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Duct and Envelope Tightness Verification

Duct insulation and envelope tightness testing, also known as DET Testing, is required in the state of Georgia. According to state building codes, all duct insulation systems outside of conditioned spaces, as well as the building envelope, must be verified for proper sealing by a pressure test.

Call Arbor Insulation Solutions at (404) 728-0001 today for a free estimate for testing for your duct insulation system.

Duct Work Atlanta GA

Blower Door Testing

Blower door testing for new construction is accomplished by mounting a blower door in one of the doorways of new residential construction. This test is normally accomplished several days before Final Inspection. The blower door measures the amount of air moving through leaks while the house is slightly depressurized. The more air, the more leaks in the insulation. See below for leakage specifications. The IEEC code calls this a Building Envelope Tightness Test.

Duct Insulation Leakage Testing

Duct leakage testing is accomplished using a duct blaster (blower). Duct leakage testing is usually performed as soon the HVAC system is installed (typically prior to framing inspection). The prerequisite for testing your duct leakage is simply that the ducts, plenum, and air handler are air tight. This usually happens as soon as the HVAC installers complete their rough-in. A smaller blower similar to the blower door is attached to a return duct and the remainder of supply and return openings are sealed to be air tight. The duct blower pressurizes the ducts and measures the amount of air leaking out of the duct and insulation system. See below for duct leakage specifications. The IECC code calls this a Duct Tightness Test.

Call (770) 815-2115 for DET Testing.

The Details

The following is from the GA amendments to the 2009 IECC and addresses testing of the house envelope for tightness:

402.4.2.1 Testing required. Building envelope tightness and insulation installation shall be considered acceptable when tested air leakage is less than seven air changes per hour (ACH50) when tested with a blower door at a pressure of 50 Pascals (1.04 psf). The formula for calculating ACH50 and testing protocol is listed in Appendix B ‘Building Envelope and Duct Tightness Testing Protocol’. Testing shall occur after rough in and after installation of penetrations of the building envelope, including penetrations for utilities, plumbing, electrical, ventilation and combustion appliances.

The following is from the Georgia amendments to the 2009 IECC and addresses testing of HVAC ducts and insulation for tightness:

  1. Post-construction test: Leakage to outdoors for each system shall be less than or equal to 8 cfm (226.5 L/min) per 100 ft2 (9.29 m2) of conditioned floor area assigned to that system or a total leakage for each system with the air handler installed of less than or equal to 12 cfm (339.8 L/min) per 100 ft2 (9.29 m2) of conditioned floor area assigned to that system when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the entire system, including the manufacturer’s air handler enclosure. Conditioned floor area should be calculated using ANSI Z765, and should include all directly conditioned square footage, whether finished or not, that meets building code requirements for living space.
  2. Rough-in test: Total leakage for each system with the air handler installed shall be less than or equal to 6 cfm (169.9 L/min) per 100 ft2 (9.29 m2) of conditioned floor area assigned to that system when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the roughed in system. All register boots shall be taped or otherwise sealed during testing.

Improve your home’s comfort and start saving energy today.

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Testimonials

Gabriel G in Alpharetta. 8/7/15

Taylor was great.

Virginia in McDonough. 7/29/15

Great job. Friendly, informative service techs.

Linda S in Stone Mountain. 7/6/15

They were punctual & performed work as requested. Happy w/results.

Carol D in Snellville. 7/27/15

Arbor Insulation was on time. They explained each step. Were very polite & did an excellent job.

Jane E. 11/22/16

Very professional and friendly — showed up on time, did excellent work. Very likely to recommend this firm to others.

Jane E.

Insulation Install in Brookhaven

Great, very happy.

Stan S.

Davis R in Decatur. 7/14/15

Very well. Inspection and quote was thorough. Provided service in same week.

Really great working with Arbor Insulation!

I highly recommend them for any insulation needs. Matt came out to provide an estimate to improve the drafts in my townhouse. He is really knowledgeable, patient, and took the time to explain his findings and his recommendations. He was able to suggest and prioritize the recommended work for my house and the best ROI

Lynn S.

Natasha S in Suwanee. 5/29/15

On time and professional. Very nice.

Kathy C in Pendergrass. 6/26/2015

Outstanding. Timely, polite, neat. Conscientious, patient.

Stephanie M. 11/17/16

I am in AWE of the great service I received, this company changed my life I make it a habit now to be extra kind to someone everyday. My home is 25yrs old and needed insulation.they did a awesome job and I’m very grateful. I don’t have to walk around in a mink coat in

Stephanie M.

Shirley J in Atlanta. 7/20/15

Matt and Zip were on time. Explained what they were doing and why. The job was done in a timely manner. I am pleased.

Great Crew! Wonderful!

Insulated attic wall where it joined master bath. Installed blow in insulation in garage ceiling. Lots of hard work, job was bigger than we an expected great crew! Wonderful!  I probably asked too many questions!

Rebecca C.

Lyster Bass 12/1/16

Everything you all did was on time and carefully installed. We have seen a 40% decrease in our gas and electric bills.

Lyster B.

Stuart P. 12/12/16

I felt that the whole team did a very good job in a difficult attic. The team took the necessary time to clean out all the old insulation, and then a good job of foaming the decking.

Stuart P.

Mark E in Alpharetta. 7/30/15

Arrived on time. Very professional. Educated me on the process. Did a great job and surprised me with a rebate I was unaware of from Georgia Power.

Aaron B. 12/6/16

It was a giant help on heating and cooling my home!

Aaron B.

Bakari M. 12/10/16

Great Company, Prompt, Professional Employees. I would recommend Arbor Insulation Solutions to anyone who needs insulation needs.

Bakari M.

Gayle H. 11/14/16

Your team did a great job insulating my attic. I also really appreciated that they processed my rebates through Georgia Power.

Gayle H.

Russ P in Kennesaw. 8/3/15

It looks awesome.

Kevin B in Cumming. 7/17/15

Would use the company again. Cleaned after they finished.

Darryl S in Duluth. 8/6/15

Excellent experience. Prompt, professional & job well done.

Chelsea E in Atlanta. 07/28/15

They were great. I will be happy and cool for the rest on the summer.

Team was courteous and professional!

Team was courteous and professional!  The work was completed efficiently and to my satisfaction. They explained the process before getting started and showed me the completed work once finished. Scope of work:  Sealed leaks in the attic and added blown in insulation

Cindy K.

Royce W in Marietta. 8/5/15

Did great job. On time. Got job done quickly.

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Arbor Insulation Solutions, LLC
2300 Holcomb Bridge Road
Roswell, GA 30076


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