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3799 Main St. #87024
Atlanta, GA 30337


Advanced residential construction and home improvement consulting and owner's advocacy in Atlanta, using the latest building performance diagnostic and modeling techniques and tools. Airtightness, insulation, HVAC, ventilation, moisture, and air quality and EMF consulting for homeowners and building professionals alike.


Home performance articles and stories from the field with internationally respected building forensics guru Corbett Lunsford at the Building Performance Workshop. Hear new episodes of the Building Performance Podcast, see new videos from the Home Performance YouTube channel, and learn all about how diagnostic testing (more than an 'Energy Audit') can make home improvement and new home construction a proven process!

Filtering by Tag: water heater

Tiny House Plumbing Puzzle Took 2 Years to Solve

Grace McPhillips

The #TinyLab's plumbing system is highly efficient for water, electricity, and propane use, but it turns out that efficiency reduces the control over water temperature during different seasons. Corbett FINALLY solved the conundrum theoretically- but are the products available in the plumbing department going to perform as advertised?

Combustion Testing the #TinyLab

Corbett Lunsford

Corbett checks the flue gas temperature, contaminant makeup, and efficiency of the tankless water heater in the #TinyLab with a new Wohler A450. Learn more and order this tool at:

Best Home Improvement Showroom in the World: Sanders Home Services

Corbett Lunsford

Building performance testing expert Corbett Lunsford and Pete Sanders take you behind the curtain at the soon-to-be-opened Sanders Home Services showroom in Washington Township, New Jersey (outside Philadelphia). See the best hands-on demonstration of home performance outside the #TinyLab! Visit Sanders Home Services online at:

Do Tankless Water Heating Systems Perform Better?

Corbett Lunsford

Watch home performance diagnostics guru Corbett Lunsford test the performance of demand tankless water heaters, in the #TinyLab and in a big house.  You may be surprised to see that it doesn't work exactly as advertised.

What Spillage Looks Like from a Water Heater

Corbett Lunsford

Testing for "spillage" of combustion gases means making sure the bad stuff that's supposed to go UP the chimney doesn't come back DOWN.  It's a critical part of home performance analysis, according to BPI, RESNET, and everyone else.  If you don't know what it looks like, you might feel a little lost- let your old pal Corbett the diagnostics guy show you the single most awesome example of what you shouldn't see in your clients' homes!

PODCAST #49 THIS HOUSE SUCKS, BUT NOT VERY HARD: Brett Singer, scientist, shows us where depressurization testing has led us astray

Corbett Lunsford

Today we talk with Brett Singer, air quality scientist at Lawrence Berkeley National Laboratory, about the red herring of worst-case depressurization on combustion testing, and the actual hidden enemy in every home.

To download this episode or hear more, subscribe in iTunes or visit