Heat Strips

Add dependable auxiliary warmth with our heat strips and electric heat kits, the simple way to add auxiliary heat to air handlers and package units at budget-friendly prices.

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Heat Strips

Built for licensed contractors, property managers, light commercial jobs, and capable homeowners, these field-installed electric resistance heaters fit compatible air handlers or package units to deliver backup/emergency heat for heat pumps, boost capacity in mild climates, or replace aging kits. With deep inventory and everyday low pricing from $15-$299, you can keep projects on schedule and on budget.

Sizing is by kilowatts-choose from 3kW, 4kW, 5kW, 6kW, 7kW, 7.2kW, 7.5kW, 8kW, 9kW, and 10.4kW. For load comparison, 1 kW ≈ 3,412 BTU/hr. Tonnage, SEER2, HSPF2, and refrigerant do not apply to resistance heat; instead, match kW to the heat demand and blower capacity. Models are offered for “Operating Mode: Cool Only with Electric Heat” or “Operating Mode: Heat Pump,” with single- or multi-stage control depending on your thermostat and control board.

Compatibility is brand- and model-specific. Shop by manufacturer subcategories including Amana, Bard, Bosch, Bryant/Payne, Carrier, Daikin, DiamondAir, Goodman, GREE, Haier, ICP, Janitrol, Lennox, Nordyne/Miller/Intertherm/Tappan, Rheem, Ruud, Trane/American Standard, and York/Fraser Johnston/Luxaire/Coleman. Always verify voltage, phase, and breaker requirements on the unit nameplate, and have a licensed HVAC/electrical professional perform the installation.

Top Brands for Heat Strips

We stock leading options from Carrier, Bard, and Comfortmaker, plus a wide selection across other major brands to ensure the right fit and fast turnaround.

Frequently Asked Questions

  • What kW heat strip size do I need for my air handler or package unit?

    Match kW to your heat load and blower capacity. As a guide, many mild climates use about 1.5-2.5 kW per ton; confirm with a Manual J and unit specs.

  • Are these heat strips compatible with heat pump systems for auxiliary/emergency heat?

    Yes. Choose a Heat Pump application kit and pair it with a thermostat that supports AUX/E heat and proper staging.

  • Do I need a dedicated electrical circuit and what breaker/wire size is required for a given kW?

    Usually yes. Follow the kit’s nameplate MCA/MOP and local code for breaker and conductor size. Professional electrical installation is required.

  • Which brands of heat strips are compatible with my existing air handler model?

    Use brand- and model-specific kits. Cross-check your air handler or package unit model number with the listed compatible heat kit part numbers.

  • Can a homeowner install a heat strip, or is a licensed electrician/HVAC tech required?

    Because of high amperage and code requirements, installation should be performed by a licensed HVAC/electrical professional.

  • How do operating modes like “Cool Only with Electric Heat” differ from “Heat Pump” applications?

    Cool Only kits provide electric heat without heat pump integration. Heat Pump kits stage with defrost/aux controls for proper backup heating.

  • What thermostat settings or controls are needed to enable auxiliary heat strips?

    Use a compatible heat pump thermostat with AUX/E terminals. Enable staging and temperature lockouts as recommended by the equipment manufacturer.

  • How do I replace an old heat kit-what measurements and model numbers should I match?

    Match the air handler model, kW rating, voltage/phase, breaker size, and mounting/plug style. Verify dimensions and wiring harness compatibility.

  • Do heat strips affect SEER2 or use refrigerant?

    No. SEER2/HSPF2 apply to compressor operation. Electric strips use no refrigerant and do not change those ratings-they add electric resistance heat.

  • Are heat strips suitable for light commercial applications?

    Yes, when matched to the unit’s voltage/phase and controls. Verify capacity, electrical requirements, and clearances for the specific application.

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