Look for the following general requirements for HVAC installed in attics:

  • Hatch minimum 22.5 X 30 inches or large enough for appliance removal;
  • Room ventilation fans that terminate in the attic (especially under insulation);


Attic-mounted HVAC equipment:

  • Light w/switch at hatch;
  • 24-inch wide (unimpeded) walkway;
  • Appliance max. 20 ft. from hatch;
  • 30-inch wide platform all the way around the appliance;
  • Appliance disconnect within sight;
  • Drip pans with proper discharge and overflow; and

•  Proper condensate disposal.