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AC_Hacker · 04-27-11, 10:47 PM

Here are some heating degree days for some of the many past and present EcoRenovator posters.

I used this URL to get 5-year average degree day info.

I tried to get a variety of locations, and in most cases I needed both a city and state (or country). In a few cases, I just guessed.

higgy
Winnipeg, Manitoba
10422

Maxis
Riga, Latvia_
7800

Daox
Germantown, WI
7138

Piwoslaw
Warsaw, Poland
6722

Xringer
Woburn, MA
6412

Big Al
Glasgow, Scotland
6319

osolemio
Copenhagen, Denmark
6230

TimJFowler
Santa Fe, NM
5755

AC_Hacker
Portland, Oregon
4576

Hugh Jim Bissel
Dallas, Texas
2244
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if you are not included on the list, not to worry, I was trying for a variety of locations. You can go to the degree-day URL, find your average degree day, and cross check on the chart to find your own wall thickness.
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Then I took a look at this table which showed Passive House wall thicknesses for various locations in Europe.

I then found the heating degree days for each location mentioned on the chart, and did a point scatter of degree days vs wall thickness and did multiple curve fits on this data scatter and found that a linear fit was not perfect but still close enough to be very interesting.

So I used the formula from that linear fit, converted all cm wall thicknesses to inch wall thicknesses, and Applied it to the EcoRenovator list to see what Passive House wall thickness would be about right for their location's heating degree day figure.

So this chart should give you a rough idea of how thick your Passive House wall thickness might need to be. This assumes that a HRV of certified 80% or better efficiency was used, and that Passive house standards of insulating and sealing, etc were adhered to.

Kind of interesting don't you think?

(NOTE: data error has been repaired)

-AC_Hacker

04-27-11, 10:47 PM	#26
AC_Hacker Supreme EcoRenovator Join Date: Mar 2009 Location: Portland, OR Posts: 4,004 Thanks: 303 Thanked 723 Times in 534 Posts	EcoRenovator's heating degree days... Here are some heating degree days for some of the many past and present EcoRenovator posters. I used this URL to get 5-year average degree day info. I tried to get a variety of locations, and in most cases I needed both a city and state (or country). In a few cases, I just guessed. higgy Winnipeg, Manitoba 10422 Maxis Riga, Latvia_ 7800 Daox Germantown, WI 7138 Piwoslaw Warsaw, Poland 6722 Xringer Woburn, MA 6412 Big Al Glasgow, Scotland 6319 osolemio Copenhagen, Denmark 6230 TimJFowler Santa Fe, NM 5755 AC_Hacker Portland, Oregon 4576 Hugh Jim Bissel Dallas, Texas 2244 ?????????????????????????????????????????????????? ????? if you are not included on the list, not to worry, I was trying for a variety of locations. You can go to the degree-day URL, find your average degree day, and cross check on the chart to find your own wall thickness. &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& Then I took a look at this table which showed Passive House wall thicknesses for various locations in Europe. I then found the heating degree days for each location mentioned on the chart, and did a point scatter of degree days vs wall thickness and did multiple curve fits on this data scatter and found that a linear fit was not perfect but still close enough to be very interesting. So I used the formula from that linear fit, converted all cm wall thicknesses to inch wall thicknesses, and Applied it to the EcoRenovator list to see what Passive House wall thickness would be about right for their location's heating degree day figure. So this chart should give you a rough idea of how thick your Passive House wall thickness might need to be. This assumes that a HRV of certified 80% or better efficiency was used, and that Passive house standards of insulating and sealing, etc were adhered to. Kind of interesting don't you think? (NOTE: data error has been repaired) -AC_Hacker Attached Images __________________ I'm not an HVAC technician. In fact, I'm barely even a hacker... Last edited by AC_Hacker; 04-28-11 at 09:58 PM..