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Aqua-Hot heater replacement systems displayed with logo for authorized service center.

Aqua-Hot Heaters | Replacement Diesel & Electric RV Heating Systems

Find Your Aqua-Hot Heater or Replacement Model

Use the filters on the left (or tap Filters on mobile) to locate your Aqua-Hot heater model. Once selected, you’ll see:

✅ Your current Aqua-Hot model — active or discontinued
🔄 Recommended replacement unit(s) — factory-approved alternatives
🔌 Required harness or pin kits — listed under “For Upgrade”

If your exact unit isn’t listed, choose the closest match to view the recommended factory replacement. Each product page includes lead time, upgrade notes, and technical specifications.

All Aqua-Hot diesel and electric hydronic heaters in this collection are OEM-grade replacements — engineered for consistent performance, quiet operation, and long service life in RVs, buses, and luxury motor coaches.

Hydronic heater with 45.0 K-BTU capacity and 12 VDC power for efficient heating.
Sale
from $8,399.99

Heater, Hydronic-D 45.0 K-BTU 12 VDC 1650 W-EL W/E-PH W- Reporter (AHE-450-DE5)

When replacing any models of AHE-450-DE4 & Older, the coach adapter harness is required.

from $8,399.99
Sale
Aqua-Hot Heater model HHE-700-07N with a 12 VDC engine preheat feature.
Sold out
$13,460.60

Aqua-Hot Heater – HH 12 VDC | Engine Preheat Model HHE-700-07N

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$13,460.60
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Aqua-Hot diesel heater model HHE-700-06N with 12 VDC power for vehicle heating systems
Sold out
$13,460.60

Aqua-Hot Heater – HH 12 VDC | Diesel Model HHE-700-06N

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$13,460.60
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Aqua-Hot Heater in black, designed for 12 VDC engine preheating replacement.
Sold out
$14,483.85

Aqua-Hot Heater – HH 12 VDC | Engine Preheat Replacement (HHE-700-05N)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$14,483.85
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Aqua-Hot heater with 12 VDC engine preheat feature, model HHE-700-04N.
Sold out
$14,244.80

Aqua-Hot Heater – HH 12 VDC Engine Preheat | Model HHE-700-04N

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$14,244.80
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12 VDC heater without engine preheat, model HHE-700-03N, compact design.
Sold out
$14,189.90

Heater, HH 12 VDC w/o Engine Preheat (HHE-700-03N)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$14,189.90
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12 VDC heater with Motoraide, featuring a compact design and durable construction.
Sold out
$13,490.65

Heater, HH 12 VDC w/Motoraide (HHE-500-06M)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$13,490.65
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12 VDC heater with Motoraide, model HHE-500-05M, designed for vehicle use
Sold out
$14,530.35

Heater, HH 12 VDC w/Motoraide (HHE-500-05M)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$14,530.35
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12 VDC heater with Motoraide, featuring a compact design and durable construction.
Sold out
$14,402.15

Heater, HH 12 VDC w/Motoraide (HHE-500-04M)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$14,402.15
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12 VDC heater with Motoraide, featuring a compact design and durable construction.
Sold out
$14,336.70

Heater, HH 12 VDC w/Motoraide (HHE-500-03M)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$14,336.70
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12 VDC heater with engine preheat feature for vehicle use, model HHE-200-06E.
Sold out
$14,613.70

Heater, HH 12 VDC w/Engine Preheat (HHE-200-06E)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$14,613.70
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12 VDC heater with engine preheat feature, designed for vehicle use.
Sold out
$15,625.10

Heater, Hh 12 VDC w/Engine Preheat (HHE-200-05E)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$15,625.10
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12 VDC heater with engine preheat function, model HHE-200-04E, compact design.
Sold out
$15,502.25

Heater, HH 12 VDC w/Engine Preheat (HHE-200-04E)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$15,502.25
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12 VDC heater with engine preheat feature, designed for vehicle use.
Sold out
$15,439.55

Heater, HH 12 VDC w/Engine Preheat (HHE-200-03E)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$15,439.55
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12 VDC heater with Motoraide, featuring a compact design and durable construction.
Sold out
$14,367.40

Heater, HH 12 VDC w/Motoraide (HHE-103-NM0)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$14,367.40
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12 VDC heater with engine preheat feature and compact design for vehicle use
Sold out
$14,367.40

Heater, HH 12 VDC w/Engine Preheat (HHE-103-E00)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$14,367.40
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12 VDC heater with Motoraide, featuring a compact design and durable construction.
Sold out
$18,109.20

Heater, HH 12 VDC w/Motoraide Newmar (HHE-102-NM0)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$18,109.20
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12 VDC heater with engine preheat for Monaco models, compact rectangular design
Sold out
$14,334.00

Heater, HH 12 VDC w/Engine Preheat Monaco (HHE-102-EMC)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$14,334.00
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12 VDC heater with engine preheat feature for Foretravel vehicles.
Sold out
$13,248.95

