Can Xtreme RV Basement and Boat Bilge Heater Be Installed Upside Down Or Sideways In Compartment?
Updated 10/16/2025 | Published 09/30/2025
Question:
Can I mount the XH67FR upside down under the battery tray in my camper’s compartment?
asked by: Chera
Expert Reply:
Absolutely, Chera. One of the nice design features of these Xtreme heaters like 400w # XH67FR is that they can be mounted in any orientation - sideways, upside down, or flat - and the forced-air fan still circulates heat effectively. Just be sure the thermostat on the back has access to the same air it’s heating, so it knows when to cycle off at 55°F. I’d avoid putting it too close to battery chargers or in a spot where it could get splashed.
Are you trying to protect just your batteries, or plumbing lines too?
(click to enlarge)
Product Page this Question was Asked From
Xtreme Heaters RV Basement and Boat Bilge Heater with Quick-Release Bracket - Small - 400 Watts
- RV Heaters
- Electric Heater
- 110 Volts
- Winterization
- 5th Wheel
- Motorhome
- Travel Trailer
- Xtreme Heaters
more information >
Featured Help Information
Instructions
Continue Researching
- Shop: Xtreme Heaters RV Basement and Boat Bilge Heater with Quick-Release Bracket - Small - 400 Watts
- Shop: Buyers Products 8" Wheel Chocks with 3' Rope - Rubber - Qty 2
- Q&A: Availability Of Furnace That Runs On Propane and Electricity for 2021 StarCraft Autumn Ridge 20FBS
- Q&A: Replacement Toilet Base Seal for a Dometic 510 RV Toilet
- Q&A: Can A Space Heater Protect My RV Fresh And Gray Water Tanks ?
- Q&A: Is It Safe To Leave Xtreme 400w Heater Plugged In All Winter In Boat or RV?
- Q&A: Will 800w Heater Work In RV Pass-Through Storage Bay To Keep Plumbing And Lithium Batteries Warm?
- Q&A: Which Heater Is Best To Keep Bilge From Freezing During Winter On 34 Foot Carver Cruiser Boat
- Q&A: Finding Circuit Breakers for Progressive Dynamics Panel part # PD4135K
- Article: How Does an RV Water Pump Work?
- Article: RV Propane 101: How Does My RV's Propane System Work?
Dustin
10/16/2025
I actually have mine mounted upside down under the batteries in my fifth wheel and it’s worked great the past two winters. The only thing I did was add a small drip shield above it just in case of condensation.