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LaHouse is a display of high-performance building practices to create more sustainable, resilient and healthy homes in the gulf region. The research-based facility is located on LSU's Baton Rouge campus and displays home-building techniques and solutions for Louisiana's unique climate. LaHouse is open weekdays from 10 am to 4:30 p.m. for self-guided tours or can be toured completely virtually.
Experience the Lahouse via virtual tour
In most homes, ducts are installed in unconditioned attics. Ductwork within a conditioned space is significantly more efficient as the temperature difference between the air inside and outside of the ductwork is reduced.
The main benefits of having ducts in condition space is that the HVAC equipment is protected from the extreme temperatures of unconditioned attics and crawlspaces which can make it more difficult to make the room comfortable.
Additionally, interior installation supersedes the need to puncture through the building envelope. Any leaks through the duct or cabinet will go into the conditioned space rather than being lost to unconditioned space.
Web ceiling joists offer space between webs that can hold ductwork, wiring, and plumbing. This space eliminates the need for drilling or notching, allowing for a quick installation as no onsite alterations are required. Standard joists require load bearing walls or beams to support them, but open web joists do not.
Mastic is an alternative to the typical tape used to seal ducts. Foil tape is more common, but it is also more prone to leaks which can create uneven heating and cooling throughout the home. Using mastic instead of foil tape is a more permanent solution to seal ducts without the risk of leaks.
Efficient building envelopes can make the home more energy efficient
Mastic can efficiently seal off ducts
