Important! Rocky Mountain Power's planned changes to the incentives and equipment qualifications associated with our energy efficiency program will become effective October 24, 2014. For questions or additional clarification, please email

Duct Sealing and Duct Insulation

duct sealing

Get up to $300 cash back

Don’t let energy slip through the cracks

Be wattsmart and save on duct sealing and duct insulation. When energy is lost through duct surfaces, heating and cooling equipment has to work harder to make up for the loss. As a result, you could be spending too much money to maintain comfort. Duct sealing and duct insulation can cut those heating and cooling costs by 30 percent.

Qualifications & Incentives

Services Customer Incentive

Duct sealing for homes with electric heating only


Duct sealing & duct insulation for homes with gas heat and electric cooling


Duct sealing & duct insulation for homes with electric heat

  • Home must have an electric heating system or an electric cooling system serving at least 80% of the home’s conditioned floor area
  • Electrically heated home incentives apply to houses with a permanently installed ducted electric furnace or heat pump
    • Homes with an electric heating system and a central air conditioner will qualify for the electrically heated home incentive only
  • Electrically cooled home incentives apply to houses with a permanently installed ducted electric central air conditioner and a non-electric (gas, oil or propane) heating system

Duct sealing:

  • Work must be completed by either a Participating or Qualified HVAC Contractor
  • Incentive available in electrically heated home only
  • Duct systems with previously installed insulation greater than R-2 are eligible for incentive
  • Minimum of 10 linear feet of exposed ductwork in an unconditioned space
  • CAZ testing is required
  • All physically accessible ducts located in unconditioned space must be sealed according to program requirements outlined in the Duct Sealing worksheet and Utah HVAC Trade Ally Program Manual

Duct sealing and duct insulation

  • Work must be completed by a Participating or Qualified Contractor. Please review our tips for hiring a contractor.
  • Duct sealing and duct insulation services must be performed at the same time to qualify.
  • Incentive available on existing ductwork only. Existing ductwork must be located in an existing home. Newly installed ductwork does not qualify for an incentive.
  • Ducts must be located in an unconditioned space. Definition of unconditioned space- an unconditioned space is any space outside of the thermal envelope of the building that is not intentionally heated for occupancy.
  • Minimum of 10 linear feet of exposed ductwork. All exposed ductwork must be sealed and insulated (ductwork only, not venting).
  • Home must have an electric heating system or a central air conditioner serving 80 percent of the floor area.
  • Participating or Qualified Contractor is required to perform Combustion Appliance Zone (CAZ) testing, duct leakage testing and seal ducts with mastic.
  • Duct sealing must reduce duct leakage to outside by 50 percent with a 100 CFM (Cubic Feet per Minute) minimum reduction.
  • Duct insulation must be installed after ducts are sealed. Ductwork must be insulated to a minimum of R-8. Pre-existing insulation must be non-existent or less than R-2.
  • Participating or Qualified Contractor must complete a program Duct Sealing and Insulation Worksheet.
  • Incentives are limited to one duct sealing incentive per duct system for the lifetime of the home.
  • Incentive Application and required documents must be postmarked within 90 days of completed service.

Conditioned vs. unconditioned space - clarification notes

For the most part, basements are conditioned spaces. Basements are not usually thermally isolated from the main living area and contain space conditioning ducts. Basements are also used for storage and frequently contain laundry facilities and other living spaces. Ducts serving unfinished basements are not always equipped with dedicated supply registers, although single registers at plenums are not unusual.

An unconditioned basement would have these properties: Thermally isolated from the main floor by insulation in the floor. Insulated, weather-stripped door (if above floor plane) and insulated stairwell walls where thermal plane penetrates floor, air sealed (caulked, foamed penetrations) wiring plumbing, sealed duct penetrations and sealed, insulated ducts. No supply registers.

While a crawl space is unconditioned space, the floor must be insulated prior to or at the same time ducts are sealed and insulated to thermally isolate the crawlspace. Failure to do this will increase the heating load of the home and potentially cause comfort issues.

Customer Eligibility

Residential electric customers residing in the state of Utah who purchase their electricity from Rocky Mountain Power on rate schedules 1, 2, or 3 qualify. Landlords who own rental properties served by the company in the state of Utah where the tenant is billed on rate schedules 1, 2 or 3 also qualify for this program. You can locate your rate schedule on your bill or by calling 1-888-221-7070. Incentive checks are only issued in the name of the Rocky Mountain Power account holder.

How to Apply

Prior to starting a project, find a contractor using the Qualified HVAC Contractor list. Note that select incentives must be completed by a Qualified Contractor. Review the Incentive Application with your contractor to determine eligibility requirements, incentive qualifications and review the list of required documents to submit for an incentive.

Incentive Application and required documents must be postmarked within 90 days of the work completed date. Incentive checks are issued within 45 days of receipt of the completed and approved Incentive Application. Checks are only payable to the account holder or verified third party payee. Incentives are not to exceed the purchase price of the equipment or service. Equipment and service work may be inspected for compliance. Incentives are subject to tariff approval and may change with 45 days notice. Additional terms and conditions may apply.

Visit our Frequently Asked Questions page for questions regarding trade allies or how to receive your incentive.