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Truma Combi eco

The original furnace and water heater

Enjoy twice the comfort with Truma Combi eco: furnace and water heater in one appliance. This saves space and weight in your travel trailer or motorhome.

Space-saving two-in-one appliance
Near-silent operation
Efficient heat for year-round camping

Technical Details

Suitable for
Travel trailers and motorhomes
Available for
OEM
Energy source
Propane
Energy input rate
Level 1: 7,500 BTU/h
Level 2: 14,300 BTU/h
Fuel consumption
Level 1: 5.3 oz/h (150 g/h)
Level 2: 10 oz/h (290 g/h)
Power consumption
transient: max. 6.1 A (at 12 volt DC)
Capacity of water tank
2.64 gallons (10 liters)
Water heating time (from 59°F to 140°F)
approx. 23 minutes in hot water mode
Water inlet pressure
max. 40.6 psi (2.8 bar)
System operating pressure
max. 65.3 psi (4.5 bar)
Weight
35.1 lbs (15.9 kg)
Dimensions
18.3" W x 20.6" L x 11.8" H (465mm W x 523mm L x 300mm H)

Truma Combi eco – 2-in-1 RV System

Enjoy twice the comfort with Truma Combi eco: an RV furnace and water heater in one appliance. This saves space and weight in your motorhome or travel trailer. Truma has integrated a 2.64 gal. (10L) water tank into the system so that the water can be heated in the colder months. When the weather is warm, you can use your hot water without running the furnace.  The ducted furnace delivers heat throughout the RV for a pleasant indoor climate. Warm air flows from strategically placed outlets throughout the RV. The Truma Combi heater is almost silent and extremely economical to run.

The Truma Combi is nearly silent. The only way we even know if ours is on is if we stick a hand in front of one of the vents.
James Adinaro
The Fit RV

Truma Combi – The Industry Original

Truma introduced the Combi to the RV industry in 2007, the first RV furnace of its type. Since then, Truma has continued to innovate and evolve this heating technology. Hot air and hot water from one smart appliance provide the comforts of home while out on the road. The water tank is integrated into the furnace, providing hot water while it produces hot air. When the weather is warm, you can use your hot water without running the furnace.

Truma Combi eco Features:

  • Near silent operation
  • Lightweight and space-saving solution
  • Maintains constant temperature throughout the RV
  • Highest available energy-efficiency over 90%
  • Durable stainless steel water tank
  • Adjust functions intuitively on the digital CP plus control panel

Optimize Your Heat

The Truma Combi is designed to deliver warm air into the interior of your RV through strategically placed outlets. Optimize your heating with directional Lamella vent covers.

Buy here

Heading out this winter?

Visit our blog to find articles that will help you extend your camping season and get the most out of your RV:

Two Systems, Complete Comfort

The Truma Combi owners are just one step away from achieving complete comfort. Truma Interconnect capabilities allow you to upgrade your RV with a Truma air conditioner and utilize the CP plus already installed in your vehicle. Control your heating and hot water functions from the Combi and the cooling functions of your Aventa from one convenient place.

Learn more

Truma Interconnect Graphic

Additional Heating Systems

FAQ

  • How do I winterize my Truma Combi eco?

    Please refer to your RV manufacturer’s instructions for winterizing and bypass valves.

    1. Place a vessel that’s at least 2.64 gallons (10 liters) underneath the drainage outlet of the drain valve.
    2. Use the main switch or pump switch to turn off the power to the water-pump
    3. Turn off or disconnect the city water connection if present
    4. Open all water release points, e.g. cold and hot water faucets, showers, toilets
    5. Flip yellow handle to be in line with valve body to drain.
  • My CP plus is showing error code E8. What should I do?

    If your CP plus control panel is displaying error code E8, disconnect and reconnect power to the CP plus. Make sure all connections are clean and making good contact. If the error persists, please contact Truma Customer Care for additional support.

  • My CP plus is showing error code E18. What should I do?

    If your CP plus control panel is displaying error code E18, it means your air intake is obstructed. Clear the air intake and check warm air outlets for blockage or crushed ducting. If the error persists, please contact Truma Customer Care for additional support.

  • My Combi will not stay lit but I am not getting an error code. What should I do?

    If your Truma Combi will not stay lit but you are not receiving an error code, check to make sure the tank has not frozen. If the tank freezes, it can become swollen and restrict the air flow into the ducting. This could cause the unit to overheat and cycle off. If the error persists, please contact Truma Customer Care for additional support.

  • My Combi will not operate on gas mode. What should I do?

    If your Combi will not operate in gas mode, please try these troubleshooting steps:

    1. Has the Combi previously worked on LP?
    2. is the gas turned on at the tank?
    3. Is there a gas on/off switch in the coach
      • if so is it in the on position?
    4. Is there LP in the cylinder?
    5. Do other gas appliances run for more than 30 seconds?
    6. is the cylinder in the full open position?
    7. Is there a cylinder changeover valve and is it turned to the correct position (full cylinder)?
    8. is the switch on top of the Combi unit in the ON position?
    9. is the 12V master switch for the vehicle switched on?
    10. does the Combi operate properly in 110V mode?
    11. Has the high limit reset been tripped?
      • If so, run cold water through the Combi for a few minutes and reset if tripped.

    If you verify all the steps above and are still having problems, contact Truma Customer Care for additional support.