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 > R-7 insulation value

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forrestrv

washington

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Posted: 11/13/11 09:57pm Link  |  Print  |  Notify Moderator

I am in the process of buying a travel trailer with R-7 insulation in the roof, sidewalls and floor is this decent, or will it be fairly cold with R-7 insulation, i live in the pacific northwest.

B.O. Plenty

Minnesota

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Posted: 11/13/11 10:12pm Link  |  Print  |  Notify Moderator

That's very minimal. Should be good for 40 degrees and above but not for any cold weather. It's going to be hot in the Summer as well.

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mockturtle

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Posted: 11/13/11 10:32pm Link  |  Print  |  Notify Moderator

I agree that would be minimal insulation for an RV. My C is R-11. As B.O. has stated, it's not only important for cold weather but for hot weather, as well. Just face the fact that you will need to heat and cool your TT more than you would a better insulated unit.


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ktmrfs

Portland, Oregon

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Posted: 11/13/11 10:40pm Link  |  Print  |  Notify Moderator

ours is r-9 walls, r-14 roof and r-30 floor, r-15 in the slideouts, and a covered bellypan. still gets hot in the summer and is adequate for our winter trips in the PNW. IMHO r-7 is going to be pretty marginal if you do any fall or spring camping, and it will take a pretty good A/C to keep it cool in the summer. As I mentioned our is adequate, we have camped in the winter with temps in the low 20's I wouldn't want anything colder with our trailer.


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forty4san

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Posted: 11/13/11 11:12pm Link  |  Print  |  Notify Moderator

Your in the PNW, check out an Arctic Fox.


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LarryJM

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Posted: 11/14/11 02:35am Link  |  Print  |  Notify Moderator

ktmrfs wrote:

ours is r-9 walls, r-14 roof and r-30 floor, r-15 in the slideouts, and a covered bellypan. still gets hot in the summer and is adequate for our winter trips in the PNW. IMHO r-7 is going to be pretty marginal if you do any fall or spring camping, and it will take a pretty good A/C to keep it cool in the summer. As I mentioned our is adequate, we have camped in the winter with temps in the low 20's I wouldn't want anything colder with our trailer.


Might want to check your specs for the floor since the Keystone sites says the floor is R-14 ... R-30 is high even for a S&B home.

Larry


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shum02

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Posted: 11/14/11 04:41am Link  |  Print  |  Notify Moderator

My KZ is an R7-9 rig and we camp all winter up here in Ontario. Just requires a little more propane and an extra electric heater to keep the unit comfortable even down to -20C.

Unless your only camping with propane don't worry about it, you've already paid for the electricity. Finding and filling all the holes in a rig and stopping drafts as well as adding insulation to exterior doors and windows will also help a ton to make a rig comfortable.


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pianotuna

Regina, SK, Canada

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Posted: 11/14/11 07:12am Link  |  Print  |  Notify Moderator

Hi,

A lot can be done to improve heat loss. Last year my "back yard" experiments results suggested about 430 Btu's per 1 degree delta T, or about 126 watts of heating.

I've been making modifications to my Class C to improve these numbers and prevent fresh water line freeze ups.

Our first cold weather arrived on the weekend and here are the results:

968 watts =~3304 btu's 18 C above ambient, 183.6 btu's per degree and 53.8 watts per degree.


Regards, Don
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coolbreeze01

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Posted: 11/14/11 09:00am Link  |  Print  |  Notify Moderator

forrestrv wrote:

I am in the process of buying a travel trailer with R-7 insulation in the roof, sidewalls and floor is this decent, or will it be fairly cold with R-7 insulation, i live in the pacific northwest.


As a comparison, our Komfort is R-18 Floor, R-17 Roof, R-7 Wall.

My latest Arctic Fox brochure lists R-18 Ceiling, R-7 Walls and Floor.

Have fun shopping.


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TurnThePage

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Posted: 11/14/11 09:43am Link  |  Print  |  Notify Moderator

Mine is also R7 all the way around. I want better eventually, but it's very livable in the mean time. My trailer is fairly small, and the 13.5k BTU AC has no problem keep it cool in the Summer. And it's not bad to heat in the Winter either. As others have pointed out, there are many things you can do to improve the situation: home made storm windows, insulated curtains, sleeping bags (or similar) stuffed into storage areas, insulate the roof vent, etc., etc. An electric heater on the low (750 watt) setting will keep the whole trailer comfy down to about 35F.

On edit: That's down to 35F without using the onboard furnace.

* This post was edited 11/14/11 10:19am by an administrator/moderator *


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