What IS allowed under a mechanical quick permit
Single-family and duplex structures and garages:
- Residential A/C
- 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.
- 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 C503.3.3, item 3, (for space heating equpment) or 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