Duct Insulation - Blog Posts by Tag

Best Practices of Ductwork Design

Best Practices of Ductwork DesignIf you are designing a new home or retrofitting areas in your current home, you certainly want and expect your contractors to use best practices of building science. The same is true for your ductwork system. Though, that wasn’t always the case when it came to construction. Read on to learn what you need to know about the tubes that carry the cooled and heated airflow that keep you comfortable.

Metal, Fiberglass, or Plastic?

Ducts are traditionally fabricated from thin sheet metal. In recent years and decades, flex ducts and plastic are often used. Many older homes use cavities inside walls, floors, and the ceiling as airways. Make sure all of your air ducts are installed using actual industry-approved materials.

Location and Insulation

The fewer turns and splits your conditioned air must travel through, the more efficient your ductwork system will be. This translates into lower energy bills and greater comfort. Ducts should take the shortest route possible from the air handler to the outlet. Conditioned areas, such as raised floors and chases, are preferable. Ducts located in unconditioned spaces should be insulated.

Sealing Materials

Cloth “duct” tape, as it’s called, should never be used to seal ductwork. It will peel and fall away very quickly. Your HVAC contractor should only use industry-approved sealing materials, such as metal tape, mastic sealant, clasps, and aerosol sealant.

Sizing Ductwork

If your contractor is sizing your duct system (or heating and cooling systems) based on the square footage of your home, find a different contractor. There are dozens of variables that affect heat gain/loss on all sides of your home. Your ducts should be sized using software based on Manual D principles outlined by the Air Conditioning Contractors of America.

Balancing and Testing

Once your ducts have been installed, sealed, and insulated, they should be tested for balance and tightness. Any leaks should be resolved and airflow to each outlet and through your home should be in balance.

For more information about ductwork best practices for your San Diego area home, please contact Sherlock Heating & Air Conditioning today!

Our goal is to help educate our customers in the greater San Diego and San Marcos, California area about energy and home comfort issues (specific to HVAC systems).

Credit/Copyright Attribution: “iQoncept/Shutterstock”

How to Install Heating Duct Insulation in Your Vista Home

How to Install Heating Duct Insulation in Your Vista HomeUninsulated HVAC heating ducts in attics, subfloors and basements regularly lose heat through the walls, consequently reducing the efficiency of your heating system. The best way to reverse this effect is to insulate all your ducts with non-conductive material.

Insulating your heating ducts restricts heat loss, increases your system’s energy efficiency and reduces overall operational costs. While some homeowners consult contractors for this task, you can handle it yourself. All you have to do to is:

  • Begin by carefully inspecting your entire HVAC system and ducts. Ensure they’re properly functioning before turning the heating unit off for about two hours to allow the ducts to cool.
  • Protect yourself with a duct mask, work gloves and safety glasses before accessing your ducts. Overhead and attic ducts should be safely accessed by a step ladder, while subfloor ones can be accessed through crawlspaces.
  • To comprehensively insulate all ducts, you need to obtain foil-face fiber glass insulation that’s sufficient enough to cover all surfaces. To do this, you need to first measure the surface area of all duct surfaces and ensure that the figures correspond to the insulation’s size.
  • Get some butyl, foil, or any other heat-approved tape, and wrap strips of it around all duct joints. An overcoat of duct sealer should then be applied with a paint-brush.
  • Place the foil-face insulation by taping it to individual ducts. To ease the process, use the tape to attach one end of the foil to the surface as you wrap it around the duct.
  • Overlap the two foil edges and pin or staple them together with 8D framing nails to ensure all duct surfaces are covered. Complete this procedure by taping over the seams with any heat approved tape.

For additional help with your HVAC system, contact Sherlock Heating and Air Conditioning in San Diego. Our experts are extensively experienced in installing, operating, maintaining and repairing HVAC systems.

Our goal is to help educate our customers in the greater San Diego and San Marcos, California area about energy and home comfort issues (specific to HVAC systems).

Credit/Copyright Attribution: “lineartestpilot/Shutterstock”