Replacing Atwood GC10A-3E Water Heater with Tankless

Question:

I am replacing an Atwood GC10A-3E RV water heater. The opening is 16 by 15 1/2. The door is 18 by 18. I would like a tankless water heater. What do you recommend?

asked by: Mike O

Helpful Expert Reply:

I am a big fan of tankless water heaters, especially for campers that used for boondocking, off-grid or whichever term you choose. Connected or not connected to shore power, this is a great option. I like the on demand feature that provides as much or as little hot water as you need, as long as you have propane, without wasting fuel to keep water warm when it is not being used. I suggest the Furrion RV Tankless Water Heater, # FR98SR for this application. This has measurements of 12-5/8" in length by 12-13/16" in width with a a depth of 19-3/16". This unit utilizes a vortex system to mix hot and cold water together for purpose of eliminating/minimizing possible temperature fluctuations. It has a wall-mounted controller for temp adjustments, pressure readings and an alarm to alert when the pressure is too low. There are sensors that automatically shut power off if the water temperature exceeds a safe limit. The temperature range is 95 F - 124 F. This has a door opening of 16-1/8" x 16-1/8".

expert reply by: Michael R

John

9/30/2024

Hello, is this the cheapest tankless heater to replace the GC10A? Trying to find the simplest cheapest solution that will be close to a straight swap as possible, we don’t use a ton of hot water. Trying to keep this simple if at all possible. Thx!

Andrew N.

9/30/2024

@John There is technically no direct replacement for the Atwood GC10A water heater, so your best bet is to go with the most economical option that fits that cutout which is Fogatti InstaShower 7 RV Tankless Water Heater - 48,000 Btu - 18"x18" # FG46FR (Black Door) or # FG96FR (White Door). It is considerably lower cost compared to the one you were looking at, mainly because the BTU rating is lower. But that's ok since you said you don't use a ton of hot water. It will use the existing gas and water lines.