Blower Door Testing - HERS Rating

Blower Door Testing

Blower doors are variable-speed fans equipped with a frame
and shroud that permit them to fit inside a variety of door frames.
The instrumentation includes pressure gauges that enable the
operator to determine the flow of air through the fan as well as
the pressure the fan induces on a dwelling. Since leakier houses
require more airflow to induce a given pressure difference,
blower doors can measure the relative leakiness of a house.

Blower doors can also reveal the location of many leaks, thus providing a clear target for
air sealing. When the job is partially or fully complete, blower doors also provide
technicians with quick feedback on the effectiveness of their work. In addition, blower
doors can help diagnose which parts of a house do not need to be sealed.

Blower door technology has contributed significantly to the evolution of weatherization
and building science. Before the advent of this technology and the detailed analysis of
patterns of convective energy losses that it allows, most air leakage was thought to
occur toward the mid-height of the conditioned building envelope, primarily through
doors and windows. Professionals advocated weatherstripping and caulking in those
areas. In fact, blower doors do reveal leaks from doors and windows, although their
effects are amplified, since small areas result in high-velocity air currents.

However, leakage from doors and windows represents a relatively small percentage of
convective losses in most dwellings, and serious leaks tend to occur at the bottom and
especially at the top of the conditioned envelope. As a result of the widespread use of
blower doors, professionals increasingly seal the air in attics and basements where
most air infiltration into the house takes place.

Blower Door Testing as well as thermal imaging technology is included in our
comprehensive energy audits. Call now, to set up an appointment (989)414-6699, or fill
out our questioner and we will contact you at your convenience.

Blower Door

Building Performance
by Design
"Your energy conservation experts"

Phone:
989-414-6699
866-783-4877

Location:
2051 S. Huron Rd.
Kawkawlin, MI 48631