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3799 Main St. #87024
Atlanta, GA 30337
USA

773.398.5288

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.

Videos/Podcasts/Articles

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: home

Home Build Plan for Indoor Chemistry

Corbett Lunsford

Home Diagnosis hosts Grace and Corbett Lunsford discuss the simple approach to controlling indoor chemistry, and how exactly they plan to do that in their own family home.

Subscribe to Healthy Indoors Magazine at: http://HealthyIndoors.com

More on this house at: http://HomeDiagnosis.tv/atlanta-homestead

Retrofit Series Continued: Addition and Progress Test

Corbett Lunsford

Corbett shows the (slow) progress on the 1960's performance retrofit with the install and testing of the addition. Featuring ZIP System paneling.

See the other videos in this series here:
https://youtu.be/iciAPohuLNM
https://youtu.be/YDXk8ObHBWU

5-Layer Slab for High Performance House

Corbett Lunsford

Home Diagnosis TV series co-host Corbett Lunsford shows the installation of the 5 layers of performance control under his family's new house. Thanks to Royal Building Products, Rockwool Insulation, Stego Industries, and the subcontractors who worked so hard to get this right! More at: https://HomeDiagnosis.tv/atlanta-homestead

High Performance Crawlspace Walls

Corbett Lunsford

Corbett, Grace, and their crew of awesome nerds pour a high performance crawlspace foundation wall and totally skip the slump test, on purpose, which they know will get a lot of loving kindness in the comments section.

More at: https://HomeDiagnosis.tv/atlanta-homestead

Retrofitting for Performance: Crawlspace Encapsulation

Corbett Lunsford

Using 475 High Performance Building Supply materials, Corbett and his dad are encapsulating the vented crawlspace of a one-story ranch home in Atlanta. See what a difference the improvements make to the test data from the Ultra-Aire Sentry system and the blower door.

“Airtight" Buildings Debunked by HOMEChem

Corbett Lunsford

I've been telling people that the 475 High Performance Building Supply membranes I build with are airtight but vapor open for years. Turns out, sometimes I'm an idiot. Here's the real deal. Featuring Delphine Farmer and Marina Vance of the HOMEChem Experiment.

For more on Intello: http://foursevenfive.com

For more on HOMEChem: http://HomeDiagnosis.tv/homechem

Our Atlanta High Performance Home Build Part 1: Basis of Design

Corbett Lunsford

Corbett talks through the basis of design for his family's upcoming house construction in Atlanta, GA. Subscribe to stay tuned for videos during the build! To learn more about the high performance building products being used, click below:
475 HIGH PERFORMANCE BUILDING SUPPLY
GEORGIA-PACIFIC FORCEFIELD SHEATHING
ROCKWOOL INSULATION
FANTECH VENTILATION
MITSUBISHI ELECTRIC COOLING & HEATING
ULTRA-AIRE VENTILATING DEHUMIDIFIERS
CHRONOMITE POINT-OF-USE WATER HEATERS

Understand HOMEChem in 30 Seconds or Less

Corbett Lunsford

From the video team that created Home Diagnosis comes the documenting of HOMEChem (House Observations of Microbial and Environmental Chemistry), the Alfred P. Sloan Foundation's historic indoor chemistry campaign at the University of Texas at Austin. Learn more at: https://HomeDiagnosis.tv/homechem

Risinger and Lunsford at the HOMEChem Test House

Corbett Lunsford

Corbett talks with high performance builder star Matt Risinger about what HOMEChem could mean for his business. Shot by Joey Puterbaugh at the University of Texas at Austin Pickle Research Campus. Matt Risinger's channel is: https://www.youtube.com/MattRisinger

Insulating the High Performance Dry Room

Corbett Lunsford

Part 2 of building the #DryVault- the world's highest performance tool shed, in Atlanta. See Corbett insulate it to Grade 1 quality with Roxul Comfortbatts! For more on the insulation material, check out http://www.roxul.com/

How to Ventilate the #TinyLab (aka How To Pull Your Hair Out)

Corbett Lunsford

From the beginning, we've planned on this high performance tiny house on wheels (THOW) being airtight. That's a no-brainer, and everyone else wants airtight homes too, whether they know it yet or not. If you want to see how bright-eyed and bushy-tailed we were when we started planning the Tiny Lab, check out this webinar on the HVAC design:

After airtight construction, the next important step is always making sure the home is VENTILATED right, with fresh air in just the right amount. Too little fresh air, and you get staleness, odors, condensation, and a deep-seated disgusting feeling. Too much fresh air, and you're flushing conditioned air down the toilet.  The calculation for determining how much fresh air any house needs is called ASHRAE 62.2-2013, and you can see a simplified breakdown of that here:

And finally, you need to decide How Exactly You're Going To Do This.  That's always the sticking point, and designing and building this tiny house on our own has taught us that all day, every day. The devil's in the details. So began our ventilation adventure, and we immediately talked with our longtime friends at Panasonic, who recommended three pieces of equipment:

The ventilation strategy we were planning on initially was to exhaust air (20cfm minimum) from the shower (at the top right), which is only a few feet away from the kitchen (the L-shaped cabinet just below it), and supplying fresh air at the rear of the tiny house, in the underloft bedroom (at bottom).

We immediately faced a challenge with pressure equalization. Since this tiny house would be so airtight, the results of the blower door test would likely be less than 67cfm@50Pascals (2.0 ACH50). Without all the mumbo jumbo, that means that if I ran a regular exhaust fan in the bathroom or kitchen at anything close to 70cfm, I'd be sucking so hard on the house it would be as if a 20 mph wind was blowing on every single surface of the house (and that's a lot of surface- about 1000 sq. ft.)

Also, while the WhisperGreen bath exhaust fan can be 'manifolded' (which means connecting a duct system to the fan to distribute the air wherever you want it), the spot ERV cannot. A really cool MacGyver hack was recommended by Panasonic's technical team, which I think is awesome and could easily be done by anyone else per the instructions:

Although this is all very cool, it was deemed too iffy to work properly for the Tiny Lab because of all the customizations we're making with the on-wheels aspect, the tightness, the tiny size, etc. 

To keep this story from being ten pages long, let me just say that we are now on our FOURTH and final ventilation plan. Lawrence Berkeley National Laboratory's Brett Singer and our favorite dehumidification guru Lew Harriman both strongly urged us to use a fully-ducted HEAT Recovery Ventilator instead of the ENERGY Recovery Ventilator (which exchanges both heat and humidity). We'll be fighting the humidity the whole way, since every shower, cup of tea, and exhale will add to the moisture in the tiny house.

Also, we all agreed it would be infinitely better to exhaust the stovetop gases directly to outdoors with an ENERGY STAR kitchen exhaust hood.  We're keeping the pressure imbalances in check with a hole in the wall controlled with a mechanical damper that's activated by pressure imbalances.

Our final ventilation strategy is from our Product Partner BROAN, and we'll show you exactly how that miracle cure works when the system arrives next week!  Thanks for tuning in, and for your support in these trying times. Whew.

PODCAST #74 SAFE, HEALTHY, AND TESTED: BPI's Larry Zarker means home performance, not VD

Corbett Lunsford

Today Corbett talks at the Habitat X thinktank with BPI CEO Larry Zarker about his passions: helping contractors, building homes that stop sending you to the emergency room, and how to infiltrate the health insurance industry to help make all that happen. Sponsored by the 6-week Fall Fast Track distance mastermind course for home performance black belts.

To download this episode or hear others, visit BuildingPerformancePodcast.com