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Old 03-19-2021, 02:31 PM   #1
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Brand: Thor Motor Coach
Model: Miramar
State: Arizona
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Uneven heating

This may be just part of having an RV, but it seems keeping the entire unit evenly heated is impossible. The thermostat is in the hall, but the heat comes out right under the master bed. We cook while trying to sleep. Tried a fan; helped a tiny bit. We have a 2021 Miramar 35.2. Ideas? Similar experiences?

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Old 03-19-2021, 03:23 PM   #2
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Keeping the air moving is your best option.
Get a smaill (tiny) fan or two: and have them right down next to (above is even better) the heater vents. They should push the hot air out into the res of your rig. another fan or two out there should push the cooler air back toward you.
Good luck!
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Old 03-19-2021, 03:41 PM   #3
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We use electric space heaters when on campground power. One small one in the bedroom, one bigger one in the living area. It helps and the coach furnace barely kicks on.
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Old 03-19-2021, 08:39 PM   #4
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I too am a big fan of using electric space heaters when possible. Saves propane and works better too. We use a good quality oil filled radiator style centrally placed and generally it is sufficient for the kinds of weather in which we choose to camp. We were in Texas last month when temps got down in the low teens for several days. Our regular heater plus a small cube ceramic heater easily kept us in the 70s. The shore power was off for much of the time and we were able to run both heaters on the generator. It was trip!
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Old 03-19-2021, 10:15 PM   #5
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Pete,
What brand ceramic heater are you using?
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Old 03-19-2021, 11:04 PM   #6
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Originally Posted by Bob Denman View Post
Pete,

What brand ceramic heater are you using?


Donít remember (itís blue though!). I donít use it often as I had a similar heater burst into flames one time and the memory lingers. I also like that the radiator style heater provides more even and less directional heat. I wonít use the cube at night or when Iím away from the coach but I leave the other one going all the time.
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Old 03-19-2021, 11:22 PM   #7
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Blue...
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Old 03-20-2021, 01:55 AM   #8
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Quote:
Originally Posted by TeamBronica View Post
This may be just part of having an RV, but it seems keeping the entire unit evenly heated is impossible. The thermostat is in the hall, but the heat comes out right under the master bed. We cook while trying to sleep. Tried a fan; helped a tiny bit. We have a 2021 Miramar 35.2. Ideas? Similar experiences?
I was wondering why you were trying to cook while sleeping............

Then I got it.

Your furnace is basically under your brd so the outlets in the bedroom will have the hottest and most air flow. Our ACE is the same way. The farther the outlets are from the furnace the less air flow and lower the air temperature will be.

You've see the replies about using space heaters and most RVers do that but sometimes that can't keep up and the furnace is heated.

So yeah we use a space heater with a thermostat out in the living area below the front A/C. We turn the fan on the A/C on low with all front vents closed but with the bedroom vents open. The warm air from the vent heater is directed to the bedroom. We usually set the furnace thermostat 3 to 4 degrees below the space heater's setting so if it gets too cold it will heat things up for a few minutes, but since that thermostat is near the space heater, the furnace won't run too long.
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Old 03-20-2021, 03:01 AM   #9
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Quote:
Originally Posted by TeamBronica View Post
This may be just part of having an RV, but it seems keeping the entire unit evenly heated is impossible. The thermostat is in the hall, but the heat comes out right under the master bed. We cook while trying to sleep. Tried a fan; helped a tiny bit. We have a 2021 Miramar 35.2. Ideas? Similar experiences?
Here's a thread with a similar situation.
https://www.thorforums.com/forums/f2...29m-24022.html

Fixing/shortening the hoses and adding a adjustable vent really helped our unbalanced heat. But as mentioned we use a small electric heater unless it's really cold.

Here's an adjustable vent.

https://www.amazon.com/dp/B00CXBEWT4...ing=UTF8&psc=1
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Old 03-21-2021, 11:46 AM   #10
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Originally Posted by abjbrtd View Post
Here's a thread with a similar situation.

https://www.thorforums.com/forums/f2...29m-24022.html



Fixing/shortening the hoses and adding a adjustable vent really helped our unbalanced heat. But as mentioned we use a small electric heater unless it's really cold.



Here's an adjustable vent.



https://www.amazon.com/dp/B00CXBEWT4...ing=UTF8&psc=1


Thanks! That is great advice!
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Old 03-24-2021, 06:40 PM   #11
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Blue...
Well the first one was blue, it now is ash-en.
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Old 03-24-2021, 09:04 PM   #12
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We have a Lasko tower heater. We use it all the time. We don't usually leave it going when we're out but it does have an emergency shut off if it somehow tips over.
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Old 03-24-2021, 10:42 PM   #13
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Well the first one was blue, it now is ash-en.


Lol. Youíre a hoot, my friend!!
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Old 03-24-2021, 11:43 PM   #14
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It looks like the 35.2 has two floor vents toward the front. These are heat only and the factory is always very sloppy on the crap that ends up in these. The 'duct' is an opening in the floor supports from front to back between the floor you stand on and the ceiling of the basement storage.

Time to remove the grilles and check for the usual sawdust (many threads here) and if there is a blockage. You may need a bore scope but an iPhone can take a pic down under. From what I see they look like a straight shot under the floor to the heater under the bed (how do you stand the noise?). Back at the heater should be a couple of short flex ducts to the floor, remove the flange on the floor and check there also.

Since the return air is under your bed all the air from the vents tries to return back to your bedroom. I would shut off the one that under your bed and let the rest of them push the heat toward the front.

Good luck.
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Old 11-16-2021, 03:14 PM   #15
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We purchased all of the parts we needed to fix the issue. Not perfect but it works.Click image for larger version

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Old 11-16-2021, 04:42 PM   #16
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Fortunately our furnace distributes the heat pretty evenly, but we use electric heat as much as possible to save on propane.

When AWAKE, we use a little $20 "Comfort Zone" ceramic heater - found at any big box store. I would urge EXTREME caution using ANY type of electric space heater when asleep. They are the biggest cause of home fires in winter - for good reason. As explained by other posters, use fans to more evenly distribute the furnace heat at night while asleep.

Also, paying more for one of those little heaters, thinking the more expensive ones are safer is a FALSE SENSE of security! They ALL work the same way... and if it says "1,500 watts"... claiming "more efficient" by one over another is a blatant lie.
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Old 11-16-2021, 06:04 PM   #17
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Quote:
Originally Posted by 16ACE27 View Post
I was wondering why you were trying to cook while sleeping............

Then I got it.

Your furnace is basically under your brd so the outlets in the bedroom will have the hottest and most air flow. Our ACE is the same way. The farther the outlets are from the furnace the less air flow and lower the air temperature will be.

You've see the replies about using space heaters and most RVers do that but sometimes that can't keep up and the furnace is heated.

So yeah we use a space heater with a thermostat out in the living area below the front A/C. We turn the fan on the A/C on low with all front vents closed but with the bedroom vents open. The warm air from the vent heater is directed to the bedroom. We usually set the furnace thermostat 3 to 4 degrees below the space heater's setting so if it gets too cold it will heat things up for a few minutes, but since that thermostat is near the space heater, the furnace won't run too long.

Same here...we use one or two small space heaters and turn on A/C to "fan only". It circulates the heat just as if it were a central system at home. Most nights I'll find myself turning one of the space heaters off and lowering the temp a bit on the other.
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