2nd AC addition, how hard

Here's my portable I installed because I didn't have enough roof clearance to park in my shop. Works great..

I have one ac in the garage and one in the front bedroom. They are both connected to the duct. Each has its own thermostat. They will keep my 40 footer at 72F in 90 degree weather. I keep the vents on both units almost closed and the cold air goes to the living area.

TucsonJim wrote:
I went to New Orleans and Houston in the middle of summer last year. We'd usually arrive in camp at about 3pm and turn on the AC. I just couldn't get the FW comfortable until after the sun went down. We had a second AC installed this past winter, and it made a HUGE difference. It would be comfortable in an hour or so, even with the sun shining.

I believe the Montana line has the capability to put a ducted AC in the front that will compliment the unit in the back. It really makes a big difference if both units are cranking cold air into the duct. An added advantage is that you can shut one of them off at night, and still have cold air in the FW. We like to shut the one off over the bed at night to keep the noise down. By running the one in the back of the FW, we have comfortable temperatures in the bedroom, and less noise.

Make sure you get a low profile unit for the front to keep the overall height of your FW as low as possible. With our low profile unit, we are 12ft, 10 inches.

Thank you, that's the info I was just going to ask about. Being able to turn one off could be necessary if I have to run off a generator.

I'll start doing some looking and ask about ducting in to the AC

JCasper wrote:


How much better cooling will I get with this non ducted unit blowing in my bedroom and a ducted unit back in the bunkroom? I'm assuming it will definitely be better then what I have.

Based on my experience, you'll see a big difference. Much faster cool-down after first hooking up.

I went to New Orleans and Houston in the middle of summer last year. We'd usually arrive in camp at about 3pm and turn on the AC. I just couldn't get the FW comfortable until after the sun went down. We had a second AC installed this past winter, and it made a HUGE difference. It would be comfortable in an hour or so, even with the sun shining.

I believe the Montana line has the capability to put a ducted AC in the front that will compliment the unit in the back. It really makes a big difference if both units are cranking cold air into the duct. An added advantage is that you can shut one of them off at night, and still have cold air in the FW. We like to shut the one off over the bed at night to keep the noise down. By running the one in the back of the FW, we have comfortable temperatures in the bedroom, and less noise.

Make sure you get a low profile unit for the front to keep the overall height of your FW as low as possible. With our low profile unit, we are 12ft, 10 inches.

TucsonJim wrote:
If it's a standard crank up vent, it is sized correctly for an AC unit. On your 2013 model, you shouldn't have any non-standard sizes.

Great, sounds easy. I just called my local dealer and he said an hour or two of work, only thing is he needs to see the thermostat to see if it would control both units.

How much better cooling will I get with this non ducted unit blowing in my bedroom and a ducted unit back in the bunkroom? I'm assuming it will definitely be better then what I have.

If it's a standard crank up vent, it is sized correctly for an AC unit. On your 2013 model, you shouldn't have any non-standard sizes.

Is the whole for the vent correctly sized for an AC unit or does something need modified?

Did the manufacturer prewire the front vent for the addition of an AC? If so, the job is fairly easy. As mentioned, the hard part is getting 100# of AC up on the roof.

If it's not prewired, you'll have to figure out where the wiring will come from and make sure you're not overloading a breaker.

Jim

the hardest part is getting thecaulkingoff the roof.I useeternabond around the hole before setting theacunitover it.Should take about for anonducted unit.The hardest part on theacpart is getting it on the roof