Replacement Tankless Water Heater for High Altitude Situations

Updated 11/01/2025 | Published 10/28/2025

Question:

is there a high altitude direct replacement - tankless - water heater that replaces a gc6aa-10e ? 2019 dutchman kodiac cub

asked by: Glen R

Expert Reply:

Hey Glen, thanks for reaching out!

For your application you need the GE Profile Tankless RV Water Heater w/Mixing Tank # GE74RR. I'm not sure how direct of a replacement this is for an old Atwood, but it's 12-1/2" high x 12-1/2" wide x 18-7/8" deep and is rated for up to 10,100 ft and down to 0 degrees Fahrenheit.

Does this fit the bill for what you're needing?

expert reply by: Jon G