Customer Testimonies

"Thank you Perkins Inc. for what your company offers
a superb, hi-quality service that saves DFW homeowners money, energy and reduces our impact on the environment as well! Perkins Inc. used hi-tech equipment to rate my home for energy loss and air infiltration problems. They repaired every issue they could find until my house had an acceptable rating." More >>

Will Raymond
Carrollton Tx.

The service provided by Perkins Inc. far exceeded my expectations. They were professional, informative and highly skilled. They gave me excellent advice and rescued me from making an uninformed decision. I'm so thankful I called them rather than an insulation company who would have come in to simply spray insulation. I saved so much more money than I would have if I had not contacted Perkins. I will call them again when I need more services. Thanks guys! More >>

Connie Freeman
Dallas Tx.

Perkins Inc. has made drastic improvements to my household, saving me money and making my home much more eco-friendly. The attic insulation job they preformed on my home combined with the home weatherization and duct sealing made my home much warmer in the winter and much cooler in the summer. Their services are top notch and any home owner/renter should take advantage of what Perkins Inc. can do for your home! More >>

Chris Graves
Carrollton Tx.

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The technology we use to preform an energy audit

Air infiltration Testing - Blower Door

A blower door is a diagnostic tool designed to measure the air tightness of buildings. and to help locate air leakage sites. A blower door consists of a calibrated fan for measuring an airflow rate, and a pressure-sensing device to measure the air pressure created by the fan flow. The combination of pressure and fan-flow measurements are used to determine the building air tightness and locate air leaks. The air tightness of a building is useful knowledge when trying to increase energy conservation or decrease indoor air pollution, or control building pressures.

A basic blower door system includes three components: a calibrated fan, a door-panel system, and a device to measure fan flow and building pressure. The blower door fan is temporarily sealed into an exterior doorway using the door-panel system. The fan is used to blow air into or out of the building, which creates a small pressure difference between inside and outside. This pressure difference forces air through all holes and penetrations in the building enclosure. The tighter the building (e.g. fewer holes), the less air is needed from the blower door fan to create a change in building pressure.

Duct Integrity Testing - Duct Blaster

A duct blaster is a device used to measure leakage in a duct system. It consists of a calibrated fan and a length of flexible duct for connecting the fan to a return register in the duct system to be tested. For a typical duct pressurization test, the remaining registers in the system (both supply and return) are temporarily blocked by means of masking tape and paper or a special adhesive backed film. The duct blaster fan then blows air into the system, and pressure gauges connected to the fan and the duct system are used to determine the volume of air per minute required to maintain a specified pressure in the ducts.

The duct blaster is similar in operation to a blower door, but the fan is smaller and allows more accurate air flow measurement. When a duct system is located wholly or partially in unconditioned space, a useful measure of energy efficiency is leakage to the outside, or the amount of air leaking from the ducts into unconditioned space. For this measurement, the blower door is used to equalize the house's inside pressure to that of the ducts.