DucT Leakage Test And Sealing Guide

Kelly Kaminski

Coolman Communities

"Energy Diagnostics keeps us on our toes and ahead of the game! We began working with Energy Diagnostics in 2000, as they certified our new construction homes to the Energy-Star® program. In late 2008, it was a smooth transition to the NAHB Guidelines and then to the National Green Building Standard. Everything is handled with professionalism and integrity; from pre-scoring to scheduling to inspections and follow-through with NAHB. Ample notice is given when changes are happening to codes or standards. These guys are passionate about what they do, and they do it well."

Brad Wallace

Granite Ridge Builders

"Energy Diagnostics is the foremost authority on energy efficiency. They keep us in tune with the latest rebates and tax credits, and have shown use how to make a great house even better"

Justin Purdy

Vice President
Construction Lancia Homes

"Energy Diagnostics does a great job doing energy ratings on all of 180+ homes we build every year. Their knowledgeable staff guides our company in the right direction to make our homes more energy efficient and make our homes comfortable for our customers to live in for many years to come."

Requirement per program


Energy Star V3.0/3.1

2015 MRC

2015 Illinois


4 cfm/ft2

4 cfm/ft2 or

Total Only


8 cfm/ft2

(homes with less than 3 returns)

12 cfm/ft2

(homes with more than 3 returns)

4 cfm/ft2

4 cfm/ft2


How to get there

Duct Sealing - How to Guide
Duct Sealing - How to Guide

Factory Seems, Connections, Penetrations, and Framing Members all need to be sealed

Duct Sealing - How to Guide
Duct Sealing - How to Guide
Duct Sealing - How to Guide

The Cabinet, Coil, Trunk, Plenum, and Filter Slot all need to be sealed

Duct Sealing - How to Guide
Duct Sealing - How to Guide

Contact Energy Diagnostics for Duct Leakage Test Issues!

Serving customers in Valparaiso, Chicago, and beyond, Energy Diagnostics Inc. will happily give you an estimate for a duck leakage test. If you have any questions—or if you'd like to schedule a consultation—please contact us online.

Energy Star Partner
Residential Energy Services Network Partner
NGBS Green Home Innovation Research Labs
Energy Pro Exchamge
International Code Counsil
US Green Building Counsil