HVAC Rough In



  • Roof bracing not damaged or removed during HVAC ROUGH IN
  • All HVAC return airs sealed
  • Check location of registers and check size, locations, and total number of registers
  • Confirm ducts run to every room per blueprint design
  • Confirm that no ducts are laying on joists. The ducts should be suspended from the rafters to ensure that the insulation can be put underneath them and will ensure proper airflow.
  • Confirm that the primary drainline has been securely installed into a plumbing drain with proper fall to allow water to drain unrestricted.
  • Make sure during hvac rough in that the primary drain line has not been run to a pedestal sink as you can typically notice the drain hanging out from the back.
  • The secondary drain line is run through the soffit at a 90 degree angle and centered over a window. Make sure it is over a window and not over a doorway. Check the line in the attic for proper fall to prevent backup and leaking in the attic. This is important to prevent backup and potential water leak damage in the future.
  • Confirm that during the HVAC Rough in that the hvac contractor tapes the plenum (air handler) with metal tape to prevent leakage of air and decreased energy efficiency.
  • Make sure no ducts are installed over fireplaces, attic ladders, or attic access holes that could restrict access or cause other potential hazards (trip, fire, access)
  • Check that the feed line from the compressor to the house is insulated with at minimum 3/4″ rubber flex and securely taped.
  • Make sure no registers are below joists.
  • Confirm register are not in the way of future light fixtures, fans, or other architectural design features.
  • Confirm HVAC ducts are supported at minimum every 4 feet.
  • If required, combustion air is also installed at this stage
  • Plumber/HVAC contractor to connect gas line to horizontal unit in attic at this time.
  • If responsible and applicable, make sure dryer vent is connected at this time.
  • And one of the most important items to check is the capacity of the system installed for your home. Make sure the unit size corresponds with the square footage of the area it will be cooling. Make sure they are responsible for proper sizing of the unit that will result in a minimum 20 degree drop in temperature.