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07-03-2020, 07:17 PM
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#21
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Montana Master
Join Date: Oct 2004
Location: Salem
Posts: 7,578
M.O.C. #2283
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Jim these will perform as well as you could wish. We have Fijitsu units. The one on the sun room is 12,000 BTUs and never breaks a sweat in the coolest or hottest weather. It’s 26 seer they now go up to at less 33. It’s been over 10 years and the only thing we have ever had to do to it is wash the filter and replace the remote battery. Just be sure you have enough air flow to the outside unit.
If you can get it in, go for it. There is no way to compare a mini split to the ones in campers today.
Lynwood
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07-05-2020, 01:01 PM
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#22
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Established Member
Join Date: Jun 2020
Location: Fallon
Posts: 37
M.O.C. #26474
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The previous owner of my 3400RL removed the generator from under the front bedroom area, so there is a bit of room in there for the outdoor unit. Since the bedroom is where I'd consider putting it, this would be fairly easy and avoid many of the issues others are dealing with. I've used mini-splits for years overseas but have yet to see one sized for an RV. Suspect that a micro mini-split would be in order, such as these: https://tinyhousehugeideas.com/small...-conditioners/ . The top pick is a Pioneer at about $900 with these specs: Type: Cools & Heats
SEER 19.5
10 HSPF
Indoor Size: 28.5 x 7.5 x 11.5
Outdoor Size: 30.5 x 12 x 22
Room Size: 200-350 ft2
I do not see Samsung, Mitsubishi, or LG listed as manufacturers of these micro units. They start at around 9000 BTUs, which is the probably the low end of most requirements. Given my one AC unit at the opposite end of the RV, I think one of these micros would probably suffice. I am not going to get into the roof mount vs. wall mount issue since that will be peculiar to each owner.
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decarteaux in Fallon, NV
2008 Montana 3400RL, 2006 Dodge Ram 2500 HD Laramie w/Cummins 5.9L 24 valve TurboDiesel. Andersen Ultimate hitch
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07-05-2020, 01:43 PM
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#23
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,204
M.O.C. #6433
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How would you go about running copper lines and new wiring from a low mounted outside condenser unit to ceiling mounted cooling units when retrofitting an existing trailer?
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Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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07-05-2020, 02:06 PM
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#24
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Established Member
Join Date: Jun 2020
Location: Fallon
Posts: 37
M.O.C. #26474
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Covering copper lines on exterior
Quote:
Originally Posted by BB_TX
How would you go about running copper lines and new wiring from a low mounted outside condenser unit to ceiling mounted cooling units when retrofitting an existing trailer?
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I do not know my RV well enough to know if it could be done inside the wall, but that would not be my preference, anyway. I would likely run the lines to the exterior and protect the heck out of them with the proper conduit/panduit. I have seen this done on home units and done nicely.
The set in this link seems to be about right: https://www.highseer.com/products/pv...24481992245312
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decarteaux in Fallon, NV
2008 Montana 3400RL, 2006 Dodge Ram 2500 HD Laramie w/Cummins 5.9L 24 valve TurboDiesel. Andersen Ultimate hitch
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07-05-2020, 03:46 PM
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#25
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Montana Master
Join Date: Oct 2017
Location: Bee Branch
Posts: 2,620
M.O.C. #20693
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Quote:
Originally Posted by BB_TX
How would you go about running copper lines and new wiring from a low mounted outside condenser unit to ceiling mounted cooling units when retrofitting an existing trailer?
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Your right that a retrofit would be difficult. But it probably could be done. Is it worth it over a third roof mount, hard to say...…
But on a new build, ABSOLUTELY!!
__________________
James & Irene Wilson
Bee Branch, AR.
2017 Ram 1 ton diesel duallyCrew Cab/Long Bed
2018 Montana High Country 381TH Garage Full of Toys
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07-05-2020, 06:52 PM
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#26
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Montana Master
Join Date: Oct 2004
Location: Salem
Posts: 7,578
M.O.C. #2283
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With mini splits you wouldn’t need as many BTUs. The duck work in these campers loose at least 25% and probably much more. We have 28,500 BTUs with only a 25% loss we are down to 18,500 BTUs. Power required to run them would be cut by half. SEER on our AC units are probably 10 maybe 12 where the SEER on a mini split starts at about 16 and goes up to 33 or more now. They would be able to heat your camper down to zero or below.
If you watch HGTV other countries have gone to mini splits much more than we have. With all the advantages we will be installing many more in this country. The problem installing them in many houses is they are cut up with too many rooms. You need a inside unit for each room and that gets expensive.
Lynwood
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07-06-2020, 03:09 PM
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#27
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Established Member
Join Date: Jun 2020
Location: Fallon
Posts: 37
M.O.C. #26474
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Quote:
Originally Posted by mlh
With mini splits you wouldn’t need as many BTUs. The duck work in these campers loose at least 25% and probably much more. We have 28,500 BTUs with only a 25% loss we are down to 18,500 BTUs. Power required to run them would be cut by half. SEER on our AC units are probably 10 maybe 12 where the SEER on a mini split starts at about 16 and goes up to 33 or more now. They would be able to heat your camper down to zero or below.
