements for
roof/ceiling assemblies?
A. Climate Zone 1
B. Climate Zone 3
C. Climate Zone 5
D. Climate Zone 7
Answer: D. Climate Zone 7
Rationale: Colder climates (higher zone numbers) require greater insulation.
Climate Zone 7 has among the highest R-value requirements for roofs, ceilings,
walls, and floors due to severe winter conditions.
,Question 5
For a commercial building with a floor area of 25,000 square feet, the IECC
requires what percentage of the roof to be covered with cool roof materials in
climate zones 1-3?
A. Not required
B. 50%
C. 75%
D. 100%
Answer: C. 75%
Rationale: IECC Section C402.3 requires that in climate zones 1, 2, and 3, at least
75% of the roof surface (excluding rooftop equipment) meet cool roof criteria for
low-sloped roofs.
Question 6
The solar reflectance index (SRI) for a low-sloped cool roof in climate zones 1-3
must be at least:
A. 64
B. 75
C. 80
D. 100
Answer: A. 64
Rationale: IECC requires a minimum SRI of 64 for low-sloped roofs and 20 for
steep-sloped roofs in climate zones 1-3, with certain exceptions for aged values.
Question 7
Which fenestration U-factor is the most energy-efficient (lowest heat loss)?
A. U-factor = 0.30
B. U-factor = 0.45
, C. U-factor = 0.55
D. U-factor = 0.65
Answer: A. U-factor = 0.30
Rationale: U-factor measures heat transfer; lower values indicate better
insulating performance. A U-factor of 0.30 is more efficient than 0.45, 0.55, or
0.65.
Question 8
The IECC requires that commercial building heating and cooling equipment be
sized according to:
A. The maximum building load at design conditions
B. The minimum building load at 50% occupancy
C. The average annual load profile
D. ACCA Manual J or an approved equivalent
Answer: A. The maximum building load at design conditions
Rationale: Equipment must be sized to meet the maximum heating and cooling
loads at design outdoor conditions, ensuring capacity without oversizing, per
IECC C403.7.
Question 9
What is the minimum required efficiency for a packaged rooftop air conditioner
(cooling only) with a capacity of 65,000 Btu/h under the IECC?
A. SEER 13
B. EER 11.2
C. IEER 10.0
D. COP 3.0
Answer: B. EER 11.2
Rationale: For equipment < 65,000 Btu/h, the minimum EER is 11.2 for cooling-
only units. Larger units have different IEER requirements.
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
Question 1
Which of the following is the primary purpose of the commercial energy code as
adopted by the ICC?
A. To mandate renewable energy generation for all new commercial buildings
B. To establish minimum energy efficiency requirements for commercial buildings
C. To eliminate all fossil fuel usage in commercial structures
D. To set maximum occupancy limits based on energy consumption
Answer: B. To establish minimum energy efficiency requirements for commercial
buildings
Rationale: The primary purpose of the ICC commercial energy code (based on
the IECC) is to set minimum, cost-effective energy efficiency standards for
commercial buildings. It does not mandate renewables, eliminate fossil fuels, or
regulate occupancy.
Question 2
Under the IECC, the building thermal envelope includes all of the following
EXCEPT:
A. Exterior walls
B. Roofs and ceilings
,C. Interior partition walls
D. Floors over unconditioned spaces
Answer: C. Interior partition walls
Rationale: The thermal envelope is defined as the barrier between conditioned
and unconditioned space. Interior partition walls do not separate conditioned
from unconditioned space and are therefore not part of the thermal envelope.
Question 3
What is the maximum allowable air leakage rate for commercial building envelope
assemblies under the IECC?
A. 0.40 CFM/ft² at 0.30 inches w.c.
B. 0.25 CFM/ft² at 1.0 inches w.c.
C. 0.40 CFM/ft² at 0.75 inches w.c.
D. 1.0 CFM/ft² at 0.30 inches w.c.
Answer: A. 0.40 CFM/ft² at 0.30 inches w.c.
Rationale: IECC Section C402.5.1 requires commercial building envelope
assemblies to have an air leakage rate not exceeding 0.40 CFM/ft² when tested
at a pressure differential of 0.30 inches of water column.
Question 4
Which climate zone has the highest insulation R-value requirements for
roof/ceiling assemblies?
A. Climate Zone 1
B. Climate Zone 3
C. Climate Zone 5
D. Climate Zone 7
Answer: D. Climate Zone 7
Rationale: Colder climates (higher zone numbers) require greater insulation.
Climate Zone 7 has among the highest R-value requirements for roofs, ceilings,
walls, and floors due to severe winter conditions.
,Question 5
For a commercial building with a floor area of 25,000 square feet, the IECC
requires what percentage of the roof to be covered with cool roof materials in
climate zones 1-3?
A. Not required
B. 50%
C. 75%
D. 100%
Answer: C. 75%
Rationale: IECC Section C402.3 requires that in climate zones 1, 2, and 3, at least
75% of the roof surface (excluding rooftop equipment) meet cool roof criteria for
low-sloped roofs.
Question 6
The solar reflectance index (SRI) for a low-sloped cool roof in climate zones 1-3
must be at least:
A. 64
B. 75
C. 80
D. 100
Answer: A. 64
Rationale: IECC requires a minimum SRI of 64 for low-sloped roofs and 20 for
steep-sloped roofs in climate zones 1-3, with certain exceptions for aged values.
Question 7
Which fenestration U-factor is the most energy-efficient (lowest heat loss)?
A. U-factor = 0.30
B. U-factor = 0.45
, C. U-factor = 0.55
D. U-factor = 0.65
Answer: A. U-factor = 0.30
Rationale: U-factor measures heat transfer; lower values indicate better
insulating performance. A U-factor of 0.30 is more efficient than 0.45, 0.55, or
0.65.
Question 8
The IECC requires that commercial building heating and cooling equipment be
sized according to:
A. The maximum building load at design conditions
B. The minimum building load at 50% occupancy
C. The average annual load profile
D. ACCA Manual J or an approved equivalent
Answer: A. The maximum building load at design conditions
Rationale: Equipment must be sized to meet the maximum heating and cooling
loads at design outdoor conditions, ensuring capacity without oversizing, per
IECC C403.7.
Question 9
What is the minimum required efficiency for a packaged rooftop air conditioner
(cooling only) with a capacity of 65,000 Btu/h under the IECC?
A. SEER 13
B. EER 11.2
C. IEER 10.0
D. COP 3.0
Answer: B. EER 11.2
Rationale: For equipment < 65,000 Btu/h, the minimum EER is 11.2 for cooling-
only units. Larger units have different IEER requirements.
