Keeping it cool?

YES !!! Xhot or Mountains ~~ Turn on Genny run roof top AC.

Saves gas in long run. JM2¢ ~~ YMMV

You can if you want to. My car accident cools down my class c enough for driving. Nobody s8ts back there though.

Start your generator and turn on the roof A/C while driving. It won't hurt anything.

If you crack open a rear vent, especially if you can run the fan on a low "air out" setting, or window in the back of your coach and run the dash AC on high {aim the vents straight back and not in the face of the passengers}, it will go a long way toward cooling the coach.

In all but the most extreme temps this often will be all that you need. On a large Class C, 32' + obviously this won't be as effective as one that is 32'or less but it can often eliminate the need to run the generator to feed the roof AC. Running your generator will work but is going take at least half a gallon an hour and often more than that which will hit your mileage/wallet.

:C

Thanks for the quick replies.

Hi,

I've had some success by running the roof air on fan only. This seems to help distribute the cab air to the rest of the RV.

On a hot day I will run the roof air via a generator for an hour before I stop.

pianotuna wrote:
Hi,

I've had some success by running the roof air on fan only. This seems to help distribute the cab air to the rest of the RV.

On a hot day I will run the roof air via a generator for an hour before I stop.

Don ... just curious: How does one run the air conditioning system's circulation fan when going down the road without running the generator ... or are you assuming an inverter is involved and feeding the RV's air conditioner circuit breaker while driving?

Desert Captain wrote:
If you crack open a rear vent, especially if you can run the fan on a low "air out" setting, or window in the back of your coach and run the dash AC on high {aim the vents straight back and not in the face of the passengers}, it will go a long way toward cooling the coach.

In all but the most extreme temps this often will be all that you need. On a large Class C, 32' + obviously this won't be as effective as one that is 32'or less but it can often eliminate the need to run the generator to feed the roof AC. Running your generator will work but is going take at least half a gallon an hour and often more than that which will hit your mileage/wallet.

:C

I agree 100%.

Hi Phil,

I use the Magnum inverter which is wired to run the "whole house" to run the air conditioner in fan only mode.

I can use the inverter to run the roof air for some time, but I worry about damaging the alternator, so I observe a strict 20 minutes of run time (1/3 duty cycle, so 40 minutes OFF) and monitor the starter battery. If the starter battery "hits" 12.3 volts, then I turn off the loads.

If cooling is not needed I'll sometimes use the water heater on the electric setting.

pnichols wrote:

pianotuna wrote:
Hi,

I've had some success by running the roof air on fan only. This seems to help distribute the cab air to the rest of the RV.

On a hot day I will run the roof air via a generator for an hour before I stop.

Don ... just curious: How does one run the air conditioning system's circulation fan when going down the road without running the generator ... or are you assuming an inverter is involved and feeding the RV's air conditioner circuit breaker while driving?

I agree with Desert Captain. The vehicle AC keeps the whole coach cool and I always just open the vent in the bathroom to create a little suction of the air towards the back. I do this frequently on 100+ days and it works fine going down the road. I can think of only once or twice when I have kicked on the roof air and generator. Those were exceptional days going full blast across the Southwest with temps way above 100.

Paul