Project Team


Ratings, Awards and Recognition


DOE Challenge Home

Other Awards:

2014 Project of the Year - Honorable Mention
National Association of Home Builders (NAHB)

2014 Gold Award - Green Built Category
National Association of Home Builders (NAHB)

2014 Gold Nugget - Silver Award

2014 Platinum Award - Green Home Design
Professional Builder

2013 Green Home of the Year
Denver MAME Awards

HERS Index::

The goal of the Midtown Passive House project was to design to the Passive House standard and achieve certification from PHIUS (Passive House Institute US) for the production home builder Brookfield Homes. Brookfield Homes' objective was to offer this passive house as an energy efficient upgrade option to their existing base plans offered at the Midtown development. The fundamental design principles of the Passive House standard include continuous insulation, thermal bridge free construction, air tightness, and thermal comfort through balanced ventilation, heat recovery, and a minimal space conditioning system. As the Certified Passive House Consultant, Nathan St.Germain worked with Brookfield Homes to achieve the first Certified Passive House in the state of Colorado. It is also the first Certified Passive House built by a production home builder in the United States. The Midtown Passive House has won Green Home of the Year at the 2013 Denver MAME Awards. It also received the 2014 National Association of Home Builders (NAHB) Gold Award in the Green Built Home Category and an Honorable Mention as Project of the Year for single family production homes. 

Quick Facts


Location Denver, Colorado
Building Type single family residential
Project Type Zero Energy Ready / Near Zero Energy
Basis of Performance Claim Zero Energy Program

Energy Summary

Energy Data Type Zero Energy Program
Renewable Energy System Type(s) Photovoltaics

DOE Challenge Home

HERS Index 27

Envelope and Mechanicals

Subslab assembly

4" XPS 4" gravel 10 mil. vapor retarder

Foundation wall assembly

From exterior to interior - 1.5" XPS 8" concrete 2" XPS 7.5" blown in cellulose 2 x 4 wood stud with 5/8 drywall

Above grade wall assembly

From exterior to interior - 1" XPS 1/2" OSB 2.5" Spray Foam 2 x 6 staggered stud @ 24" O.C. 8.5" cellulose 2 x 4 staggered stud at 24" O.C. 5/8" drywall

Door Assembly

Therma Tru Insulated Frame

Air Changes per hour, ACH50 0.60 ACH50