Black Spots Flexible Ducts Attic

Black dust around air vents.

Black spots flexible ducts attic.

Sometimes the best route for a flexible duct run is up and over an obstruction. Flexible hvac ductwork. I was wondering is there any figures on the expected energy temp lose. To prevent problems use saddles or straps to support at regular intervals 4c 4d follow the manufacturer s instructions but in case they get lost here is a list of best practices for.

Most of the time dirt accumulates on ceilings because air is leaking in from the attic between the drywall and the supply register. If the register is closed the air is forced along the ceiling and the next thing you know you ll start to see black buildup across your ceiling. Manufacturers then cover the tube in fiberglass insulation. I live in montreal and had a lennox air conditioner and ducts installed in the attic.

The rigid insulation was saturated from condensation. Both types of ductwork have specific features pros cons and specifications. You may have black mold in your air ducts if you notice any of the following signs. These are rigid ductwork and flex ductwork.

When hvac ducts are installed in a vented attic in a dry climate bury the ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space. What i ve observed attic temp 50c vent temp 21c attic temp 37c vent temp 18c attic temp 25c vent temp 13c not sure what the r value off flexible duct or main metal duct is. Duct cleaning can damage flex ducts. I found instead a vintage 3 ton ac unit with 1 rigid insulation taped all over it and insulated flex duct snaking all over the poorly insulated attic.

In order to understand why smart air doesn t recommend any sort of duct cleaning for flex ducts you need to know how flex ducts are designed and made. The flex ducts were literally filled shut with ice in the low spots compressing the scant insulation layer beneath them. When black mold grows on walls floors carpets and so on it s relatively easy to spot. However when black mold starts growing in your air vents things get a little trickier.

This type of ductwork is usually tube shaped and is made from a wire coil covered in a bendable but durable plastic. But without proper support ducts can develops sags or kinks that reduce airflow 4a 4b. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. If you are in need of our other air duct services contact our houston hvac experts at smart air by calling 281 809 6444 today.