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6 Answers

Closed crawlspace ventilation choices

I'm in the process of closing my 900 sqft crawlspace and need to find a way to ventilate the space. One thought I had was to use the old oil furnace chimney/flue as a way to send the air up and out with the help of a small(20cfm) bath fan. The flue is centrally located and close to an existing outlet. Or is it better to seal the flue (or remove it all together) and duct the air through the foundation wall.
Particulars:
zone 4 asheville nc
house built in 1969
neighbor had his crawl space tested for radon and was negative.
13mil barrier sealed to block wall

In Energy efficiency and durability | Asked By terrell whitworth | Jan 23 15
6 Answers

How to insulate a block house?

i am rebuilding a small block house with a full basement in Northern Ohio. After researching the forum it seems like the consensus is to insulate the outside. My concern is that moisture in the walls from the ground or footings/slab will need to escape to the inside of the house since the rigid insulation XPS will create a vapor barrier on the outside. Any feedback or suggestions will be helpful. Jay

Buildintegral@gmail.com

In General questions | Asked By jay cooper | Jan 23 15
9 Answers

Should I install electric tankless hot water, a heat-pump water heater, or solar hot water?

So I'm in the process of specing out and finishing design on a Deep Energy Retrofit/Whole House Remodel on an old 1858 farmhouse.

House Demographics
We are in Zone 6a - NH.
PERSIST Technique is being used throughout.
R20 slab/R20 Sandwich Foundation walls/R40 above grade walls/R60 roof
We will have 9.3 kW of PV solar, and our current plans include two Solar Thermal Panels and and 80gallon Steibel-Eltron Water Heater/Storage Tank for our domestic hot water.....

In General questions | Asked By brad hardie | Jan 23 15
8 Answers

WRB - Ice & Water Shield or Grace enV spray-on (to breathe or not to breathe)?

Zone-6A building a PERSIST type home with 8" of Neopor on the exterior. Should I wrap the sheathing in Grace Ice & Water or use a spray on WRB like Grace enV. The Ice & water doesn't breathe, and the enV does. No vapor barrier on the inside and currently there are no plans to insulate in the stud cavities.

In General questions | Asked By brad hardie | Jan 26 15
1 Answer

Insulation

Hi. I am trying to renovate a 65 year old house. It is a 2 story house. The second story has a 4 foot vertical wall and then it turns into the roof. The slope is about a 10/12 slope. What I would like to know is whether or not I should treat the slope as a wall or as a roof for insulation purposes? If it is to be treated as a roof would I have to leave space for airflow? Right now I have diagonal cross bracing between the rafters. If I need air flow I would either have to remove these braces or drill holes through them.

In Energy efficiency and durability | Asked By Floyd Hillier | Jan 26 15
11 Answers

LPG infloor heat with HWH with a heat exchanger in the HWH is too expensive to run!

I have the above home on a monolithic slab. ...LPG to run the HWH and a heat exchanger pipe running through the HWH to heat my floor...TOO DANG EXPENSIVE TO HEAT MY HOME THAT WAY! Suggestions on how to make it more efficient would be appreciated. A air to water heat pump? A heat pump water heater with a heat exchanger pipe running through the HWH? A solar system of some sort?

In GBA Pro help | Asked By Ed Jones | Jan 25 15
8 Answers

Rigid foam on inside of stud cavity?

Looking to maximum the insulation levels as high as I can and not use spray foam due to price.

In Green building techniques | Asked By kurtis wiedmann | Jan 25 15
4 Answers

SHGC high-solar-gain windows current list

Could we list a few US window companies where SHGC windows are available?

Also 2115, what window company are all of you using, in my area, (northern US)

My climate 6A

My area Andersen, Pella are the higher end choice, mainly because that's what's our lumber yard promotes. Some Marvin... The tract builders have lesser known names, all vinyl. I will list them after I get some names.

I only know of one other builder that cares about windows with high solar gain.

In Energy efficiency and durability | Asked By aj builder, Upstate NY Zone 6a | Jan 25 15
2 Answers

I need to replace my gas furnace

Hello to everybody at GBA.

My gas furnace and AC system is starting to get old and I'd love to replace it with a heat pump. As I already have ducts, it seems to me that a ducted system would be best, but I can't figure out if that would really work.

In Mechanicals | Asked By Martin Holladay | Jan 26 15
2 Answers

Home Depot Offers High SHGC Glass

I just ordered some windows for the south side of a pretty good house in Colorado.
U=.26, SHGC=0.69

Under $300 for a big fixed vinyl window from Jeld-Wen.

When you sit down with somebody in the millworks dept., just make sure you get the Cardinal LoE-180 glass. Careful, they might try to talk you out of it, because they don't understand passive solar energy.

http://www.cardinalcorp.com/products/coated-glass/loe-180-glass/

In Green products and materials | Asked By Kevin Dickson, MSME | Jun 17 14
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