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3398 Washington Road
Atlanta, GA 30344
USA
773.398.5288
corbett@buildingperformanceworkshop.com
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: dehumidification
This is mathy, but it’s not anything too difficult for anyone to understand I think. There are lots of nuances and caveats, which I think make the whole thing more interesting! Ideal absolute humidity range is ~35-65 grains per pound.
∆Gr/lb = Inside gr/lb - Outside gr/lb
Gr/hr = ∆Gr/lb x CFM x 4.5
Lb/hr = Gr/hr / 7000
Lb/day = Lb/hr x 24
Gal/day = Lb/day x 0.12
Pints/day = Gal/day x 8
I'm pretty sure the awesome folks who created Manual J (like Hank Rutkowski- hear my interview with him here), and the softwares we use to run the calculations (Elite RHVAC, used here, and Wrightsoft) do not have a lot of personal experience with the test dynamics of home enclosures, and may never have actually used a blower door before. Here's a demonstration of why it's so important to respect the blower door if you're doing HVAC design for residential construction or home improvement.
Learn to perform and analyze Blower Door and Duct Tightness Tests in my 1 Day Training at: https://buildingperformanceworkshop.com/det-verifier
There are two blower door brands, both available at: https://www.trutechtools.com/system-blower-doors-and-duct-testers.html
See a tour of a full Manual J report below:
Anybody who has followed this channel knows that ventilation is important in homes- but how much, what kind, and what's enforced or recommended? This guy knows- Joseph Hillenmeyer at Aprilaire is deeply involved in the communities of builders, contractors, testers, and consumers who are impacted by the pieces of ventilation equipment. Here's where we are right now.
Learn more about Aprilaire ventilation systems at: http://Aprilaire.com
To help support our work educating on the science of homes, please become a member: http://Patreon.com/HomeDiagnosisTV
Presented in partnership with our friends at Santa Fe and Ultra-Aire Dehumidifiers. Understand the underlying dynamics that make a home healthy or unhealthy by learning the basic physics, chemistry, and microbiology happening all around us inside homes.
Get the book at: https://buildingperformanceworkshop.com/homeperformancediagnosticsbook
Watch the TV series: https://HomeDiagnosis.tv
See what the hottest place on Earth (Death Valley, with the world record 134ºF temperature) does to the world's highest performance tiny house on wheels. See proof that our airtightness, insulation, cooling, and ventilation works even where it's not designed to go.
Grace and Corbett are building a performance-proven tiny house on wheels called the Tiny Lab! It's going to be built from November to February, and it starts a 16-city US Tour in March of 2016. The Crowd Sourcing Campaign is happening NOW on RocketHub- CLICK HERE TO PARTICIPATE IN THE TOUR! Here's the full series of four webinars from August 2015 detailing the engineering of a super cool tiny house on wheels!
In #1: SHAPE AND LAYOUT, Corbett and Grace show the 3D sketchup model of the Tiny Lab, and bring engineer John Bergman in for some heavy lifting to do with pinpointing the center of gravity on this 24 ft trailer tiny house.
In #2: AIRSEALING, INSULATION, & WEATHER BARRIERS, tour the process of energy modeling the tiny house to determine the optimal R-values and level of airtightness, and hear about vapor barriers, moisture control, and drainage.
In #3: HEATING, COOLING, AND VENTILATION, you get a taste for how wrong a lot of the discussion goes about homes in general, and tiny homes especially. The HVAC design, including Manual J heat load calculations and hourly solar gain curves are analyzed and used for things as straightforward as deciding which direction to park the tiny house.
In #4: BELLS & WHISTLES, see behind the design of the solar PV kit, formaldehyde-free plywood built-ins, composting toilet, off-grid plumbing challenges, and luxury items that just add that quality of life that tiny house occupants are seeking.
We really hope you'll tune in for the videos of construction- you can subscribe to our YouTube channel right now with one click!
Today Corbett is psyched to again talk with Lew Harriman, the master of dehumidification and author of lots of books on moisture control, about guess what! Lew takes us on a tour of macro-drying philosophy, down to the nitty gritty of ERVs and hairdryers and wet spots on your carpet. Sponsored by Corbett's Fall Fast Track 6-week mastermind course in free market home performance.
To download this episode or hear others, check the show out on iTunes or at BuildingPerformancePodcast.com
