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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 $8,599.99

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.   ⚠️ Manufacturer Special Order – Final SaleThis produ...

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from $8,599.99
Sale
Hydronic heater with a 45.0 K-BTU capacity and 12 VDC power, featuring a digital display.
Save $127.72
$7,327.71
$7,199.99

Heater, Hydronic-D 45.0 K-BTU 12 VDC 1650 W-EL W-Reporter (AHE-400-D02)

⚠️ Manufacturer Special Order – Final SaleThis product is ordered directly from the manufacturer and is non-returnable.By purchasing this item, you...

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$7,327.71
$7,199.99
Save $127.72
Aqua-Hot Hydronic-D 60K BTU 12V heater with dual electric elements for efficient heating.
Save $226.92
$11,226.91
$10,999.99

Aqua-Hot Hydronic-D 60K BTU 12V Heater (AHE-600-D04)

The Aqua-Hot Hydronic-D 60,000 BTU 12V Heater (part AHE-600-D04) delivers high-efficiency diesel heating and continuous hot water for RVs, buses, a...

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$11,226.91
$10,999.99
Save $226.92
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
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$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.
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$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.
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$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 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
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$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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