Residential HVAC Rough-In Walk-Through Inspection

Pre-drywall inspection template for verifying residential HVAC rough-in, including duct runs, register and return locations, equipment placement, venting, support, and code/manufacturer compliance before walls are closed.

Inspection Details and Reference Documents

• Project address, lot/unit, and inspection date recorded
• Approved mechanical plans and permit set available on site
• Installation verified against manufacturer instructions and AHJ requirements

Equipment Location and Clearances

• Air handler, furnace, or indoor unit set in approved location
• Required service clearances maintained around equipment
  Verify access for filter replacement, coil service, burner service where applicable, and panel removal.
• Equipment platform, hanger, or support is secure and level
• Refrigerant line set and condensate routing are protected and routed without damage risk

Ductwork Layout, Sizing, and Support

• Supply and return duct runs match approved layout
• Duct sizing appears consistent with design and branch takeoffs
  Check main trunks, branch ducts, and transitions for obvious undersizing, crushing, or unapproved reductions.
• Ducts are properly supported and hung at appropriate intervals
  Look for secure straps, hangers, and support at joints, offsets, and long horizontal runs.
• Duct joints, seams, and connections are sealed and mechanically fastened
• Flexible duct runs are not kinked, crushed, or excessively stretched

Registers, Returns, and Vent Terminations

• Supply register locations match plans and room layout
• Return air openings are correctly located and unobstructed
• Bath, kitchen, dryer, or other exhaust vent terminations are routed to approved exterior locations
  Verify terminations are not blocked, damaged, or terminating in prohibited locations.
• Registers, grilles, and boots are securely installed and aligned

Combustion Air, Venting, and Safety Provisions

• Combustion air openings or ducts provided where required
• Flue venting is routed, supported, and connected per approved design
• Vent penetrations are properly sealed and clear of combustible interference
  Verify clearances to framing, insulation, and other materials per manufacturer instructions and applicable code.
• Condensate drain slope and trap arrangement are installed correctly

Pre-Drywall Readiness and Sign-Off

• No open deficiencies that would be concealed by drywall
• Required photos captured for rough-in verification
• Inspector or competent person signature completed