Keeping it cool?

The generator and roof air conditioner need regular use and exercise to maintain their good and reliable running condition. Use them!!!! That's what they are there for.
In the overall grand scheme....the 1/2 gallon of fuel per hour used is cheap...cool...comfort. Why sweat and be uncomfortable when traveling, and arriving at your destination???

Expyinflight wrote:
Why sweat and be uncomfortable when traveling, and arriving at your destination???

In terms of cooling capacity the dash A/C in a Ford Class C is FAR more powerful than any rooftop unit is, its ability to move that cold air around is its shortcoming. Opening the rearmost roof vent solves that.

I’ve tried it both ways and my dash A/C will keep my coach as cool all the way to rear as the rooftop and generator can.

The dash A/C is also a LOT quieter than a rooftop unit.

No sweating involved.

If the sun is shinning on your wind shield it will heat the glass and that heat will radiant back into the coach. So I run the cab air conditioner on defrost.

We ran the rooftop A/C with the genny while going through Death Valley at 115 degrees. We also found that foil on some windows helped too.

JaxDad wrote:

Expyinflight wrote:
Why sweat and be uncomfortable when traveling, and arriving at your destination???

In terms of cooling capacity the dash A/C in a Ford Class C is FAR more powerful than any rooftop unit is, its ability to move that cold air around is its shortcoming. Opening the rearmost roof vent solves that.

I’ve tried it both ways and my dash A/C will keep my coach as cool all the way to rear as the rooftop and generator can.

The dash A/C is also a LOT quieter than a rooftop unit.

No sweating involved.

Great....if that works for you. But I can assure you, on 100 plus degree days in the Arizona summer....leaving a roof vent open...not so much for us. As soon as you shut the engine off....the rear of the coach is going to heat up reeeeeealllly quick. No thanks. We run the gen and roof a/c non stop. Could care less if it uses a bit of extra fuel. We travel in cool comfort. :)

The approach of leaving a rear vent open to help suck cool cab air throughout the motorhome would be unacceptable to us: We travel with all vents and windows closed and the cab A/C on "MAX AIR" so that the A/C doesn't bring outside air in - it only continuously recirculates air inside the motorhome.

The cab air conditioning is a lot more efficient at cooling this way (because the cab A/C is no longer having to continuously cool hot new outside air). But here's the big reason for why we do it this way - you don't get outside air continuously flowing through the motorhome from the front air intake (usually somewhere around the front fenders) and then on back to exit through an open vent in the rear ... WHICH MEANS ... the inside of the motorhome stays a lot more free of dust and dirt that otherwise would be carried in from the outside air. This also helps make the more efficient cab A/C cool the entire coach area even better. We use the same approach in our car to help keep it's interior cleaner longer.

On RV trips we also stop to shop, eat lunch, and dry camp off and on - so of course we're very generous about using the generator and rooftop AC to keep the interior of the motorhome cool as required when we're not traveling. We have even run both the rooftop air and idle the V10 for cab air when parked for a fast lunch cool-down if we have been out and about away from the motorhome walking or hiking in scorching temperatures.