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11 Answers

Strategies for a seasonal thermal energy storage (STES) cooler

STES = seasonal thermal energy storage.

I need a cold room for storing seedlings and bare root trees for 2-3 months of the year, from roughly the end of April to the middle of June. The temperature needs to be between 0.5 and 3. Humidity needs to be at 90% The cost of a conventional cooler system is unworkable, both because of the machinery, but also that I would need to upgrade my electrical service, as well as upgrade the power distribution line (700 feet) from the transformer to the proposed location.

In Green building techniques | Asked By Sherwood | Dec 9 15
1 Answer

Full crawl space encapsulation versus just a thick vinyl liner

I have a 20 year old house in South Carolina with a crawl space that I've lived in for a little over 3 months. The house currently has a 6 mil vaport barrier that is in pretty bad shape. Since then our area has had record rain and above average temps/humidity. I've checked under the house every few times it has rained and things usually looked ok. Fast forward to last week when we had another round of heavy rain and above normal temps I check under the house and it is absolutely soaked with water dripping from the piers, fiberglass insulation and beams.

In General questions | Asked By Chris Reynolds | Jan 8 16
2 Answers

Solar ITC Question--any CPAs lurking here?

At first read to a layperson (me), it makes perfect sense that pretty much anyone can install a solar PV system and qualify for the ITC (Investment Tax Credit). There's a residential version (we're all fairly familiar with this one, yes?) and a business version (see http://solaroutreach.org/wp-content/uploads/2015/03/CommercialITC_Factsh...

In Energy efficiency and durability | Asked By jonathan nagar | Jan 8 16
9 Answers

What have you used for siding/trim/etc?

I am trying to decide on the healthiest product to use for the exterior. I know it won't really affect indoor air quality if our house is air tight (which I hope it is), but I just really want to chose the product that is the least risky in terms of health. Hardie Board makes me leary because of the Silica. I know it is really only harmful when being cut and installed, but it just makes me nervous. What if we need to repair it or remove it and reinstall? I don't really want to worry about silica dust being everywhere with kids.

In Green products and materials | Asked By Carolyn Farrow | Jan 7 16
7 Answers

Existing non-vented crawl space conversion and mold

Hi Everyone,

In Green building techniques | Asked By S G | Jan 7 16
12 Answers

Blown in air duct sealing and individual run testing

My home has return air in the attic which is relatively accessible and supply air in the crawlspace, some of which isn't very accessible. I had a blower door and ducting tests that revealed huge leakage. we applied mastic to everything accessible and fixed a big leak. We retested and got down to about 25% leakage and at the point the contractor said it was the best they could do.

In General questions | Asked By Mark Renfrow | Feb 5 11
3 Answers

~10 degree difference between upstairs and downstairs rooms

I live in a 2 story single family ~1700 sq foot home where there is an uncomfortable 10 degree difference between the floors in the winter (too cold upstairs) and the summer (hot as hell upstairs).

We have a single thermostat on the main floor. Setting it to 72 in the winter leaves the upstairs around 65 and a sole bedroom in the front corner of our house is a few degrees cooler than that. That bedroom is what I need to address and it only has a single duct running to it. The temp slowly drops as the night goes on, leaving it quite chilly the next morning.

In General questions | Asked By Matt Duffey | Jan 6 16
17 Answers

Water-source heat pump sizing

My 2-ton Carrier water source heat pump needs replacing. It's a condo, so I own the heat pump & handler, but not the water loop. I think I'm going to replace with another Carrier, but I'm considering downsizing to a 1.5-ton unit.

In Mechanicals | Asked By David Hicks | Mar 19 15
6 Answers

Does anyone have experience with Dr. Energy SuperAttic?

I am considering having rigid foam board attached against the roof rafters (inside the attic). The sheets are attached and everything is caulked and sealed to make the attic within conditioned space. Obviously with this there is a lot of sealing details that have to be done right. I am considering it as an alternative to closed cell foam. I could do it myself with poliso or there is Dr. Energy franchises that do it . They call it SuperAttic. Does anyone have experience using foam sheathing this way or have had a SuperAttic installed?

In Energy efficiency and durability | Asked By Kyle | Dec 31 15
4 Answers

Crawl space encapsulation

Hello everyone,

In Green building techniques | Asked By Chris | Jan 6 16
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