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Search: Posts Made By: mrd
Forum: Lawn and Garden 01-27-14, 07:54 PM
Replies: 6
Views: 1,669
Posted By mrd
http://docs.engineeringtoolbox.com/documents/1147/...

http://docs.engineeringtoolbox.com/documents/1147/plastic-pipe-pressure-loss-diagram.png

Looks like 1/2" @ 3GPM ~ 3.8psi/100'
3.8psi x 125'/100' = 5.7psi, so your 5.5psi value checks out.
...
Forum: Geothermal & Heat Pumps 03-04-13, 10:30 PM
Replies: 15
Views: 3,433
Posted By mrd
What it 'posts' is the value passed to the...

What it 'posts' is the value passed to the function Serial.println. That function name indicates you are utilizing the serial port to print a line.

The value you are passing in your new code is...
Forum: Geothermal & Heat Pumps 02-13-12, 08:41 AM
Replies: 11
Views: 5,904
Posted By mrd
Heat pump COP degrades as outdoor temps drop. ...

Heat pump COP degrades as outdoor temps drop. Just a result of the fixed outdoor heat exchanger surface area and limited min refrigerant temperature inside of it. Basic thermal physics I suppose.
...
Forum: Renovations & New Construction 02-10-12, 11:31 AM
Replies: 165
Views: 33,396
Posted By mrd
I believe IRC code minimum is 5/8" penetration of...

I believe IRC code minimum is 5/8" penetration of wood studs. So 1-1/4" would be the bare minimum for 5/8" rock. And that's with screws 12" on center, max. But, is this for a garage ceiling below...
Forum: Solar Heating 12-07-10, 02:10 PM
Replies: 23
Views: 9,494
Posted By mrd
I am interested in seeing solar water(or other...

I am interested in seeing solar water(or other liquid) heating being made more versatile and applicable. Let's simplify the concepts and the systems to reduce the barriers to entry for parties...
Forum: Renovations & New Construction 11-26-10, 04:43 AM
Replies: 19
Views: 9,855
Posted By mrd
EPS vs. XEPS...

EPS vs. XEPS (http://www.dyplastproducts.com/newsletter/more_xpseps.htm)

Extruded is referred to as XEPS or XPS.. Expanded is EPS. Colored stuff is XPS. This thread is going to confuse people :o
Forum: Renovations & New Construction 08-28-10, 06:56 AM
Replies: 165
Views: 33,396
Posted By mrd
You could insulate the inside of the block wall. ...

You could insulate the inside of the block wall. Either a short insulated framed wall in front of it, or more rigid foam. I'd guess the block wall wicks water from the ground, in which case I'd...
Forum: Renovations & New Construction 08-17-10, 04:57 AM
Replies: 165
Views: 33,396
Posted By mrd
Have you heard of solosider...

Have you heard of solosider (http://www.solosider.com/)? If I ever had to hang hardi alone that's what I'd try using. Might be worth looking at.

Also you mentioned having it well insulated to...
Forum: Renovations & New Construction 08-10-10, 01:14 PM
Replies: 165
Views: 33,396
Posted By mrd
It'd be nice if there was an easy calculation to...

It'd be nice if there was an easy calculation to optimize windows on the south face, but there are many variables.

It is a trade-off between introducing additional heat load in the summer to be...
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