High Performance SIP Ultimate Wind House Gretna LA

Location: Gretna, LA

Project Information

Project Type: Residential, < 3,000 sq. ft.
Manufacturer: Enercept
Design Professional: Enercept
Year Built: 2022


High Performance: Yes
HERS/EUI Index Score: 54
ACH50 - Blower Test Results: 3.51
kBtu/sq.ft./year: 23.6
CO2 lbs./sq.ft./year:

Awards/Certifications: DOE Zero Energy Ready Home, ENERGY STAR Certified, EPA Indoor AirPLUS

This High Performance family residence project was able to reduce the amount of time to frame the home. Panels were
installed in four days and it greatly reduced the amount of on-site waste.

The city of Gretna is located on the west side of Mississippi River, just east and across the river from New Orleans. Since the area is prone to flooding, the home was built on pilons 36" above the elevation. The structure was specifically engineered for wind loads: Ultimate Design Wind Speed=145 mph; Wind Lateral Load=43.7 psf; Wind Vertical Uplift=19.4 psf.

Wall thickness 5 5/8" EPS Core
Roof thickness 7 3/8" EPS Core

HVAC system:
Electric Air Source Heat Pump 8.5 HSPF; Electric Air Source Heat Pump 15 SEER.

U-values of windows:
U-Value: 0.33
SHGC: 0.23

Framed Floor: R-13

.82 Energy Factor
Natural Gas
Tankless water heater
100% interior LED lighting
Energy Efficient Samsung appliances


Affiliated Members

Enercept, Inc.

Watertown, SD


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