Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
Storage container Heat loss
Jellis
Member Posts: 228
Howdy folks!
I am trying to size a heating and cooling unit for a storage container to be used as conditioned storage.
40x8x8 and 20x8x8
will use 2" of open cell spray foam on walls and ceiling,
container will be sitting on slab.
No windows, 1 exterior door
interior desired temp 70°F outdoor heating temp -4°F
I've tried a few different tools and have come up with a fair difference in BTU requirements.
Curious if anyone has had any luck with this.
I am trying to size a heating and cooling unit for a storage container to be used as conditioned storage.
40x8x8 and 20x8x8
will use 2" of open cell spray foam on walls and ceiling,
container will be sitting on slab.
No windows, 1 exterior door
interior desired temp 70°F outdoor heating temp -4°F
I've tried a few different tools and have come up with a fair difference in BTU requirements.
Curious if anyone has had any luck with this.
0
Comments
-
Open cell foam has an R value of 3.8 per inch. I'm guessing the only infiltration is the door?To learn more about this professional, click here to visit their ad in Find A Contractor.1
-
@Robert O'Brien
yes indeed. just the door.0 -
Don't overthiink it. You have 2 inches of foam at R 3.8 per inch. That gives you a total R of 7.6. Then your heat loss rate is your delta T (74) times your area -- whatever that is -- divided by your R value.Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England0 -
The floor is a big variable being uninsulated. Without that factor, my calc says 11,000 at design for the 40ft container. I would estimate that to double if the floor were factored in, but my program doesn't seem to want to cooperate0
-
Can you lift the container enough to insulate under the floor? A forklift or a couple of bottle jacks may be able to get you enough room to spray some foam under there. Then all you would need is a couple of candles every other day. That sounds like you might need Air Conditioning in the summer too. A ductless mini-split HP might do both zones if they are close enough to each other.
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
1 -
what you doing in these boxes?
ventilation?known to beat dead horses0
Categories
- All Categories
- 86.3K THE MAIN WALL
- 3.1K A-C, Heat Pumps & Refrigeration
- 53 Biomass
- 422 Carbon Monoxide Awareness
- 90 Chimneys & Flues
- 2K Domestic Hot Water
- 5.4K Gas Heating
- 100 Geothermal
- 156 Indoor-Air Quality
- 3.4K Oil Heating
- 63 Pipe Deterioration
- 917 Plumbing
- 6.1K Radiant Heating
- 381 Solar
- 14.9K Strictly Steam
- 3.3K Thermostats and Controls
- 54 Water Quality
- 41 Industry Classes
- 47 Job Opportunities
- 17 Recall Announcements