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Old 05-15-2021, 08:45 AM   #1
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RecPro Air Conditioners for E21C

I just came across a thread "21' Ne air conditioner" posted 6/8/20. I can't post a link because I don't know how. It refers to several E19 owners installing Recpro's 13.5K model RP-AC3400 ACs built by Houghton. It is low profile , non-ducted with heat strip and soft start. It is very quite and highly rated. It is however 3 1/2" linger than the Dometic installed by ETI. Recpro offers 2 other models that interest me.
RP-AC2801 9.5K: Quite with soft start, no heat strip. According to several members it is sized right for a 21C. The problem they have been out of stock for many months. I have call once a month for the past 4 months and they have no expected delivery date. The other is :

RP-AC3501: quite with soft start, not low profile and no heat strip. It is 1" shorter than the Dometic so it should have no problem fitting on an E21C.

I have completed my build sheet for an 8/4/21 delivery w/o an AC unit. Being without AC is not an option for us. I can't wiat much longer for the 9.5K units so I have to choose between the (2) 13.5K ACs. I would prefer the AC3400 low profile w/ heat strip. It's $13500 vs $950 but at this point that doesn't matter. Being 3 1/2" longer the best I can questimate from scaling photos of the ACs is that It will extend 2 1/2 " further aft of the vent opening.

The big question, Will it fit on the raised reinforced roof area of a E21C and also clear the factory installed solar panel. If anyone has any information It would be greatly appreciated. Thanks Jim A.

Update: My guestimate for the distance from the aft end of the vent opening to the rear of the shroud is 23 3/4" and since the shroud tapers toward the bottom, the bottom of the shroud at the aft end is about 22 1/4" from the aft end of the vent openin.g
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Old 05-15-2021, 09:47 AM   #2
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Sorry you can't find the 9.5K Houghton in stock. I guess we got lucky. I just finished installing ours and so far it seems pretty good. Much quieter than the Dometic which, from the videos I've seen, sounds like a jet engine. Still, it's an air conditioner that is right above your head, so there is some noise.

There is plenty of space between this unit and the rear solar panel so I doubt you will have a problem with 3-1/2" of additional length. Also, the 9.5K sits on several foam pads aft of the roof opening. So even if the larger unit extends a bit over the lower area of the roof it should be adequately supported. I'll try to post a few photos of our install later.
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Old 05-15-2021, 01:28 PM   #3
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Sorry you can't find the 9.5K Houghton in stock. I guess we got lucky. I just finished installing ours and so far it seems pretty good. Much quieter than the Dometic which, from the videos I've seen, sounds like a jet engine. Still, it's an air conditioner that is right above your head, so there is some noise.

There is plenty of space between this unit and the rear solar panel so I doubt you will have a problem with 3-1/2" of additional length. Also, the 9.5K sits on several foam pads aft of the roof opening. So even if the larger unit extends a bit over the lower area of the roof it should be adequately supported. I'll try to post a few photos of our install later.
Don, thanks for your reply. Pictures would be great. Are the foam blocks a standard item that are included with the AC. My plan is to have the AC shipped to Bellingham WA and have it installed shortly after picking it up at Sumas. I did you find any installation with the unit?
Thanks again
Jim A.
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Old 05-15-2021, 02:42 PM   #4
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Here are a couple of photos of the 9.5K. The manual that comes with it has basic installation instructions. We used a 12’ ladder and two double pulleys for mechanical advantage to hoist it to the roof. The foam spacers come attached to the underside of the roof unit.
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Old 05-15-2021, 05:58 PM   #5
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Here are a couple of photos of the 9.5K. The manual that comes with it has basic installation instructions. We used a 12 ladder and two double pulleys for mechanical advantage to hoist it to the roof. The foam spacers come attached to the underside of the roof unit.
Don, It looks Gooood! Sleek and a nice fit. I looks like it comes close to the end of the raised area. From the photos on the RecPro site it is easy to see they foam pads on the 9.5K model. The 13.5K model AC3400 photos of the bottom are in black and it is difficult to determine the pad locations. If there is a pad close to the back end I think it may be beyond the end of the raised area. I'll try to contact RecPro Monday. Thanks for your input and congratulations on a job well done.
Jim A.
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Old 05-15-2021, 06:35 PM   #6
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Worst case is you have to peal off the pads and reposition. The unit come right to the end of the raised portion of the roof, but the large pad is positioned further forward, then there are a couple of others closer to the rear edge. I don't think it would be too hard to move them. Hope it works out for you.
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