Forum Discussion

deltabravo's avatar
Sep 20, 2015

Adding a heat strip to a Ducted A/C Unit...

.... sounds simple enough, but I got to thinking about this and concluded I bet it won't work.... so correct me if I'm wrong.

Ducted A/C in my rig (and most others I've seen) are tied to the thermostat on the wall, much like a home T-stat, which controls heat and cool functions.

Since there's no controls on the actual A/C unit to engage the heat, then it would seem impossible (and pointless) to install a heat strip in a ducted A/C unit, because there's no way to control it. The wall T-stat's "heat" function is tied to the propane furnace.

Is my line of thinking correct?
  • Golden_HVAC wrote:
    Why?

    The cost of the heat strip is normally well over $75 and a portable electric heater you can bring into the room you are located in, it is very quiet, and easy to replace for $20 - $25.

    Also the noise from my air conditioner is a lot compared to my portable heaters. I have 3 of them, and use them mostly on low heat, blowing on me, so my feet are warm, or to heat up the bathroom just before using it.

    Each heater has a thermostat, and is very compact. DO not buy the huge oil filled ones, or ones with a dome that has a glowing 200F coil on it. Those take to long to cool off before you can put them away. . .

    Good luck,

    Fred.


    I agree with the Why? Heat strips do very little heating. Think hair dryer. Mostly a waste of money. The portable heater would make better sense. However. I do use the oil filled heaters. Silent, and good heat. Mine cools off while I dump the tanks. But if in a hurry could take longer than you want.
  • Why?

    The cost of the heat strip is normally well over $75 and a portable electric heater you can bring into the room you are located in, it is very quiet, and easy to replace for $20 - $25.

    Also the noise from my air conditioner is a lot compared to my portable heaters. I have 3 of them, and use them mostly on low heat, blowing on me, so my feet are warm, or to heat up the bathroom just before using it.

    Each heater has a thermostat, and is very compact. DO not buy the huge oil filled ones, or ones with a dome that has a glowing 200F coil on it. Those take to long to cool off before you can put them away. . .

    Good luck,

    Fred.
  • The Dometic Single Zone LCD system would work- uses 3 wires between Thermostat and control board. Just have to replace them both.
    Should cost around $150 for heat strip, SZLCD T-stat, and box.
  • gbopp wrote:
    Worst case scenario, you could just add a second thermostat to control the heat strip.

    But, based on the above posts, the correct thermostat is available..
    Problem solved. :)


    Maybe, maybe not ... it would also depend on whether the wiring harness running from the A/C to the thermostat is suitable for also running that electric heating element. This wiring will have originally been installed as the coach was being built so running a different one through the walls and ceiling could be problematic after the fact. Rather than rely on forum WAGs the OP would be well advised to have an authorized dealer of whatever make / model A/C he owns contact the manufacturer with the model number, product number, and serial number of the A/C and ask what's involved.
  • Worst case scenario, you could just add a second thermostat to control the heat strip.

    But, based on the above posts, the correct thermostat is available..
    Problem solved. :)
  • a heat strip is a waste of money. a $19 ceramic cube heater works just as well if not better and can be moved to where it is needed. and any heat it produces will be lost warming up the ductwork. save your money.
    bumpy
  • I installed a heat strip in our Dometic 15k A/C. It required a new control box as well as a new thermostat. My new state has Fan, Cool, Heat, and Furnace.
  • Not necessarily, as our new Allegro has a het pump with the front A/C, and the thermostat is labelled " electric heat , or A/C" under 2 separate switches.

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