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: 648

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.

 

Tom

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:- http://www.ggf.org.uk/energy-savings-calculator. 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.

RSS

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.

Latest Activity

Richard Vito joined Kyle Brown's group
Thumbnail

Wrightsoft - Manual J / Manual D

If you use Wrightsoft to calculate loads or design ducts, you likely have questions.  Get answers…See More
1 minute ago
Richard Vito joined allen p tanner's group
Thumbnail

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
1 minute ago
Jim Gunshinan commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"I had a revelation while attending Bruce Manclark's session of duct leak testing at the Energy…"
14 hours ago
George J. Nesbitt commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"Blower Door; the 2007 test was a depressurization test, and the 2014 a pressurization test, which…"
14 hours ago
George J. Nesbitt replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Plan, plan, plan, plan. The 1st step to is to understand the house, how it's built, the…"
14 hours ago
George J. Nesbitt posted an event

High Performance Windows - A Panel of Experts at Pyramid Alehouse`

April 26, 2014 from 3pm to 5pm
Join a lively panel discussion on high performance windows. We'll cover some basics, as well as…See More
16 hours ago
Kaushal Bharath Raju replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Hi David, Thanks for pointing out Martin Holiday's article. I do not wish to engage in the…"
16 hours ago
Profile IconAdam Penberthy, Scot Davidson and j jarvella joined Home Energy Pros
16 hours ago
David Eakin replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"More food for thought on this subject - read this (fairly) recent blog by one of the most respected…"
21 hours ago
Curt Kinder commented on Christopher Morin's blog post 5 Things New Energy Efficiency HVAC Contractors Need to Know
"You left out air distribution...Without at least a passing glance at how much air moves through the…"
yesterday
David Eakin replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"I mis-spoke - I was referring to the Midori House in Santa Cruz. Have an in-depth discussion with…"
yesterday
Kaushal Bharath Raju replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Hi David & Bud, $400/sqf > $300 sqf. The latter is the minimum cost of new construction in…"
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service