How much AC is needed?

my experience is that if you start the AC when the temps inside hit low 70's and let it run continously you may be ok. but temps may rise during the day but still be comfortable. If you start it when the trailer is already hot, it won't pull down the temps much till it cools off at night. And if it gets hot early in the day even starting it early may not be enough.

If you can install a second unit based on what others have already listed, 30 amp vs 50 etc, just plan on doing it. If you do not you are likely to regret not doing it, but you’ll never regret having done it.

My 30'5r only has 1 ac and 30 amp service and I'm determined my next rig will have 2 Ac's and 50 amp service, if for any other reason if one AC fails your trip wont be ruined. It gets awful hot and humid here in Texas and Its hard to keep our rig comfortable when outside temps are above 95.

I intended on adding another unit to mine, but it turns out the roof antenna is right behind the vent so it would have to be relocated and I would need to run a seperate plug to go to the pedestal since I only have a 30 amp service.

I have a Jayco 28RLS with one 13.5K ducted unit. On 90+ degree hot and humid days the unit has had no problem keeping things cool to my wife's satisfaction (meaning quite cool). We start running the unit in the morning so it never allows the trailer to get really hot during the day and then having to play catch up.

As others have mentioned if your unit is already wired for 50 amp adding a second A/C isn't too expensive (price of A/C and basic installation). If your trailer is wired for 30 amp then you could be talking $2,000 for all the wiring, new converter and A/C unit.

Several units I've seen have a sign up on the ceiling noting that wiring for an additional AC unit is already in place.

Mickeyfan0805 wrote:

BeerBrewer wrote:
I am considering purchasing a Grand Design Transcend 26RLS and I'm wondering if the one 15K BTU that it comes with will be enough to keep the coach cool in hotter climates like Texas or Florida?

Seems crazy to ask this question but, how easy is to to add a second unit in bedroom area if we find it too hot. The trailer has a vent with a fan that I'm told can handle another AC unit if needed.


Thanks

The vent hole might accommodate the portion of the AC that plunges into the cabin, but you would need a lot more than that for the AC. Vent fans won't typically have the wiring and power needed for the AC, you will need to tap it into the thermostat, etc... As mentioned above - this is no plug and play upgrade, it would need a pro.

That said, our unit is 3' longer and we've done Florida in July with no problems (and yes, we like it cool).

Many times the vent in a bedroom is prewired for a second AC but it's something that I would check with the manufacture or dealer for sure.

If your trailer is already wired for 50 amp service, yes, adding a second AC is fairly easy. If it's wired for 30 amp service, it can still be done but your looking at additional electrical upgrades to support it.

As for is 15K BTU enough in hot climates, much will depend on how cool you want it, if you park in shade or direct sun, etc. My guess is it will not cool the entire trailer down to 70 degrees if you are parked in the sun but will if you are parked under a shade canopy of a tree.

I myself have a 32 foot toy hauler with a single 15k AC. I am only wired for 30 amp and plan on the hottest days to make sure I am parked in shade and will use the "dump" in the main area instead of the ducting. When I get ready to go to bed and it starts to cool off, shut the dump vent and start using the ducting a couple hours prior to going to bed. New camper as of fall 18 so have not had any hot days in it yet so we will see how this works but I definitely feel I am at risk of some hot nights if it doesn't. I do have a power vent in the bathroom to help suck the hot air out along with windows on both sides of the bed that will have fans in them if needed. Crossing my fingers.

BeerBrewer wrote:
I am considering purchasing a Grand Design Transcend 26RLS and I'm wondering if the one 15K BTU that it comes with will be enough to keep the coach cool in hotter climates like Texas or Florida?

Seems crazy to ask this question but, how easy is to to add a second unit in bedroom area if we find it too hot. The trailer has a vent with a fan that I'm told can handle another AC unit if needed.


Thanks

The vent hole might accommodate the portion of the AC that plunges into the cabin, but you would need a lot more than that for the AC. Vent fans won't typically have the wiring and power needed for the AC, you will need to tap it into the thermostat, etc... As mentioned above - this is no plug and play upgrade, it would need a pro.

That said, our unit is 3' longer and we've done Florida in July with no problems (and yes, we like it cool).

NO, and use professional help, but only if wiring is already installed.