Do I need a permit to replace my furnace in Herriman?

Yes. Herriman requires a mechanical permit for all furnace replacements, even same-model swaps. The permit ensures proper venting, gas connections, and combustion air requirements are met.

Do I need a Manual J calculation in Herriman?

Yes, for new HVAC installations. Herriman follows the International Mechanical Code which requires a Manual J load calculation to properly size heating and cooling equipment.

Mechanical / HVAC Permit in Herriman, Utah

Required for heating, ventilation, and air conditioning installations, replacements, and ductwork modifications in Herriman.

Verified 2026-06-27 · Source

When you need this permit

Furnace or boiler installation or replacement
Air conditioning system installation or replacement
Ductwork installation or major modification
Evaporative cooler installation
Fireplace or wood-burning stove installation

Required documents

Req
Mechanical Plan
Equipment location, duct layout, and sizing calculations
Req
Manual J Load Calculation
Heating/cooling load calculation for new systems
Req
Contractor License
Valid Utah HVAC contractor license (DOPL)
Opt
Equipment Specifications
Manufacturer data sheets for furnace, AC, or heat pump

Fee schedule

Fee type	Amount	Notes
Mechanical Permit (Residential)	$100	—
Mechanical Permit (Non-Residential)	$153	—

Review timeline

7–10 business days

Herriman’s published plan-review target

Inspection process

1
Rough-In
Ductwork and gas piping installed, before walls closed — verify clearances and support
2
Final
Equipment operational, combustion air verified, gas pressure tested, thermostat functional

Tips

Like-for-like furnace and AC replacements in Herriman still require a mechanical permit.
Manual J calculations are required for all new HVAC systems — oversized systems will be flagged.
High-efficiency furnaces require condensate drain lines — plan routing before installation.
Herriman requires CO detectors on every level when gas appliances are installed.

Frequently asked questions

Do I need a permit to replace my furnace in Herriman?: Yes. Herriman requires a mechanical permit for all furnace replacements, even same-model swaps. The permit ensures proper venting, gas connections, and combustion air requirements are met.
Do I need a Manual J calculation in Herriman?: Yes, for new HVAC installations. Herriman follows the International Mechanical Code which requires a Manual J load calculation to properly size heating and cooling equipment.

Sources & verification

Key facts verified against official sources. Last reviewed 2026-06-27.

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Herriman building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

Related guides

Furnace Replacement

Get the AI compliance checklist

Upload your project scope, get a jurisdiction-specific checklist of everything you need. Coming soon.

We only use your email to send permit updates. No spam, unsubscribe anytime. Privacy.