Forum: Conservation
12-23-21, 04:01 PM
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Replies: 22
Views: 62,636
There are two basic sizes available - 2kW and...
There are two basic sizes available - 2kW and 5kW. The capacity claims are inconsistent, and often incorrect. Those that are advertised as 8kW are really 5kW heaters. Some that are claimed to be...
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Forum: Appliances & Gadgets
05-06-20, 10:02 AM
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Replies: 7
Views: 17,432
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Forum: Geothermal & Heat Pumps
01-11-20, 10:42 AM
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Replies: 18
Views: 13,171
Good choices. Get a gas fireplace that is...
Good choices. Get a gas fireplace that is efficient at heating the rooms, not one that is just made for looks. That way you will have a good source of backup heat if you lose power.
And, for...
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Forum: Geothermal & Heat Pumps
01-10-20, 09:57 AM
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Replies: 18
Views: 13,171
Thanks for the thoughts.
I wouldn't call the...
Thanks for the thoughts.
I wouldn't call the indoor units "air handlers." They are maybe 35" wide, 8" deep and 11" high, with a small fan and coil inside. The fan motor is a permanent magnet,...
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Forum: Geothermal & Heat Pumps
01-10-20, 09:08 AM
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Replies: 18
Views: 13,171
OK. I live in MN, and agree with the guys that...
OK. I live in MN, and agree with the guys that say that a radiant floor is the most comfortable form of heat. That said, with a design day of 40 where you live, I doubt that radiant heat would do...
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Forum: Lighting
02-18-19, 06:31 PM
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Replies: 26
Views: 42,605
Well, I said it before, but will say it again....
Well, I said it before, but will say it again. The number came from PVWatts. This is the gold standard tool, from the National Renewable Energy Lab, NREL. Since you used Sacramento, so did I. I...
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Forum: Lighting
02-18-19, 07:08 AM
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Replies: 26
Views: 42,605
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Forum: Lighting
02-16-19, 08:23 PM
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Replies: 26
Views: 42,605
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Forum: Lighting
02-16-19, 02:13 PM
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Replies: 26
Views: 42,605
Well, a 75% cutoff would then require (4) 24...
Well, a 75% cutoff would then require (4) 24 series batteries. That is too many to safely wire in parallel, in my opinion. I agree that the battery will last longer, but suggest using batteries...
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Forum: Lighting
02-15-19, 11:04 PM
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Replies: 26
Views: 42,605
Pool Man, there are a couple of things to...
Pool Man, there are a couple of things to consider regarding sizing of the battery and the panel.
1) How many days do you want the light to operate in the absence of sunlight?
2) How fast do...
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Forum: Renovations & New Construction
08-29-18, 08:35 AM
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Replies: 5
Views: 12,540
Drake, I'm with you. I think some of the...
Drake, I'm with you. I think some of the responses were thinking you were talking about spacing between the pipes, but I think you were talking about the length of the run.
Shorter runs will give...
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Forum: Solar Power
08-29-18, 08:07 AM
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Replies: 16
Views: 27,257
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Forum: Geothermal & Heat Pumps
01-26-18, 10:58 AM
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Replies: 23
Views: 17,633
Why do you need a 4-port? You should easily be...
Why do you need a 4-port? You should easily be able to do this with a standard 3-port valve. Hot water goes in one inlet, return teed into the other inlet, and circulating pump for the zone on the...
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Forum: Geothermal & Heat Pumps
07-20-16, 11:54 AM
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Replies: 1,943
Views: 5,234,522
Just an engineer here, AC. When others argue...
Just an engineer here, AC. When others argue over whether a glass is half full or half empty, we engineers just figure that the glass was made twice as big as it needed to be.
There are...
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Forum: Geothermal & Heat Pumps
07-19-16, 06:07 PM
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Replies: 1,943
Views: 5,234,522
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Forum: Geothermal & Heat Pumps
07-19-16, 11:21 AM
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Replies: 1,943
Views: 5,234,522
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