The Red Dot R-254-4P Auxiliary Heater is one of the most versatile and maintenance-free heaters Red Dot has produced. Designed with a round tube-and-fin heat exchanger, this unit can be mounted in virtually any position using multi-position leg brackets or a flush-mount frame, making it adaptable to a wide range of vehicle layouts.
Despite its compact size, the R-254-4P delivers dependable performance with 16,000 BTU/hr of heating capacity and airflow rated at 150 CFM. The single-fan design provides consistent heat distribution while keeping electrical demand low, making it well suited for 12V systems in heavy-duty and vocational vehicles.
With simple plumbing, 5/8-inch heater hose fittings, and a floor-exit configuration, the R-254-4P integrates easily into existing coolant systems. Its lightweight construction and proven Red Dot durability make it an excellent choice for OEM replacement or custom auxiliary heating installations.
Product Specifications
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Manufacturer: Red Dot
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Model Number: R-254-4P
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Voltage: 12V DC
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Heating Capacity: 16,000 BTU/hr @ 150°F
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Air Flow: 150 CFM
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Fan Configuration: Single fan
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Heater Hose Fittings: 5/8 in.
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Mounting Configuration: Floor exit
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Heat Exchanger Design: Round tube and fin
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Weight: 7.0 lbs (3 kg)
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Product Type: Heater Only
Cross Reference Numbers
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Texas Truck A/C: 950-3500-2-12
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AirSource – MEI: 44837
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CoolStar – MEI: 997-9803
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Primatech: PTAC10-9803
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Red Dot Aftermarket: R-254-4
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Truck Air – MEI: 50-9803
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TruckAC+: T3989
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TTA/C: 90-254-4
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Western Star: 60101-3407
Interchange Numbers
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10-9803
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232-7837
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25012413
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2RD4105
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4379-R2544
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4379-R2544P
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4379-RD2544P
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60101-3407
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R-254-4P
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RDH R254 4
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RDHR2544P
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RDTR2544P
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