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3 Answers

Desuperheater water heater

I always understood that if you had a GSHP with a desuperheater, that your water heater should be an electric tank type. A client we are designing a home for would prefer a gas tank over electric, and our MEP engineer has not suggested that this would create any issues. Please advise.

In Mechanicals | Asked By Heather Gayle Holdridge | Nov 19 15
7 Answers

Obscured glass entry door and solar heat gain

This is a weird question, but who else would I ask, but all of you. I want to know if there is privacy glass that still offers decent solar heat gain, and if one type is better than another.

The front of my home faces South and also faces the street on a city block. I want a glass entry door for natural light and solar heat gain in the winter (yard is shaded in summer) Provia makes Quad pane doors 2.5" thick that seem like they might fit the bill with U values as low as 0.13 (the same as my windows, coincidentally): http://www.proviaproducts.com/productdetail/entry-doors/embarq-glass

In Green building techniques | Asked By Ryan | Nov 17 15
1 Answer

Best approach to insulate rooms in a timber frame barn.


In Energy efficiency and durability | Asked By Maciej Szefler | Nov 19 15
2 Answers

Moisture on my pole barn concrete floor

Inside my pole barn the concrete floor always feels damp. When we poured the floor years ago poured it over gravel. Someone said to me that I should have put a vapor barrier down like a sheet of plastic then poured over top of that. Well it's too late and I am in the process of making a little office inside my building and I don't want to have moisture issues in that room. What are some of my options? Thank you Anthony

In General questions | Asked By Anthony Grelli | Nov 18 15
1 Answer

New HVAC problems

I recently had my hvac system and all flex duct replaced due to age of unit and mold throughout. I live in a Florida 1930's home and the ducts are in the crawl space under the house, also we have had a problem with critters making holes in the ducts.

In GBA Pro help | Asked By Deidre Epperson | Nov 17 15
15 Answers

Sleeping coves betters than medium sized bedrooms?

I redesign old homes and rent them out. I found hallways are your worse enemies in use of space. It was not until this last year that I noticed hallways in my rentals that I didn't mean to make.

Lets take a bed of roughly five foot by seven foot for example. If I put this bed in the middle of the room with the headboard on a wall and put three feet around the bed I get a 11 foot by 10 foot bedroom. A typical bedroom size plus or minus. In this typical bedroom I have a roughly five foot by two foot closet.

Current Rental / Bedroom / Square Footage

In Interior design | Asked By S E | Oct 13 14
3 Answers

Zoned HVAC and dampers — Opinions?

Townhome has a zoned (3-levels) HVAC system. This system contains four trunk lines off the supply plenum one of which contains a weighted (manually adjusted) damper that was originally routed back into the supply plenum. This weighted damper is designed to provide bleed off air when less than 3 zones are in use.

You would adjust the damper by so that is operated as follows:

3-zones in use (damper is basically closed)
2-zones in use (damper partially open)
1-zone in use (damps is slightly more open vs 2 zones in use).


In Mechanicals | Asked By Chris M | Nov 18 15
3 Answers

Downloading Details

Details will not open in Autocad LT 16
Any Advice?

In GBA Pro help | Asked By Carole Coelho | Nov 18 15
7 Answers

Need a stealthy ERV installation

Hi, I own a 1450 SQFT home that has been spray foamed throughout (walls, attic, etc.) and has decent triple pane windows, but minimal to no passive solar due to orientation and surroundings. Although the home is 75 years old, a blower-door test revealed its tighter than most new builds, so I need a ERV as soon as possible. I chose an ERV over an HRV due to the humid summers and long dry winters here in MN. The home has a 96% efficiency gas furnace and central AC. The furnace has a multispeed fan.

In Mechanicals | Asked By Ryan Griffin | Oct 23 15
2 Answers

How to use polyiso as interior insulation on a pole barn?

I have an unfinished pole barn with board and batten siding in Pennsylvania. I'd like to insulate the inside with polyiso panels, because that way I won't have to frame out the walls, and the polyiso will create a handy air barrier and thermal break. I can also find used 3" panels for ~$20 around here. My plan is to glue 3 inches of polyiso directly to the inside of the Purlins, tape the seams, then screw OSB, plywood, or drywall on top with long screws. These screws will go all the way through the foam to the barn's 2x4 purlins.

In Green building techniques | Asked By Jack | Nov 17 15
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