What Utah Builders Should Expect From an HVAC Rough-In Inspection

A failed rough-in inspection costs more than a re-trip fee. It holds up insulation, drywall and every trade behind them. Here is what should be right before you call for inspection on a new home.

1. Load calculations on site

Utah follows the International Residential Code, which requires heating and cooling equipment to be sized using ACCA Manual J and Manual S, and ducts designed with Manual D. Have the reports with the approved plans.

2. Duct supports and sealing

Ducts must be supported at the right spacing, joints sealed with mastic or listed tape, and flex duct pulled tight without sharp bends or crushing.

3. Clearances and fire blocking

Vents, flues and appliances need their listed clearances to combustibles. Penetrations through fire-rated assemblies must be sealed with the correct material.

4. Gas piping

Correct pipe sizing for the total connected load, proper supports, sediment traps where required, and a pressure test at the value the inspector expects.

5. Combustion air and venting

Venting routed per the manufacturer's instructions with correct slope, terminations located away from openings, and combustion air provided where the appliance requires it.

6. Condensate and exhaust

Condensate lines sloped and terminated correctly; bath and kitchen exhaust fans ducted to the exterior, never into the attic.

Before you call for inspection

Use this list before you call for the rough-in inspection. Request a bid or call (385) 307-8871.