Buying guide · 10 min read · Updated October 2, 2026

6 Best RV Water Heater For Camper Van in 2026: A Practical RV Guide

Six water heaters and mini-tank options compared for camper vans by tank size, direct-fit design, propane ignition and plug-in alternatives.

By Bowen HigginsRV Editor at RV Gear Lab6 products comparedSpec-sheet researched

Vans have little space and little power, so the water heater has to be compact, simple and easy on the battery. A direct-fit 6 gallon tank saves cutting, while a small electric mini tank suits a sink and a shore plug.

The six picks include four 6 gallon propane units, a tankless propane heater and a 2.5 gallon plug-in mini tank. Check the opening size before buying, since vans rarely have a standard cutout.

RV Gear Lab field notes

The Rig Fit Check

Start with the job: Suburban SAW6DEL 6-Gallon Direct Fit RV Water Heater leads this shortlist for Direct-fit swaps. Use that fit as a reference point, then compare the alternatives against your own space and workload.
Specs that separate the picks: The first details to compare are 6 gallon direct fit DSI, 6 gallon propane DSI. Confirm the exact model and included components before ordering.
Trade-off to plan for: Larger than a van-sized cabinet may allow

Before you buy

What Matters Before You Choose an RV Water Heater For Camper Van

Key buying criteria so you get the right fit the first time.

01
Fit and space
Vans have no standard cutout, so the heater must fit the space you have. Direct-fit Suburban models claim no cutout changes in a matching opening. Measure first.
02
Fuel choice
Propane works off-grid and an electric mini tank needs shore power. Pick by how you camp. Check the fuel.
03
Battery draw
A tankless heater draws 12 volts for the fan, and a tank heater needs only ignition power. A small van battery favors a tank. Check the draw.
04
Tank size
A 6 gallon tank suits two people, and a 2.5 gallon unit covers a sink. Size to your use. Check the capacity.
05
Venting
Propane heaters need venting and gas connections. Vans are tight, so check clearances. Follow the manual.
06
Brand listing detail
Atwood WH-6GA has little detail on its listing. Confirm specs with the maker before buying. Check the fit.

Our standards

Why You Can Trust RV Gear Lab

At RV Gear Lab, we compare products based on rig fit and power or hookup compatibility, verified specifications, usability, setup requirements, weight, durability, and real-world trade-offs. We do not rank products purely on marketing claims or commission rates.

We have not personally tested every product listed. Where hands-on testing is not available, recommendations are based on verified manufacturer specifications, product documentation, use-case fit, and comparative research.

How we review RV gear →

Detailed reviews

The 6 best rv water heater for camper van, explained

Best Overall · 1 of 6

Suburban SAW6DEL 6-Gallon Direct Fit RV Water Heater

6 gallon direct fit DSI
No cutout modifications
Porcelain-lined tank

Check price on Amazon

Best for: Direct-fit swaps

Our take

It is the best match for van or RV owners replacing a 6 gallon aluminum tank without modifications.

Why it made the shortlist

Suburban SAW6DEL is a 6 gallon direct fit steel tank heater with direct spark ignition. The listing says it needs no cutout, cabinet depth or plumbing modifications and has a porcelain-lined tank with a replaceable anode rod.

Against Suburban SAW6D, it is the version with the L designation and a higher price. Against KINGRVER 6 DSI, it is a Suburban direct fit.

Buyers focused on direct-fit swaps will find it a sensible match.

What works

Direct fit with no modifications
Porcelain-lined steel tank
Replaceable anode rod
Direct spark ignition

Watch out for

Larger than a van-sized cabinet may allow

Check price on Amazon

Best Value Suburban · 2 of 6

Suburban SAW6D 6-Gallon Direct Fit RV Water Heater

6 gallon direct fit DSI
No cutout modifications
Replaceable anode rod

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Best for: Budget direct fit

Our take

It suits owners who want the direct fit at a lower price.

Why it made the shortlist

Suburban SAW6D is a 6 gallon direct fit tank heater with direct spark ignition. It shares the same porcelain-lined tank, replaceable anode rod and no-modification fit.

Against Suburban SAW6DEL, it costs less. Against Atwood WH-6GA, it is a Suburban direct fit.

It earns its slot for budget direct fit.