If you watch HGTV other countries have gone to mini splits much more than we have. With all the advantages we will be installing many more in this country. The problem installing them in many houses is they are cut up with too many rooms. You need a inside unit for each room and that gets expensive.
Lynwood
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Wow, I had no idea that the duct loss was that much. Thanks for that info!
Roof mount vs. wall mount - not sure which way I would go. But if the indoor unit is small enough, I'd probably do it that way.
As far as the number of indoor to outdoor units, I do believe that Mitsu or Samsung make a 4 to 1 unit (4 indoor to 1 outdoor). But that outdoor unit gets big quickly and I highly doubt that anything like that would be suitable for an RV. I suspect that a 2 to 1 is doable, but that is outside my sphere of knowledge.
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decarteaux in Fallon, NV
2008 Montana 3400RL, 2006 Dodge Ram 2500 HD Laramie w/Cummins 5.9L 24 valve TurboDiesel. Andersen Ultimate hitch
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07-08-2020, 03:41 PM
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#28
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Established Member
Join Date: Feb 2020
Location: Central
Posts: 38
M.O.C. #25833
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You go first, I will see how yours works out. I just retired after 55+ years as an HVAC contractor. Ive installed countless minisplit units of various brands so I have a fair knowledge of the subject. I wouldn't downsize to the point some are suggesting. I wouldn't count on being able to heat down to very low temps in cold outdoor ambients without a supplemental heat source. More than anything, Im not convinced a mini split not specifically designed to take the day in day out beating our RV road trips impose on the equipment will not beat itself to death in a short time causing numerous refrigerant leaks and other component failures. I would read the manufacturers warranty prior to doing this and see if they will warranty their equipment in this type of installation. IF all this works out then, the mini split option would be a very viable option. Im sure not a fan of the noisy a/c units in my 5ver now but as previously mentioned, they do provide white noise in RV parks which is often a blessing. My 2 cents worth.
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Alan, Jan & Bailey (the Doodle)
2019 RAM Laramie 3500HO/Crew Cab/4X4/LWB/Dually
2020 Montana 3701LK
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07-08-2020, 03:52 PM
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#29
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Montana Fan
Join Date: Sep 2018
Location: Reno
Posts: 293
M.O.C. #22620
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New Horizons run $200,000 - $300,000. It'll be a long time before Keystone catches up with those improvements.
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07-08-2020, 06:34 PM
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#30
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Montana Fan
Join Date: Mar 2016
Location: Austin
Posts: 226
M.O.C. #18363
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07-09-2020, 01:35 AM
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#31
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Established Member
Join Date: Jan 2012
Location: Huntsville
Posts: 18
M.O.C. #12110
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for more information on MINI SPLIT's just type in mini split (both bunches of different brands and suppliers will show up). Can View straight A/C or Heat pumps, THEY do not need strip heat to work , either 110 or 220 volt systems. Have 3 here in the Philippines and will install 2 in our 32x60 RV/house when we get back to Alabama.
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07-09-2020, 07:20 AM
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#32
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Montana Master
Join Date: Oct 2004
Location: Salem
Posts: 7,578
M.O.C. #2283
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Quote:
Originally Posted by Chiefcpo
for more information on MINI SPLIT's just type in mini split (both bunches of different brands and suppliers will show up). Can View straight A/C or Heat pumps, THEY do not need strip heat to work , either 110 or 220 volt systems. Have 3 here in the Philippines and will install 2 in our 32x60 RV/house when we get back to Alabama.
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I’ve had the one on our sunroom in for probably over 10 years. Temperature has been down under 10 degrees and up over 95 probably close to 100 and it’s never failed to keep the room at the set temperature. The only thing I’ve ever done was change the battery in the remote and clean the filter. Our new one in the main part of the house is warranted for 12 years, compressor and parts. It will heat all the way down to -15 while the one in the sunroom is only good to zero.
Lynwood
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07-09-2020, 08:57 AM
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#33
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Established Member
Join Date: Jun 2020
Location: Fallon
Posts: 37
M.O.C. #26474
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Quote:
Originally Posted by Alan & Jan
You go first, I will see how yours works out. My 2 cents worth.
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All good points. Always good to hear the voice of experience. These units have not been adapted to travel (yet), and that would likely create some major issues. No doubt some shock absorption & good structural support would be in order. I'm in a semi-permanent spot so I would consider it. When I move next time (probably just up the road), the unit will likely spend years there. Anyone who is bumping down the road on a regular basis might want to reconsider.
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decarteaux in Fallon, NV
2008 Montana 3400RL, 2006 Dodge Ram 2500 HD Laramie w/Cummins 5.9L 24 valve TurboDiesel. Andersen Ultimate hitch
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