Tag Archives: ductwork replacement

5 Energy Saving Rules of Ductwork Design

Keith Air ConditioningThe New Buzz in Energy Efficient Homes

Are you considering a home renovation or even building an addition? One of the keys to your whole home energy use is your HVAC ductwork design. It is essential to make sure your ducts are installed in the walls, ceilings and floors correctly. Here are 5 basic principles of home ductwork design to keep in mind when installing new ducts.

Identifying a Quality Design

  1. Sizing – What kind of heating or cooling load is required to make your house comfortable, and what size ducts will you need to accommodate it? This varies from house to house, depending on square footage, how much sunlight it gets, and a variety of other factors. The wrong size ducts will put extra strain on the HVAC system, wasting energy. Your contractor will use Manual J, the HVAC load calculation manual, to find the ideal size ductwork for your home.
  2. Building – Ducts should be made of strong, lasting materials, such as metal or fiberglass. Additionally, all ductwork should be properly insulated to maintain the temperature of the air as it passes through the ducts.
  3. Adjusting – Each room’s duct branch should have a damper to adjust the flow of air for that particular room and make sure it gets the amount it needs. Once that level has been found, the damper should be permanently secured in that position to prevent gradual air loss or gain over time.
  4. Balancing – To keep airflow balanced, home ductwork design should have a return duct in every room, in addition to a supply duct, but this isn’t always practical. A single, central return duct may be installed instead, with additional ducts and vents added to ensure air is able to reach the duct effectively.
  5. Testing – Once the ductwork is installed, it needs to be tested to make sure it’s functioning properly. Your HVAC technician should conduct a blower door test, to make sure your ducts were installed securely and that there are no leaks.

Learn more about home ductwork design from the home comfort pros at Keith Air Conditioning, Inc. or contact us today at 251-476-3610.

Spring Cleaning Includes Professional Air Duct Cleaning

Keith Air ConditioningPoor indoor air quality (IAQ) is a growing national problem caused primarily by negative pressure leaks and tight building envelopes. Without proper ventilation, a variety of harmful pollutants accumulate inside the ductwork attached to your HVAC equipment. If not adequately addressed, these contaminants continually recirculate through the system and can aggravate respiratory conditions such as asthma, allergies and COPD.

Our Air Duct Cleaning Services

A professional duct cleaning service will eliminate the dirt, dust, grime, pollen and mold that build up on the interior surface of your duct network over time. The duct cleaning process also removes contaminants from critical internal equipment components including:

  • The plenum
  • Heat exchanger
  • Condensate drain lines and pan
  • The interior of the air handler
  • Supply and return registers
  • Blower, housings and motors
  • The evaporator coil
  • VAV boxes

For every air duct cleaning remediation project, we send trained technicians equipped with cameras and mirrors to accurately assess the condition of your ductwork and HVAC equipment. If the system requires cleaning, the registers are sealed with a pressure sensitive tape, and access holes are cut into the supply and return duct lines.

When the ductwork is prepped, a powerful vacuum that meets NADCA standards is attached to the installed collar. Flexible forced air whips and mechanical brushes are used to agitate and dislodge any material that is stuck to the duct wall. The system is turned on, and the ductwork is placed into a substantial negative pressure. Dander, hair, debris and other impurities are pulled out of the ductwork and deposited into a sealed container.

The Benefits of Clean Ductwork

Periodic duct cleaning provides an excellent return on investment. Some of the more important benefits include:

  • Improved indoor air quality
  • Lower HVAC maintenance costs
  • reduced utility bills
  • Fewer furnace and AC repairs
  • Extended equipment life


Complete IAQ Services

To learn more about duct cleaning, HVAC maintenance agreements and our complete indoor air quality services, call Keith Air Conditioning, Inc. at 251-476-3610. We can schedule a free performance evaluation for your ductwork and HVAC equipment.