[Ord. 2008-813; Ord. No. 2019-165, 1-6-2020; Ord. No. 2023-253, 6-19-2023; Ord. No. 2025-280, 12-1-2025]
Pursuant to Title 31, Article 16, Part 2, C.R.S., the International Energy Conservation Code, 2024 Edition, as published by the International Code Council, 4051 West Flossmoor Road, Country Club Hills, IL 60478, Chapters 1 through 6 Commercial, Chapters 1 through 6 Residential ("IECC"), is hereby adopted by reference as the Town of Johnstown Energy Conservation Code to have the same force and effect as if fully set forth herein.
[Ord. 2008-813]
Where, in any specific case, different sections of this Code, the zoning code or other ordinances of the Town specify different materials, methods of construction or other requirements, the most restrictive shall govern.
[Ord. 2008-813; Ord. No. 2019-165, 1-6-2020; Ord. No. 2023-253, 6-19-2023; Ord. No. 2025-280, 12-1-2025]
The International Energy Conservation Code, 2024 Edition, adopted herein, is hereby modified with the following additions, deletions and/or insertions:
(1) 
IECC Section C101.1 (Title) is amended by the addition of the term "Town of Johnstown" where indicated.
(2) 
IECC Section 103.1 (Creation of Agency) is amended by adding "Town of Johnstown" where indicated.
(3) 
IECC Section 109.1 (General) is amended by deleting the last three paragraphs and inserting the following:
"The members of the Board of Appeals shall be comprised of the members of the Town Council."
(4) 
IECC Section 109.3 (Qualifications) is amended by the deletion of this section in its entirety.
(5) 
IECC Section R202 (General Definitions) is retained except the following addition:
Dwelling Unit Enclosure Area: The sum of all the boundary surfaces that define the dwelling unit, including top/ceiling, bottom/floor, and the sides of all walls. This does not include interior partition walls within the dwelling unit. Wall height should be measured from the finished floor of the dwelling unit to the underside of the floor above (rather than stopping at the finished ceiling).
(6) 
IECC Section R402.5.1.3 (Testing) is amended to read as follow:
Single family detached buildings or dwelling units shall be tested and verified as having an air leakage rate of not exceeding three air changes per hour in Climate Zones 1 through 8, or 0.24 cubic feet per minute at 50 Pascals/square feet of dwelling unit enclosure area. Attached single family or multifamily buildings or dwelling units shall be tested and verified as having an air leakage rate of five or less air changes per hour in Climate Zones 1 through 8 or 0.30 cubic feet per minute at 50 Pascals/square feet of dwelling unit enclosure area.
(7) 
IECC Section R403.3.7 (Duct testing (Mandatory)) is amended to read as follows:
Ducts shall be pressure tested to determine air leakage by one of the following methods: and shall not leak more than 4 cubic feet per minute (113.3 L/min) per 100 square feet (9.29 m2) of conditioned floor area served, (4cfm/100sqft), when the air handler is installed at the time of the test. When the air handler is not installed at the time of the test, the total leakage shall be less than or equal to 3 cubic feet per minute (85 L/min) per 100 square feet (9.29 m2) of conditioned floor area; (3cfm/100sqft). Registers shall be taped or otherwise sealed during the test.
Rough-in test: Total leakage shall be measured with a pressure differential of 0.1 inch w.g. (25 Pa) across the system, including the manufacturer's air handler enclosure if installed at the time of the test. All registers shall be taped or otherwise sealed during the test.
2.
Postconstruction test: Total leakage shall be measured with a pressure differential of 0.1 inch w.g. (25 Pa) across the entire system, including the manufacturer's air handler enclosure. Registers shall be taped or otherwise sealed during the test.
Exception:
a.
A duct air leakage test shall not be required where the ducts and air handlers are located entirely within the building thermal envelope.
b.
If the HVAC duct system is serving less than or equal to 1,200 square feet of conditioned floor area, the allowable duct leakage shall be 60 cubic feet per minute or less.
A written report of the results of the test shall be signed by the party conducting the test and provided to the code official.