AISI Services
AISI Certified Home Inspection Services
Tacoma, WA 98418
Phone: 253-376-3634
Tacoma, Olympia, Puyallup, Seattle, Kent, Auburn
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AHIT Certified Inspector

Pro-Labs Certified Inspector

FREA Member #0023606
Commercial and Residential
Real Estate Inspector

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Washington State
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More on Heating and Air Conditioning Systems

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Hidden Problems In Existing Ductwork

The network of hollow ductwork that carries the air to and from your furnace or air handler through ductwork to vents to distribute into the home.

A Department of Energy study recenty stated:

Typical duct systems lose 25 to 40 percent of the energy put out by the central furnace, heat pump or air conditioner.

That waste appears on your monthly utility bill, every month.

Until you decide to knuckle down and do something about it.

The study further pointed out that:

  • Residential ductwork systems are not engineered, installed or adjusted to properly distribute the air in the home

  • Duct systems have design errors and hidden restrictions that choke air flow through ductwork reducing overall efficiency

  • Over two thirds of residential systems have restricted airflow

Installed ductwork that crosses unconditioned spaces in crawlspaces, attics, basements or garages does not have enough insulation to keep air warm in the winter, and thus, cool air in the summer, again, serious loss of efficiency due to inadaquate ductwork engineering.

The biggest problem with existing ductwork is: they leak an incredible amount of air, throwing your money away.

Installed ductwork leaks also bring in moldy, dusty, potentially contaminated air from places like your crawlspaces, attics, basements or garages.

A Department of Energy lab discovered the reason for this leakage: gray duct tape quickly dries out and is virtually worthless for sealing ductwork. Ninety-nine percent of all installed duckwork uses standard duct tape.

The Department Of Energy states: “Duct repairs could be the most important energy improvement measure you can do.”

Correct Installation

Poor and or inexperienced workmanship creates duct leakage where your HVAC equipment is connected to your existing ductwork and throughout the ductwork network in a home.

A recent study by a major electrical utility found that 79% of newly installed systems had either significantly too much or too little refrigerant gas. This causes an ineffective system operation, which translates to higher energy costs.

Very few residential contractors have the training and know how to do it properly.

We precisely weigh in the proper charge, or adjust it based on careful temperature, relative humidity and refrigerant gas pressure measurements. For total comfort and real energy savings.



AISI solutions dramatically and cost-effectively reduce energy usage (253) 376-3634






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