What IS allowed under a mechanical quick permit
Single-family and duplex structures and garages:
- Compressor units
- Ductwork
- Evaporative cooling units
- Exhaust systems
- Fireplaces (prefab metal, gas log, gas piping, gas vent)
- Forced air heating systems
- Gas piping
- Make-up air units
- Range hoods
- Roof-top units (10 tons or less)
- Through-wall heaters
- Unit heaters
- Ventilating systems
- Water heaters
Multifamily and commercial structures:
Like-for-like replacements of the following — no new installs — and the replacement does not have a change in geometry, demand, or material. *Starting March 1, 2023, select gas-fired equipment (starred below) will not be eligible for a quick permit.
- Compressor, condenser, or direct expansion units*
- Ductwork
- Evaporative cooling units
- Exhaust systems
- Fireplaces (prefab metal, gas log, gas piping, gas vent)
- Forced air heating systems*
- Gas piping
- Make-up air units
- Medical gas
- Roof-top units*
- Through-wall heaters
- Unit heaters
- Ventilating systems
- Water heaters*
Ensure that replacement equipment meets current IECC efficiency standards, which will need to be verified upon inspection.
What is NOT allowed under a mechanical quick permit
The mechanical items listed below CANNOT be permitted under a quick permit. Select the Building Log application in e-permits to submit plans for review for the following projects:
Plans uploaded for review must be signed and stamped by a licensed design professional or professional engineer.
- Residential A/C
- Duct, stock, and vapor removal systems
- Repair/replace of equipment for which the system was not originally designed (e.g., replacing equipment under a kitchen hood for which the hood was not originally designed)
- Repairs/replacements that are not like-for-like or that require other associated upgrades (e.g., replacing toilet fixtures in a commercial restroom that may require ADA improvements, or replacing gas-fired equipment with higher efficiency equipment that might also require a new chimney liner or separate flue)
- Compressor, condenser, or direct expansion units that serve a heated space**
- Gas-fired forced air heating systems**
- Gas-fired roof-top units**
- Gas-fired water heaters**
**Starting on March 1, 2023, compressor, condenser, or direct expansion units that serve a heated space, gas-fired forced air heating systems, gas-fired roof-top units, and gas-fired water heaters, for commercial and multifamily buildings will not be able to apply for a quick permit. Select the Building Log application in e-permits and upload the following information for review:
- Application for a mechanical permit(PDF, 787KB), AND
- One of the following:
- Electrification Feasibility Report, OR
- Gas leak testing of all piping connected to the gas meter per the Denver Building Code IECC Section C503.4.1, item 2, (for water heater projects) OR
- A report prepared, signed, and stamped by a licensed design professional or professional engineer showing that the equipment is the correct size per the Denver Building Code IECC Section C403.3.1 (not for water heater projects)
Note: Gas-fired roof-top units and gas-fired forced air heating systems must select two of the above options.
Learn more about Denver's electrification requirements