All Blog Posts (849)

Measuring Matters

Perhaps the greatest challenge to promoting energy efficiency is that you can’t see it. People understand electricity produced from a PV collector on the roof, and a kWh meter can easily report precisely how much energy was generated. But with more-efficient products, savings cannot be directly measured; instead, one must reckon the difference between a real and a hypothetical situation. This complexity creates a lingering uncertainty whether the promised savings did or did not actually…

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Added by Home Energy Magazine on January 5, 2012 at 9:36am — No Comments

Texas Worried About Not Having Enough Electricity in 2012

2011 was a challenging year for the operators of the Texas electricity grid.  2012, however, isn’t likely to be any easier. This according to ERCOT who holds the responsibility of insuring the reliability of the Texas grid. There are a large number of power plants that are scheduled to be decommissioned over the…

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Added by Holbert Janson on January 2, 2012 at 7:54pm — 3 Comments

Ridge Vent . . . and Nothing But the Ridge

Can anyone convince me that this picture shows anything other than the fact that the ventilation provided here is effective only in the first five inches down from the ridge? And yes, there is continuous soffit venting that is baffled and open to the…

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Added by Ed Voytovich on December 29, 2011 at 12:20pm — 13 Comments

Today's Power Trip - Weatherization and Infrared Camera

by Don Ames,  www.detectenergy.com

Got a phone call from a Son today, he was down at the local Mall looking to exchange a shirt he got for Christmas. This is one of those times when I wish that cell phones would just go away. Why do we need to be in constant touch with everybody all the time?

"Yes son, I bought the shirt there and I don't know why I cut the tag off and I don't know what happened to the…

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Added by Don Ames on December 29, 2011 at 12:00pm — 3 Comments

home weatherization

I have a big bay window like 10'-11' wide and 4' high. At the winter time this window brings cold into the room. It is not convenient to weatherize this window from inside. I thought to cover it with plastic sheeting from outside. I have a brick walls around this window outside. I bought a frost king weatherseal clear tape for outdoor but it lasted only one week and refused to hold longer. I tried a gray duct tape but it lasted only one day and gave up. I looked what other people are using…

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Added by isaak goldman on December 27, 2011 at 12:51pm — 1 Comment

A Passivhaus Retrofit in Minnesota

A remodeling project in Minneapolis is on track to become one of the first in the U.S. to meet Passivhaus Institut’s EnerPHit standard

A Passivhaus Retrofit in Minnesota

Added by Guido Schuler on December 23, 2011 at 8:10am — No Comments

Making energy efficiency possible for middle-income homes

December 2011, Lawrence Berkeley Labs report for the EPA.  Very significant document that establishes how to make it desirable and feasible for financially stressed middle-income Americans to improve their energy efficiency through innovative government incentives.  Worth a read for any serious professional and has lots of useful data to back our arguments.…

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Added by Brion Battin Black on December 22, 2011 at 9:30am — 1 Comment

Videos from UK Passivhaus Conference 2011

From ipha:
Excellent videos on presentations from the UK Passivhaus Conference 2011 :

Videos from Passivhaus Trust

Added by Guido Schuler on December 22, 2011 at 8:01am — No Comments

from Ipha :Check out this first Greek TV broadcast on Passive House (after min 2:00)

from Ipha :Check out this first Greek TV broadcast on Passive House (after min 2:00)

spot

Added by Guido Schuler on December 22, 2011 at 4:00am — No Comments

Applied Passive-solar Structural Design

Passive-solar has been known to work well but certain things about our architecture fail the thermodynamic efficiency test and there are reasons why.

First is heat-transfer through conduction, the wood, drywall, sheathing all having rather high heat-transfer coefficients. Next is convection from a heat-riser which takes the warmth of the floor and moves it to the ceiling.

Until these are dealt with they cost a lot of energy, if one is trying to not require external heating for…

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Added by Tom Mallard on December 21, 2011 at 1:00pm — No Comments

Turn it on

Just discover huge saving possibility in commercial building. Its simple: maintain your AHU unit an TURN ON rotary heat exchanger gives you 5 000 EUR annual savings. Isn't it good Christmas present ? :)

Added by Nikolai Tihhonov on December 21, 2011 at 12:00am — No Comments

Dryer Problems: Inefficiency and Fire

Clothes Dryer Problems Can Lead to Inefficiency and Fire.

by Don Ames,   www.detectenergy.com

Story appeared in my local newspaper the other day about an apartment laundry room that had dryer problems. It occurred to me, being the highly trained home energy auditor that I am, that any clothes dryer that had such a problem that it would catch fire, must have been a very inefficient clothes dryer for a long…

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Added by Don Ames on December 18, 2011 at 11:03pm — 2 Comments

Merry Christmas to all!

Twas the night before Christmas, when all through the house

Not a cool draft was freezing, to wake up the mouse.

The owner called a contractor with knowledge so rare,

In hopes that great comfort soon would be there. 

The children were nestled all snug in their bed,

With nary a cough or a cold in their heads.

And Momma in her Kerchief and I in my cap

Had just settled down for a long winters nap. 

When from my neighbor there a rose such a…

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Added by Pat Dundon on December 17, 2011 at 9:00am — 2 Comments

Energy Efficient House: Common Sense Guidelines

Energy Efficient House: Common Sense Guidelines to Energy Conservation.

by Don Ames,   www.detectenergy.com  The security of home energy conservation and the Energy Spy Insider.

Think of the ways we try to separate the outside climate from the inside climate. In a nut shell, that is the goal of an energy efficient house. Take a snowmobile or a dog sled and you will see a domed home made out of snow and ice.…

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Added by Don Ames on December 16, 2011 at 12:29pm — No Comments

On-bill financing: Why isn't everybody doing it?

If someone told me they could improve the efficiency of my computer so that it operates quicker, at no extra cost to me, I can’t imagine I’d turn them away. Yet, the energy efficiency industry offers a similar option for homes and businesses and at least so far, consumers aren’t flocking to the programs.

On-bill financing gives customers the ability to finance energy efficiency improvements made to their homes and businesses at no upfront cost. Customers pay for the insulation,…

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Added by Elisa Wood on December 16, 2011 at 8:22am — 2 Comments

Calling All Inventors, Entrepreneuers, and Venture Capitalists!

One morning I realized that I could cut down my showering time by at least one minute if I could combine my shampooing and conditioning into one step. Inspired, I went to a high-end grocery store that I will call, “Whole Paycheck” looking for what has been an illusive item for me—a combination shampoo and conditioner that really works; someone stacking items in the hair-care section told me that no such thing exists.

It’s a tough invention, since shampoo and conditioner are supposed…

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Added by Jim Gunshinan on December 14, 2011 at 3:11pm — No Comments

Part 2 of: The "1-2 Punch" to HVAC "Not Understoods"

Proper sizing of HVAC equipment is smaller, and smaller means more comfort.

Probably the usual thought in the HVAC industry by technicians is that the units need to be made bigger for comfort. Perhaps this comes from the idea of coming home from work, and needing a set back thermostat to do its magic, and get the home comfortable fast,…

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Added by Christopher Cadwell on December 13, 2011 at 8:30am — 4 Comments

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