Do you Have a Tankless Water Heater to Replace My Suburban SW12DE in My 2015 Heartland Bighorn?
Updated 10/22/2025 | Published 04/03/2025
Question:
Vehicle is a 2015 Heartland Bighorn Fifthwheel. Original equipment water heater is a Suburban SW12DE. Is there a gas tankless 2.5 gpm model that would fit in the current opening as a direct replacement? Thank you
asked by: Steve T
Expert Reply:
Hello Steve,
Great question, and it looks like you already found it. The Fogatti InstaShower 7 RV Tankless Water Heater - 48,000 Btu - 18"x18" White Door # FG96FR has all the requirements that you are seeking. The 18" x 18" door will make it so there isn't any gaps in the exterior of the camper, it is gas, and it provides 2.5 gallons per minute of hot water.
Did your Suburban SW12DE quit working?
Product Page this Question was Asked From
Fogatti InstaShower 7 RV Tankless Water Heater - 48,000 Btu - 18"x18" White Door
- RV Water Heater
- Tankless Water Heater
- Gas
- 40001 - 55000 Btu
- 12 Volts
- 13L x 13W x 13-13/16D Inch Cutout
- 14-5/16L x 18W x 18D Inch
- White Door
- Fogatti
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Kate F.
10/22/2025
Hey Steve, how did the Fogatti InstaShower 7 work out as a replacement for your Suburban SW12DE in the Bighorn? Did the fit and water flow meet your expectations? Your feedback could help others looking to make the same swap.