NAR's public consumer advocacy website is HouseLogic. This month they are featuring an interesting twist to increase consumer interest in energy efficiency makeovers.  They've done some fantasy-inspired estimates for three big energy efficiency imp...

Fantasy aside, not sure I would replace historic windows, and for the average real house, today, in the US, the payback for insulation and air sealing would sure be a lot higher.

Interesting way to get the conversation started though!  What do you think about the story?

Tags: energy, estate, home, improvement, real

Views: 725

Reply to This

Replies to This Discussion

The Downtown Abbey HEP Partnership - I'm in

I calculate the saving for a 1x3m. single glazed window using the Glass and Glazing Federation's calculator at about £28 per annum which seems about right. I don't see how where the $274 figure comes from?

Interesting.  Can you send me the link you used?  Methinks their math is way off somewhere! Thanks.


Personally I don't think costs are a good way to evaluate overall efficiency.

For a building like this it will never be 'efficient', too many windows so a solution is to supply its heat w/o using the grid and that's fairly easy using thermal-fluids and storing them in insulated tanks for use on-demand to warm a room.

This means no grid power is needed to heat the whole building, one wouldn't necessarily need to replace the windows for this particular case.

So this would take some trough collectors on the roof heating the thermal-fluid system, it's similar to using steam except with the fluids they don't boil and don't freeze so the drawback is pumping as a need for power but none needed for the heat.

Doing this means the "costs" of heating the building will be the capital costs amortized over the payback and a small amount for maintenence, huge difference looking at it this way to pay-by-the-watt heating even with new windows.



Is there enough roof area on this "whole building" to come close to supplying enough BTU's?  Is there enough acreage on the estate to do that??  How many millions of BTU's per hour is needed?  If the building is 40,000 ft2, and it loses 30,000 BTU/ft/season - that is over a billion (with a B) BTU in a season.  

Maybe it has it's own coal seam on the property, or maybe their 1,000 acres of woods could come into play.

Next to impossible to make this efficient on any level. Reduce, reuse, recycle. Reusing and recycling the existing building materials may be the way to go.....from an energy efficiency perspective....

This building is a great example of something so lossy it really should get some solar-gain into the equation, some alternative to collect solar-thermal stored to use for the daily cycle and get off the need to burn anything for heat most of the year.

As a practical matter probably the only major efficiency measure would be air sealing. I bet there would be some good opportunities.

How many truck mounted blower-doors would it take to test that place? Think of the effort just to check the doors and windows and make sure all the interior doors were open. And the fireplaces covered.

The calculator is here:- It uses metric units.

This problem requires a pragmatic approach. My suggestions in order are:-

1. The installation of a biomass heating boiler system for heating using the estate renewable timber resource.

2. A solar hot water system probably roof mounted.

3. Gradual replacement of the glazing units with slimline warm edged DG units - 11-14mm. thick.

4. Attention to drafts at windows, chimneys, etc.

There probably isn't much scope for internal upgrading of wall insulation in this case but in other situations thin insulation systems such as Multifoil or Spacetherm can be used provided extra attention is given to ventilation of the existing structure.


Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

Latest Activity

Tom White's video was featured

Coping with Comfort Complaints: Top Causes, Investigation Methods, and Solutions

This one-hour webinar features Arlan Burdick and Andrew Poerschke talking about comfort complaints in well-built homes.
1 hour ago
Profile IconBob Lytle, Edward Burns, Nina Baird and 3 more joined Home Energy Pros
1 hour ago
Eric Kjelshus commented on Chris Laumer-Giddens's blog post Sparky Doubled the Air Leakage in this Home!
"What if after the building is sealed and tested.   The trades man would have to reseal all…"
13 hours ago
Colin Genge posted events
15 hours ago
David Downard replied to David Downard's discussion Blower Door for Sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Price is $1700. "
17 hours ago
David Downard added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase

Blower Door for Sale

MINNEAPOLIS BLOWER DOOR Complete system with DG700 Like new, its been used about 6…See More
17 hours ago
David Downard joined allen p tanner's group

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
17 hours ago
John Proctor commented on Chris Laumer-Giddens's blog post Sparky Doubled the Air Leakage in this Home!
"Nice job on the house -- bad job on Sparky's high tech hole."

© 2015   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service