Hvac Flex Duct Installation Guide

But without proper support ducts can develops sags or kinks that reduce airflow 4a 4b.

Hvac flex duct installation guide. Both types of ductwork have specific features pros cons and specifications. You ve heard about indoor air quality iaq. Installation of flexible ducts shall be listed and labeled to standard ul 181b. Properly take into account duct length bend.

Sometimes the best route for a flexible duct run is up and over an obstruction. Whether you re building or remodeling our innovative antimicrobial flexible duct products will help you breathe easier. Why worry about mold mildew and allergens infiltrating your home through your hvac ducting. On the ducted projects we use flex for the branch runs to the supply boxes.

Design the flexible duct system per the requirements of acca manual d residential and manual q commercial. Flexible duct needs to be larger than pipes to allow the same amount of airflow. It collects dust and is almost impossible to clean. Flexible duct can degrade over time.

Now there are two major types of air ducts that you can choose depending on what you want and need. 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. Push the core so that it covers at least 1 or 2 inches of the plenum or collar and wrap two rounds of duct tape. Bob s not a fan of flexible heating ductwork.

We have talked about ducts being a channel from your hvac system throughout your home. Guidelines for installing flexible duct i n s t a l l a t i o n i n s t r u c t i o n s n o n m e t a l l i c a i r d u c t s a i r c o n n e c t o r s w i t h p l a i n e n d s u l 1 8 1 l i s t e d u n d e r f i l e m h 9 5 9 6 9 8 4 4 a p p l i c a t i. We keep those flex runs short on the order of 5 to 15 feet. These are rigid ductwork and flex ductwork.

Chapter 4 is where the meat of the manual is the installation details and that s the part i ll talk about here. Flex duct installation we install a lot of hvac systems on martha s vineyard ranging from mini splits to fully ducted. Rigid and flex ductwork. Slip the flex duct s inner core over the plenum or collar and onto the mastic glue.

Insulated flexible duct flexibility is an advantage when installing in obstructed areas light density fibrous glass insulation fibrous glass insulated hvac duct systems 5 fibrous glass insulated flexible ducts flexible ducts insulated with fibrous glass are an efficient economical way to install connections between trunk. Use a proven method of duct sizing one that has taken into consideration both friction and dynamic losses.