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Vampire load surprise - garage door openers

I've been on a tear of late to eliminate or minimize standby loads. This arises from data revealing that during spring and fall, when HVAC…

Started by Curt Kinder in General Forum

90 Dec 15, 2013
Reply by Dennis Heidner

Water Water Everywhere

I am new to the business.  Went to a residence that has a mobile home that has an addition and metal roof.  This roof is about 8ft above th…

Started by James Murray in General Forum

4 Dec 14, 2013
Reply by Dennis Heidner

Third party testing rqmt

I'm interested to know if the State you live in requires Blower door testing of the residential building envelope on new construction? Here…

Started by Eric Sperline in General Forum

2 Dec 13, 2013
Reply by Eric Sperline

DHW thermosiphoning question

Good morning everyone, I was hoping you could help settle a debate. When choosing to insulate the cold water intake pipe on a HWH, is it ne…

Started by Rob Buchanan in Weatherization

2 Dec 9, 2013
Reply by Curt Kinder

Combustion Furnace BTU output

Does anyone have an inexpensive method to "clock" a combustion furnace to estimate BTU output similar to Natural gas, but for propane, kero…

Started by Ernest V.F. Hodgson in Weatherization

9 Dec 6, 2013
Reply by Bud Poll

Energy Efficiency Federal Tax Credit extension beyond 2013?

Has anyone heard of any news with some hope that Federal Tax Credits for HVAC and insulation will be extended beyond Dec 31 2013?  Accordin…

Started by Trevor Frick in General Forum

5 Dec 6, 2013
Reply by Dennis Heidner

Give the gift of building science!

Give your staff, colleagues and others on your list BPI's Building Science Principles (BSP) guide and certificate exam! 20% off the retail…

Started by Mike Kandel in General Forum

0 Dec 5, 2013

Standard Wall Thermal Upgrade Analysis

The left is a standard wall, 3/4" siding, 1/2" sheathing, batt insulation and 1/2" sheetrock, if you remove the siding and apply 1-1/4" of…

Started by Tom Mallard in General Forum

1 Dec 2, 2013
Reply by Bill Bradbury

Cycling Losses for Gas Furnaces

How much does cycling losses of a gas furnace reduce AFUE vs. Thermal Efficiency? Loss of efficiency for oversized AC units is well documen…

Started by Bob Blanchette in General Forum

4 Nov 30, 2013
Reply by Jan E. Graveamker

Should Homeowners with PV Get Paid Retail or Wholesale Prices for their Excess Electricity?

I've been doing some research, trying to get my arms around the problem of the longterm sustainability of renewable energy in the Unites St…

Started by Jim Gunshinan in General Forum

24 Nov 23, 2013
Reply by Dennis Heidner

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