3 Phase Heat Strips

Get reliable, budget-friendly heat on demand with our in-stock selection of 3 phase heat strips. These OEM-style electric heat kits add or restore heat in air handlers and package units, and serve as dependable emergency heat for heat pumps.

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3 Phase Heat Strips

Built for light commercial and large residential applications, 3-phase electric heat strips provide clean, immediate heat using cabinet-specific kits that mount in compatible air handlers or package units. Choose from kW sizes including 5kW, 8kW, 10kW, 15kW, 18kW, 20kW, 30kW, 40kW, 45kW, and 60kW to match building load, airflow, and electrical capacity. Whether you are adding electric heat, replacing a failed assembly, or setting up supplemental/emergency heat for a heat pump, we stock solutions priced right from $210 to $742.

Contractors, property managers, and DIY-capable owners will find straightforward, cabinet-matched kits designed for quick, professional installation. Typical kits include factory controls such as sequencers, high-limit safeties, and terminal blocks; select models feature staged elements. Use cases range from apartment and retail build-outs to equipment changeouts where electric heat is needed seasonally or as backup.

Specs note: SEER2 and HSPF2 do not apply to resistance heat strips. Output is measured in kW (approx. 3,412 BTU per kW) rather than AC tonnage or compressor BTU ratings, and refrigerant type is not involved because strips heat air directly. Always confirm your air handler’s approved heat kit list, available CFM, and electrical ratings before choosing a higher kW option.

Top Brands for 3 Phase Heat Strips

We stock brand-matched kits from Daikin and Rheem for dependable fit, proper controls integration, and code-compliant performance in compatible air handlers and package units.

Frequently Asked Questions

  • How do I choose the correct kW size heat strip for my 3-phase air handler?

    Match building heat load, approved kit list, blower CFM, and electrical capacity. As a guide, 1 kW ≈ 3,412 BTU.

  • Are these 3-phase heat strips compatible with my Daikin or Rheem air handler?

    Yes-select the model listed by the manufacturer for your exact air handler or package unit cabinet.

  • What electrical requirements and breaker sizes are typical for 3-phase heat strips?

    Refer to the unit nameplate and kit documentation for amp draw, wire size, and breaker protection per NEC.

  • Can a heat strip be used as emergency heat with a heat pump system?

    Yes. Heat strips commonly provide supplemental and emergency heat, controlled by the thermostat and defrost board.

  • Do I need a licensed electrician or HVAC contractor to install a 3-phase heat kit?

    Yes. Professional installation is required for safety, warranty compliance, and local code adherence.

  • What are the differences between 5kW, 10kW, 15kW, and higher kW heat strips?

    Higher kW delivers more heat and draws more amps: 5kW ≈ 17,060 BTU; 10kW ≈ 34,120; 15kW ≈ 51,180.

  • Are additional relays or wiring harnesses required for certain air handler models?

    Some models need specific relay kits or harnesses; check the included components and your unit’s instructions.

  • How do I verify that my control board and airflow can support a higher kW heat kit?

    Confirm approved kits, blower CFM, and control outputs in the OEM manual before upsizing kW.

  • Do SEER2 or refrigerant type matter for electric heat strips?

    No. SEER2 and refrigerant apply to compressors. Strips are resistance heat measured in kW.

  • Are these kits in stock and ready to ship?

    Most popular Daikin and Rheem sizes are in stock for fast fulfillment; specialty sizes may vary.

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