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shorter4
Registered Users
Posts:1
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| 03/30/2008 10:24 AM |
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| I have a 36 x 32 x 12 shop with 2inches of insulation under the slab and 12 inches blown in the ceiling and r24 in the walls, tin on the walls & ceiling , two walk in doors & a 16 x 10 insulated garage door. I have pex in the slab & using a 80 gallon electric hot water heater to haet it right now but it doesnt recover quick enough! I was thinking of going to a propane boiler but dont have a clue how to size one. Any help would be greatly appreciated. Thanks Northern Indiana |
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PanelCrafters
Registered Users
Posts:1279
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| 03/30/2008 11:41 AM |
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Posted By shorter4 on 03/30/2008 10:24 AM
I have a 36 x 32 x 12 shop with 2inches of insulation under the slab and 12 inches blown in the ceiling and r24 in the walls, tin on the walls & ceiling , two walk in doors & a 16 x 10 insulated garage door. I have pex in the slab & using a 80 gallon electric hot water heater to haet it right now but it doesnt recover quick enough! I was thinking of going to a propane boiler but dont have a clue how to size one. Any help would be greatly appreciated. Thanks Northern Indiana
You need to have an accurate Heat Loss calculation performed. We have a one on our website.
Good Luck!
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....jc
If you're not building with OSB SIPS(or ICF's), why are you building? |
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gregj
Registered Users
Posts:132
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| 03/31/2008 3:29 PM |
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Panelcrafter, I looked at your calculator and have some questions.
If using ICFs do I use the "concrete" row and change the R value to that of my ICF?
For SIPs what row do I use?
If I'm figuring 2x4 walls do I put in the R value of the fiberglass batts that I'm using (say R11) and does it adjust for the conductance of the lumber and use an effective R value of say R9?
If I use foam boards over the 2x4 with fiberglass batts how do I enter that?
Thanks! |
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PanelCrafters
Registered Users
Posts:1279
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| 04/01/2008 7:48 AM |
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Posted By gregj on 03/31/2008 3:29 PM
Panelcrafter, I looked at your calculator and have some questions.
If using ICFs do I use the "concrete" row and change the R value to that of my ICF? Use either 2x4 or 2x6 and change the R-Value.
For SIPs what row do I use? Again, use 2x4, 2x6 or 'Concrete Air', and change the R-Value. Do not use 'Concrete Earth' as the Delta T is based on the Earth temp.
If I'm figuring 2x4 walls do I put in the R value of the fiberglass batts that I'm using (say R11) and does it adjust for the conductance of the lumber and use an effective R value of say R9?
If I use foam boards over the 2x4 with fiberglass batts how do I enter that? You need to figure your whole wall R-Value. You can calculate that as a ratio between the insulation and studs, or however you choose. The software uses the R-Value that you give it. So, R-9 doesn't sound that far off. Foam board: Again you need to decide on an R-Value to use, and use it for that category of wall.
Good Luck!
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....jc
If you're not building with OSB SIPS(or ICF's), why are you building? |
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gregj
Registered Users
Posts:132
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| 04/01/2008 10:22 AM |
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| Thanks PC, that will get me on track. |
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