Overview
Choose BU-1000-5-12 when you want a compact, quiet bottom-exit heater that’s easy to mount. The dual-fan module pushes warm air efficiently, while the adjustable feet help you align height and bolt pattern during install. The bottom-exit core keeps plumbing tidy under seats or along floors.
Key Features
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Heat / Airflow: 30,000 BTU/hr, 225 CFM, 2 speeds.
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Electrical: 12 VDC, ~6.8 A operating draw.
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Plumbing: Bottom-exit heater core; 5/8″ hose connections (x2).
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Mounting: 1/4-20 threaded holes (x4) on a 2.75″ × 2.75″ pattern; feet mount in 4 positions; height adjusts 6.45″–7.35″.
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Finish: Black powder-coat steel cabinet.
Dimensions & Mounting
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Overall length: 16.02″; face width: ~17.12″ across the mounting.
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Face holes: Ø0.31″ (x4); mount threads: 1/4-20 (x4).
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Hose stubs: 5/8″ OD (bottom-exit).
Wiring
Two-speed fan harness with labeled leads (LOW/HIGH and grounds) per the wiring schematic.
Service Parts (major items)
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Dual fan guards (120 mm) (x2)
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Dual DC fans (x2)
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Bottom-exit heater core
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Mounting feet (x2)
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Front housing & side panels
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Foam strips and hardware
(See exploded view and item list for callouts.)
Specifications
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Model: BU-1000-5-12
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Type: 12V cab heater, bottom exit, dual fan, 2-speed
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Heat Output: 30,000 BTU/hr @ 100° air-rise
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Airflow: 225 CFM
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Electrical: 12 VDC, ~6.8 A
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Hose Connections: 5/8″ (x2)
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Mounting Pattern: 2.75″ × 2.75″, 1/4-20 threads
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Finish: Black powder-coat
Applications
Ideal for heavy truck, ag, construction, and specialty equipment needing a compact 12V heater with bottom-exit plumbing and simple, adjustable foot mounting.
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