Heater, Hh 12 VDC w/Engine Preheat Foretravel (HHE-102-EFT)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$13,248.95
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12 VDC engine preheat heater for Fleetwood vehicles, compact design with mounting brackets.
Sold out
$13,248.95

Heater, HH 12 VDC w/Engine Preheat Fleetwood (HHE-102-EFL)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$13,248.95
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12 VDC heater with engine preheat feature, model HHE-102-E00, compact design
Sold out
$15,458.20

Heater, HH 12 VDC w/Engine Preheat (HHE-102-E00)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$15,458.20
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12 VDC heater with engine preheat feature, designed for efficient warming.
Sold out
$18,109.20

Heater, HH 12 VDC w/Engine Preheat (Original HH) (HHE-101-E00)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$18,109.20
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Aqua-Hot Hydronic Heater model 431/12 with compact rectangular design and control panel.
Sold out
$0.00

Aqua-Hot Hydronic Heater (431/12)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$0.00
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12VDC 1650W electric heater with inner coil and Motoraid for vehicle applications.
Sold out
$9,040.95

Heater,HH 12VDC 1650 W-EL Inner DW-Coil w/Motoraid (HHE-500-09M)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$9,040.95
Sold out
Heater with inner DW-coil and Motoraide, designed for 12 VDC and 1650 W power.
Sold out
$9,384.20

Heater, HH 12 VDC 1650 W-EL Inner DW-Coil w/Motoraide (HHE-500-08M)

This unit has been discontinued. Please see the replacement listed under ‘For Upgrade.’

$9,384.20
Sold out
12 VDC heater with Motoraide, model HHE-500-07M, discontinued unit shown.
Sold out
$17,175.05

Heater, HH 12 VDC w/Motoraide (HHE-500-07M)

This unit has been discontinued. Please see the replacement listed under ‘For Upgrade.’

$17,175.05
Sold out
12 VDC heater with a 1650 W output and inner dual coil design for engine use.
Sold out
$9,487.05

Heater, HH 12 VDC 1650 W-EL Inner DW-Coil w/Engine PH (HHE-200-09E)

This unit has been discontinued. Please see the replacement listed under ‘For Upgrade.’

$9,487.05
Sold out
12 VDC 1650 W heater with inner DW coil and engine PH, model HHE-200-08E discontinued unit
Sold out
$9,816.00

Heater, HH 12 VDC 1650 W-EL Inner DW-Coil w/Engine PH (HHE-200-08E)

This unit has been discontinued. Please see the replacement listed under ‘For Upgrade.’

$9,816.00
Sold out
12 VDC heater with engine preheat feature, designed for efficient warming.
Sold out
$18,303.60

Heater, HH 12 VDC w/Engine Preheat (HHE-200-07E)

$18,303.60
Sold out
12 VDC heater with two elements, designed for recon applications.
Sold out
$8,086.00

Heater, AH 12 VDC 2-Element Recon (AHE-120-03X)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$8,086.00
Sold out
12 VDC heater with two heating elements, model AHE-120-04X, in a compact design
Sold out
$8,086.00

Heater, AH 12 VDC 2-Element Recon (AHE-120-04X)

$8,086.00
Sold out
Diesel engine Model 250D with a compact design and visible control panel features.
Save $222.73
$5,722.72
$5,499.99

Model 250D (Diesel) - (AHE-250-D03)

If your unit is sold out or discontinued, choose your model to see the recommended replacement. Some upgrades also require a harness or pin kit, wh...

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$5,722.72
$5,499.99
Save $222.73
Diesel engine Model 250D with a compact design and visible control panel features.
Save $222.73
$5,722.72
$5,499.99

Model 250D (Diesel) - (AHE-250-D02)

$5,722.72
$5,499.99
Save $222.73
Compact 125D diesel hydronic heater with durable metal casing and control panel display
Save $211.38
$4,707.37
$4,495.99

125D Diesel Hydronic Ultra-Compact Hydronic Heating (AHE-125-DN2)

$4,707.37
$4,495.99
Save $211.38
Hydronic heater with 12 VDC and 110 AC, featuring a 1,000 watt heating element.
Sold out
$5,887.18

Heater, Hydronic-D 12 VDC 110 AC 1,000 Watt Element (AHE-250-D01)

$5,887.18
Sold out
Aqua-Hot Hydronic-D 12V heater with dual electric elements and integrated diagnostics.
Save $254.13
$11,854.12
$11,599.99

Aqua-Hot Hydronic-D 67.5K BTU 12V Heater (AHE-675-D04)

The Aqua-Hot Hydronic-D 67.5K BTU 12V Heater (AHE-675-D04) combines diesel and electric heating for maximum comfort and efficiency. Equipped with a...

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$11,854.12
$11,599.99
Save $254.13

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