What works

Direct fit with no modifications
Porcelain-lined tank
Replaceable anode rod

Watch out for

Still large for a van
Needs propane plumbing

Check price on Amazon

Best Propane Tank with Controls · 3 of 6

KINGRVER 6 Gallon RV Tank Water Heater

6 gallon propane DSI
3 temperature levels
12V DC ignition

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Best for: Simple propane controls

Our take

It suits owners who want propane with simple temperature settings.

Why it made the shortlist

KINGRVER 6 Gallon DSI is a propane tank heater designed for most 4 to 6 gallon cutouts, with 12 volt DC ignition from the RV system. The listing says the controller offers three temperature levels and the unit needs about 3 inches of added clearance.

Against Suburban SAW6D, it has a controller with three temperature levels. Against ERFEI, it uses propane.

It is a natural fit for simple propane controls.

What works

Three temperature levels
12V DC ignition
Fits most 4 to 6 gallon cutouts

Watch out for

Needs 3 inches of added clearance
Check venting and cutout fit

Check price on Amazon

Best Known Name · 4 of 6

Atwood

6 gallon Atwood Dometic WH-6GA
Model 94001BP
RV water heater

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Best for: Like-for-like swaps

Our take

It suits owners replacing an Atwood or Dometic 6 gallon tank like for like.

Why it made the shortlist

Atwood and Dometic WH-6GA 94001BP is a 6 gallon RV water heater. The listing gives few details beyond the model.

Against Suburban SAW6D, it is a competing 6 gallon brand. Against KINGRVER 6 DSI, it is an established model number.

Think of it as the pick for like-for-like swaps.

What works

Known RV brand
Like-for-like replacement for the same model
6 gallon capacity
Widely stocked

Watch out for

Listing has very little detail
Check fit against your old model

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Best Compact Tankless · 5 of 6

MapleGrace RV Water Heater

55,000 BTU propane tankless
CSA certified per title
Front outlet

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Best for: Van outdoor showers

Our take

It suits vans that want hot water on demand and an outdoor shower.

Why it made the shortlist

MapleGrace is a 55,000 BTU propane tankless heater listed as CSA Certified, with a forced exhaust fan and a 95 to 123 degree F digital control. It has an exterior front outlet for outdoor use.

Buyers focused on van outdoor showers will find it a sensible match.

What works

Listed as CSA certified
Forced exhaust fan
Front outlet for outdoor use

Watch out for

Needs 12V power to run
No flow stated with a temperature rise

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Best Plug-In Sink Heater · 6 of 6

ERFEI 2.5 Gal Water Heater Electric

2.5 gallon, 1500W, 110V
LED digital display
Stainless steel tank

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Best for: Shore power sink hot water

Our take

It suits vans on shore power that need hot water at the sink.

Why it made the shortlist

ERFEI 2.5 Gallon is a 1500 watt, 110 volt mini tank with a stainless steel inner tank and an LED temperature display. The listing says it heats a sink for an RV or camper and uses a standard plug.

Against the propane heaters, it needs shore power.

It earns its slot for shore power sink hot water.

What works

LED temperature display
Stainless steel inner tank
Standard plug

Watch out for

Needs shore power or a large inverter
Too small for showers

Check price on Amazon

Methodology

How We Built This Shortlist

Each pick was assessed across 5 criteria weighted for real-world use.

Space and fit

We compared direct-fit claims and opening sizes.

Fuel

Propane, electric and 12 volt needs were compared.

Tank or tankless

Reserve tanks and on-demand units were compared.

Controls

Temperature levels and displays were compared.

Certifications

Certifications were repeated only where listed.

Decision guide

Match an RV Water Heater For Camper Van to Your RV

By Van Setup

Your situation	Recommended pick	Why
Direct-fit swap	Suburban SAW6DEL	No cutout modifications.
Lower-cost direct fit	Suburban SAW6D	Same fit, lower price.
Propane with controls	KINGRVER 6 DSI	3 temperature levels.
Tankless, outdoor shower	MapleGrace 55K	Front outlet.
Shore power sink	ERFEI 2.5 Gal	Plug-in mini tank.

