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4 Answers

Panasonic ERV for the whole house

The Panasonic WhisperComfort claims it can be used for the whole house.

The 40 cfm rating is plenty for two people in a 1200 sq.ft. house

Has anyone seen a report or have experience that it does the job adequately?

$300 at WalMart makes it pretty compelling

In Mechanicals | Asked By Kevin Dickson, MSME | Sep 19 12
2 Answers

I had the copper pipes leading to the kitchen under the deck sprayed with foam.

I cannot recall if it was open or closed cell spray foam. The reason I had them covered with spray is because the pipes under the deck were exposed to the outside cold air and always in danger of freezing in the winter.

I now plan to add additional mineral wool insulation and cover everything with siding. My concern is whether the foam insulation will be harmful to the copper pipes or the drinking water supply. Your comments will be greatly appreciated.

In General questions | Asked By John NOWIK | Sep 23 12
3 Answers

What is the best synthetic roof underlayment available?

I have seen literally a dozen synthetic roof underlayments for asphalt shingles. The prices are all over the place. Is there a chart or magazine that compares the relative merits of each?

In Green products and materials | Asked By chris gaidrich | Sep 23 12
5 Answers

Ventilate dead space behind kneewalls

I have recently completed my attic renovation. We moved the insulation layer to the roof deck and brough our hvac inside the thermal envelope. We finished the space for an extra room.I now have keewalls on both sides of the room with a triangular space behind them with all the ducting/hvac etc. behind them. I did not provide any registers or returns to this dead space. Should I be concerned that there is no air movement or turnover in this space? I was thinking it might be wise to provide a louver through the kneewalls to allow some air movement.

In General questions | Asked By Rob McKenzie | Sep 19 12
2 Answers

Air Handler is a good option?

We are renovating an older 2 story home in the Hudson Valley NY (zone 5) We had a new high efficiency gas heating unit installed, and the installer recommends an air handler to distribute the heat on the 2 floor in lew of installing baseboard. The first floor already has baseboard heat.

This will be a rental, but a decent one I hope. His argument is that we could easily add air conditioning this way, and the cost is not that much different than the baseboard. We have a conditioned attic space to put the unit.

In Mechanicals | Asked By Nyle Phillips | Sep 22 12
8 Answers

What's so wrong about oversizing HVAC?

We're building a new home.

Yes, I've heard the advocates of right-sizing the A/C to keep the unit as small as possible. Take into account everything -- windows, ceiling ht, wall types (in our case, SIP with 6" foam, etc. Size system for max summer temps (in our case, 105 degrees a dozen or so days). etc. That way humidity is better controlled with a system that is constantly going during those maximum days.

In Energy efficiency and durability | Asked By Leonard Miller | Sep 20 12
2 Answers

Hardwood flooring

What specialized tool exists that can cut a groove into an unfinished hardwood floor board? Hand held router or is their a special blade that can be used on a table saw to cut out the groove?

In General questions | Asked By kevin haag | Sep 21 12
5 Answers

Looking for a NYC metro area fresh air systems contractor

I am in the process of buying a house, it closes next month. Its relatively new built in 2004 - but there aren't any special green features. I hope to change that gradually, starting with a fresh air system.

In Mechanicals | Asked By J M | Sep 21 12
10 Answers

Ultimate Air vs. Zehnder HRV

I recall seeing in the comments for the article discussing a new way to duct hrv's that one of the Zehnder reps was disparaging the Stirling Technologies Recoupaerator 200dx for having something to the effect of misleading, incorrect, etc. performance numbers and that it does not stack up to Zehnders products. I was wondering if that rep and anyone else could clarify why the Zehnder product would be better than the 200dx and how they differ in function? The cost of the 200dx is significantly less.

In Mechanicals | Asked By Spencer Burnfield | Sep 4 12
6 Answers

Installing 2 Vinyl windows with no nail flange in a 6" opening depth

I'm turning our sunroom into a finished space. The current slider windows are 2 be replaced by 2 vinyl single hung units (73" x 52"); each unit has a 2 single hungs and a vinyl joint between each to make it a solid unit.

The current sill is sloped 2x8. Based on my recommendations and manufactures install is to shim sill at 24" and jambs at 16" (only fastening the jambs).

They say if > 65" wide consider fastening through the still; but from the advice I've been given from contractor and rona is to not fasten on the sill as it could compromise drainage.

In General questions | Asked By Mike Tew | Sep 20 12
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