Defender owners who run a full cab all winter know how fast a cold windshield fogs up. The Firestorm HT_CU_448 uses the Defender's engine coolant to make up to 18,000 BTU of heat, with two defrost vents for the glass and separate vents for driver and passenger. Brackets and hose lengths are made for the 2017-2025 Defender.
What It Does for a Defender
- Up to 18,000 BTU of coolant-fed heat with fan speed from 0 to 125 CFM.
- Two defrost vents, plus dedicated driver and passenger vents.
- Hidden install with no visible heater core.
- Shutoff valve for summer.
- Adjustable temperature setting and fan speed from the cab.
Winter Tips for Defender Owners
- Run defrost first on frosty mornings, then switch to the cab vents.
- Check coolant level after the first few rides.
- Close the shutoff valve in summer.
Firestorm Heater Specifications
- Heat output: up to 18,000 BTU from the engine coolant, with airflow from 0 to 125 CFM
- Adjustable temperature and fan speed, with 360-degree adjustable vents
- Dedicated driver and passenger vents, plus two defrost vents aimed at the windshield
- Built-in shutoff valve to close off coolant flow in warm weather
- Automotive-grade radiator hose rated from -40 to 120 degrees C
- High-performance alloy radiator Y connectors
- No visible heater core, for a factory-installed look
Fitment
| Year | Make | Model |
|---|---|---|
| 2017-2025 | Can-Am | Defender |
What's in the Box
- Firestorm heater unit with fan, temperature and fan-speed controls
- Driver, passenger and two defrost vents
- Brackets and hose lengths made for the Can-Am Defender
- Automotive-grade radiator hose and alloy radiator Y connectors
- Built-in coolant shutoff valve
- All installation hardware and instructions
Who It's For and What Pairs Well
This heater is for Defender owners on farms, ranches and job sites through the winter. Close in the cab with a Defender windshield, roof and doors, and add a Denali Defender snow plow kit.
Installation Notes
Installation ties into the Defender's coolant lines with the included hose and alloy Y connectors. Follow the HT_CU_448 PDF, refill coolant, and bleed air from the system before the first ride. Check hose clamps again after a few heat cycles.
- source:
- motoalliance
- ma_url:
- https://www.motoalliance.com/firestorm-cab-heater-defender
- desc_status:
- written_2026-10-27
- ma_parts:
- HT_CU_448 $339.99