By Budget

Budget	Recommended pick
$90 to $150	ERFEI 2.5 Gal or MapleGrace 55K
$420 to $480	KINGRVER 6 DSI or Atwood WH-6GA
$550 to $640	Suburban SAW6D or Suburban SAW6DEL

Tank Heater vs Mini Tank

Tank heater

Suburban SAW6DEL, Suburban SAW6D, KINGRVER 6 DSI and Atwood WH-6GA are 6 gallon propane tanks.

Mini tank

ERFEI 2.5 Gal is a plug-in sink heater that needs shore power.

Most van owners with propane should choose Suburban SAW6D, and ERFEI 2.5 Gal only on shore power.

By Budget

Budget	Recommended pick
Lowest cost	ERFEI 2.5 Gal
Low cost tankless	MapleGrace 55K
Mid cost tank	KINGRVER 6 DSI
Higher	Suburban SAW6DEL

For Compact Van Builds Specifically

Look for

A compact fit and propane ignition, as on Suburban SAW6D.

In this comparison

Suburban SAW6D lists no cutout modifications. Measure your space, and follow the manual for venting.

When to Spend More

Spend more if

Spend more on Suburban SAW6DEL for the direct fit.

Save if

Save with ERFEI 2.5 Gal or MapleGrace 55K for sink or tankless needs.

FAQ

Before You Bring One Home

Do I need a special heater for a van?

One that fits your space. Suburban SAW6D lists a direct fit.

What is the common van heater mistake?

Ignoring venting clearance. Follow the manual.

Is Suburban worth more than KINGRVER?

For the direct fit and brand, yes. KINGRVER 6 DSI adds temperature levels.

How much battery does a heater use?

Tank heaters use little for ignition. Tankless units draw more for the fan.

Can I use the ERFEI off-grid?

Not without a large inverter. It needs 110V power.

Bottom line

The short version

Best Overall
Suburban SAW6DEL 6-Gallon Direct Fit RV Water Heater
Check price for Suburban SAW6DEL 6-Gallon Direct Fit RV Water Heater (opens in a new tab)
Best Value Suburban
Suburban SAW6D 6-Gallon Direct Fit RV Water Heater
Check price for Suburban SAW6D 6-Gallon Direct Fit RV Water Heater (opens in a new tab)
Best Propane Tank with Controls
KINGRVER 6 Gallon RV Tank Water Heater
Check price for KINGRVER 6 Gallon RV Tank Water Heater (opens in a new tab)
Best Known Name
Atwood
Check price for Atwood (opens in a new tab)
Best Compact Tankless
MapleGrace RV Water Heater
Check price for MapleGrace RV Water Heater (opens in a new tab)
Best Plug-In Sink Heater
ERFEI 2.5 Gal Water Heater Electric
Check price for ERFEI 2.5 Gal Water Heater Electric (opens in a new tab)

Browse more rv water heater for camper van on Amazon →

About the author

Bowen Higgins

RV Editor at RV Gear Lab

Bowen covers RV power, water systems, towing and leveling, upkeep and interior comfort, with a focus on matching gear to the rig, the hookups and the way you actually travel.

6 Best RV Water Heater For Camper Van in 2026: A Practical RV Guide

Our top picks

The Rig Fit Check

What Matters Before You Choose an RV Water Heater For Camper Van

Fit and space

Fuel choice

Battery draw

Tank size

Venting

Brand listing detail

Why You Can Trust RV Gear Lab

The 6 best rv water heater for camper van, explained

Suburban SAW6DEL 6-Gallon Direct Fit RV Water Heater

Suburban SAW6D 6-Gallon Direct Fit RV Water Heater

KINGRVER 6 Gallon RV Tank Water Heater

Atwood

MapleGrace RV Water Heater

ERFEI 2.5 Gal Water Heater Electric

How We Built This Shortlist

Space and fit

Fuel

Tank or tankless

Controls

Certifications

Match an RV Water Heater For Camper Van to Your RV

By Van Setup

By Budget

Tank Heater vs Mini Tank

By Budget

For Compact Van Builds Specifically

When to Spend More

Before You Bring One Home

Do I need a special heater for a van?

What is the common van heater mistake?

Is Suburban worth more than KINGRVER?

How much battery does a heater use?

Can I use the ERFEI off-grid?

The short version

Bowen Higgins

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