Energy Savings with Interior Air Panels
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Haldis Fearn



Joined: 14 Sep 2008
Posts: 42
Location: San Leandro, CA

PostPosted: Thu Mar 12, 2009 6:37 pm    Post subject: Reply with quote

John and all

Just thought I would way in with our experience. Based on John's interior storm window design we built interior storms for all the aluminum windows in our house. We have 20 of them. We covered all but three which we use for ventilation purposes. We just got the latest gas bill and we reduced our bill from $302 to $105. We used 21% less gas than in previous years for the same period. The amount we saved has already paid half the cost of building them.

I have to admit we cheated somewhat in that I had two full rolls of stretch wrap left over from wrapping the exterior wood pillars and the cost of clear plastic sheets was way over my budget at this time. So we wrapped the wood frame and overlapped the stretch wrap about six inches on each wrap. This actually created an air pocket between the stretch wrap on both sides.We then used clear tape around all the edges before we put the double stick tape and the half rods on. Makes for a little wavyness when you look out, but most of the windows have sheers and no one can tell.

Haldis
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jade



Joined: 11 Feb 2005
Posts: 785
Location: Hawley MA

PostPosted: Thu Mar 12, 2009 6:42 pm    Post subject: Reply with quote

love to hear this kind of feedback--thanks! how cold does it get in your neck of the woods?
...jade
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Haldis Fearn



Joined: 14 Sep 2008
Posts: 42
Location: San Leandro, CA

PostPosted: Thu Mar 12, 2009 6:54 pm    Post subject: Reply with quote

Jade - we live across the bay from San Francisco, just below Oakland. We actually don't get super cold weather. Getting down to 30 only happens a ten to 12 nights in the winter. I also have to say that we keep our heat at 60 degrees at night and only 65 during the day on the upstairs furnace as I work from home. Downstairs only goes to 63.

But I figure if I see that dramatic a drop that someone where it's much colder might see an even greater savings. Haldis
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TDL



Joined: 13 Dec 2008
Posts: 253

PostPosted: Sun Mar 15, 2009 1:40 am    Post subject: Reply with quote

johnleeke wrote:
Do you know of any projects where they have received EnergyStar tax credits and saved their original primary wooden sash? It is clear that simply adding certified exterior storms and interior air panels would work with the EnergyStar credits. If a window specialist is installing certified storms, could the restoration of the primary sash (say sash joint repairs, glazing and painting) also qualify for the energy tax credits? Probably not. What if the window specialist's contract included exterior storms, could the window specialist simply charge enough for the storms to cover the sash work, then could the owner get the tax credit based on the whole contract? Is the tax law tied to some standard pricing for the certified product? Or, are resellers able to charge whatever they want for installing the certified goods?


The tax credit is ONLY good for product. You can charge what ever you want for the product. The catch is you can only get the credit if you keep the window sticker. Most times the sticker goes in the trash. With the stimulus credit it lowered the standards even lower then energy star. Now it is a .30 U value and a .30 SHGC

My new wood single glazed windows do not qualify even though in 10 years they will insulate better then a vinyl window, in 25 years they can be repaired rather then replaced, in 50 years they can be restored rather then be on the second set of replacements. Where is the savings with the replacements?


Last edited by TDL on Sun Mar 15, 2009 9:25 am; edited 1 time in total
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jade



Joined: 11 Feb 2005
Posts: 785
Location: Hawley MA

PostPosted: Sun Mar 15, 2009 7:33 am    Post subject: Reply with quote

i don't know where the savings are but i do know where they aren't--in the bank!
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johnleeke
Site Admin


Joined: 20 Aug 2004
Posts: 2939
Location: Portland, Maine, USA

PostPosted: Sun Mar 15, 2009 5:06 pm    Post subject: Reply with quote

Haldis:

Thanks for reporting on your energy savings. I'd like to do some follow up on this with you. In running calculations on energy savings there are variations based on weather differences between the two comparison time periods. Using "Heating and Cooling Degree Days" data the weather deferences are taken into account, making the comparison more accurate. The data and a calculator are available at:

http://www.degreedays.net/

If you want to do this and/or need help give me a call, or we can work through it here on the Forum.

Your case is important and, with your permission, I'd like to write it up for my new windows book.

_________________
John

by hammer and hand great works do stand
by pen and thought best words are wrought
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Haldis Fearn



Joined: 14 Sep 2008
Posts: 42
Location: San Leandro, CA

PostPosted: Sun May 10, 2009 10:59 am    Post subject: Reply with quote

John - my apologies, I just saw your message. I'm not sure how to use the index so have only been looking for the latest messages on the front page.

Absolutely would be happy to help. I will give you a call tomorrow and ask for your help doing the calculations - math not being something I do well.

Haldis
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Haldis Fearn



Joined: 14 Sep 2008
Posts: 42
Location: San Leandro, CA

PostPosted: Thu May 14, 2009 11:32 am    Post subject: Reply with quote

John - attached is the info on our gas use. I think I captured everything you wanted, but if not let me know. Haldis


gas useage.doc
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johnleeke
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Joined: 20 Aug 2004
Posts: 2939
Location: Portland, Maine, USA

PostPosted: Thu Aug 16, 2012 7:55 am    Post subject: Reply with quote

Haldis reports on his second round of air panel work using different plastic sheeting over here:

http://www.myoldhouseonline.com/xn/detail/2114602:Comment:87041

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John

by hammer and hand great works do stand
by pen and thought best words are wrought
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