Aspen Homes of Colorado
Aspen Homes is a small production builder that constructs homes that will
perform up to 40 percent better than a typical home built to code, yet are
affordable to the average homebuyer. 100% of Aspen homes exceed the requirements
of ENERGY STAR and Built Green Colorado. Each home also includes a 2-year
heating consumption guarantee for the homeowner.i
The energy efficiency features of Aspen Homes include the following:ii
- Enhanced wall, ceiling and slab insulation.
- External wall system features include blown-in insulation (R-15 blown-in
fiberglass and one-inch extruded polystyrene foam. Ceilings use cellulose
insulation (R-42). The exterior basement walls and the perimeter of at-grade
slabs are insulated with R-10 (2" thick) extruded polystyrene rigid board.
The basement wall and slab insulation helps keep the floor slab warm and
minimize heat loss to the ground.
- Highly-efficient HVAC and ducts, including a sealed-combustion,
properly-sized furnace, and ducts that are properly sealed, pressure
balanced and tested (less than 10% leakage rate). Ducts are placed entirely
inside the conditioned space. The furnace is centrally located in the
basement to minimize duct runs.
- Extensive home sealing (e.g., foam sealing voids in the rim joist, foam
sealing mechanical penetrations, caulking around window and door frames,
weather stripping around the attic hatch and exterior doors, caulking top
and bottom plates, and gluing the drywall to the top and bottom plate with
subfloor adhesive, and exterior wall insulation around showers and baths).
- Installation of the ENERGY STAR "Indoor Air Package" to maintain indoor
air quality. The system includes a mechanical ventilation system to exchange
indoor and outside air.iii
- Gas tankless water heater.
- Diagnostic testing: HERS rating and duct diagnostic testing.
Since 2002, the company has built more than 500 ENERGY STAR homes. Aspen
Homes received the Built Green Colorado ‘Home of the Year' Award in 2006, the
2007 Energy Value Housing Award from the NAHB, and was named the 2006 ENERGY
STAR Partner of the Year. Aspen Homes has also received recognition for building
energy efficient affordable housing.iv
- Air sealing and insulation are highly cost-effective measures, but
should be implemented as components of a whole-systems approach.
- Highly-efficient affordable homes can be built cost-effectively in cold
- Homeowner involvement is critical to achieving high levels of home
energy performance. The company provides information about the energy
efficiency features and benefits to each homeowner at a pre-construction
meeting, and again during construction walk-throughs and post-closing walk-throughs.
Simpler, straightforward messages about tangible energy savings are more
effective than detailed information in conveying the benefits of energy
efficient homes to homebuyers.
- High performance homes can help improve sales, particularly during
For more information
Web site: www.aspenhomesco.com
i The guarantee specifies that annual heating costs
will not exceed a specified amount, provided that the homeowner operates and
maintains the heating system in a responsible manner. A copy of the heating
consumption guarantee is available at:
ii For a detailed description of building design
features, see the U.S. DOE / Building America report "Performance Evaluations of
Prototype House: 50%-60% Total Energy Savings Level", prepared by IBACOs.
iii Aspen Homes participated in the EPA Indoor Air
Quality Pilot program. The current Indoor Air Package specifications are
available online at:
iv See EVHA description at: