Yes it is. So it got me to working on how to use my motorhome in cold climates. I'm reasonably sure most motorhomers know about the problems, condensation, making enough heat etc.
Here is an idea for a product that is ovedue.
When I built my earth sheltered home in 1980 I realized it was so airtight that the trapped impurities in the air must be dealt with in an energy conserving manner. What I used was an air to air heat exchanger. No compressor, no heat pipes, no freon etc. It uses pleated paper to separate the outgoing air from the incoming. At the same time the exchange takes place the heat from the hottest side transfers to the cold side. That's because heat always moves to cold. That's the simplest way to put it. If you give that statement some thought you will realize how obviously true it is. All that is running is a fan.
Anyway, why isn't my motorhome equipped with an air to air heat exchanger? It's not even an option. I don't think they even thought of it.
Here's a link to one current model made for home use. I'm sure it could be adapted to MH use. They do offer 24 and 48 volt models. Take note of how little electricity is used. I just grabbed this one as an example.
HE150 Air-to-Air Heat Exchanger - Smarthome
You get the advantage of conserving that precious heat. You get rid of that moisture buildup and maybe all of the condensation on the windshield. You might not have to run a dehumidifier.
I think the MH companies should offer this option.
I would like to buy one adapted for use in my useless roof vent.
Have to great day.
Last minute update. This will show what the Mitsubishi system looks like and sort of how it works. It's good OLD technology.