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Image Gallery

A home is tested at two points for enclosure air leakage
A ventilation controller with a manual override is located on a central air handler fan that is located in an accessible location
Air seal whole-house fans to minimize air leakage.
All of the exhaust fans are wired to one labeled switch at the electrical panel
An HRV or ERV provides balanced ventilation
Central-fan-integrated supply ventilation with exhaust fans for intermittently balanced whole-house ventilation
Exhaust fan installed but in wrong direction causing excessive bend and duct is uninsulated
Formula 4.2 from ASHRAE 62.2-2010 for fan flow rate required to achieve an effective ventilation rate
Heat Recovery Ventilator (HRV) or Energy (Enthalpy) Recovery Ventilator (ERV)
In line exhaust ventilation installed
Individual metering or submetering of each unit allows residents to understand and better manage their water use.
Install the whole house fan in the ceiling in a central location in the house
Insulated whole-house fan cover
Properly installed ERV/HRV
Properly installed ERV/HRV
Rater-measured ventilation rate is within 100-120% of HVAC contractor design value (2.11)
Shed roofs provide more space for PV panels in this multifamily project near Denver,  Colorado.
Supply-only ventilation with a fresh air intake ducted to the return side of a horizontal air handler unit located in the attic
Supply-only ventilation with a fresh air intake ducted to the return side of a vertical air handler unit located in the house
Target Ventilation, Formula 4.1a from ASHRAE 62.2-2010
Test the thermostat fan, cool, and heat settings
The asymmetrical design of this home offers a large uninterrupted south-facing roof plane for solar photovoltaic and solar thermal panels.
The pier foundation that lifts this home above flood waters is visible in this photo taken before the skirt walls were added.
The varied roof pitches offer multiple options for solar panel placement regardless of home orientation for these production homes in Colorado.
The ventilation control is clearly labeled by the installer
The ventilation controller is next to the thermostat and has a manual override button
This bath exhaust fan ventilation control can be set by the HVAC technician for continuous operation, delayed shut off, or a set amount of minutes each hour
This builder in central Washington state chose durable low-maintenance exterior finishes like concrete, metal roofing, and metal siding and stone and gravel flooring.
This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home
Ventilation tied into the return with a mechanical damper
Ventilation tied into the return without a mechanical damper
Whole house fan cover details
Whole house fan with a built-in insulated cover
Whole house fans draw cool night-time air in through open windows and expel hot house air into the vented attic
With exhaust-only ventilation, the building is under negative pressure
With supply-only ventilation, the building is under positive pressure
Wrong – Whole house fan installed with holes in surrounding platform that need to be air sealed
Wrong – Whole house fan installed without an insulated cover