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Forum: Renovations & New Construction

12-04-13, 08:28 PM

Replies: 588

DIY Hydronic Floor Heating

Views: 514,721

Posted By mrd

If the efficiency and cost of heat pumps and...

If the efficiency and cost of heat pumps and photovoltaic cells continue to improve, it may turn out different than expected.

Forum: Renovations & New Construction

04-07-11, 04:16 AM

Replies: 588

DIY Hydronic Floor Heating

Views: 514,721

Posted By mrd

Random thought: It might be useful to have a...

Random thought: It might be useful to have a liquid with a vastly lower heat capacity than water in solar installations. If you also had mechanisms to both easily mix and separate the two liquids,...

Forum: Renovations & New Construction

02-27-11, 09:52 AM

Replies: 588

DIY Hydronic Floor Heating

Views: 514,721

Posted By mrd

The units conversion is a little confusing. ...

The units conversion is a little confusing. Let's try it this way, with known values to test:

R = t/k
R: Thermal resistance
t: thickness
k: thermal conductivity coefficient

This...

Forum: Renovations & New Construction

02-27-11, 01:15 AM

Replies: 588

DIY Hydronic Floor Heating

Views: 514,721

Posted By mrd

I suppose the comparison would be valid, if you...

I suppose the comparison would be valid, if you were to replace all of the soil around and beneath the basement with XPS.. although I'm not sure at what point you would stop replacing the soil with...

Forum: Renovations & New Construction

02-25-11, 08:24 AM

Replies: 588

DIY Hydronic Floor Heating

Views: 514,721

Posted By mrd

I've heard this is heavily dependent on ground...

I've heard this is heavily dependent on ground water. If there isn't ground water near the soil beneath the slab, then the earth acts as a huge insulation bank. Earth has a low R-value, something...

Showing results 1 to 5 of 5

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