Hvac Flex Duct Installation Guide

Sometimes the best route for a flexible duct run is up and over an obstruction.

Hvac flex duct installation guide.

Why worry about mold mildew and allergens infiltrating your home through your hvac ducting. But without proper support ducts can develops sags or kinks that reduce airflow 4a 4b. Whether you re building or remodeling our innovative antimicrobial flexible duct products will help you breathe easier. Rigid and flex ductwork.

Installation of flexible ducts shall be listed and labeled to standard ul 181b. Flexible duct needs to be larger than pipes to allow the same amount of airflow. Flex duct installation we install a lot of hvac systems on martha s vineyard ranging from mini splits to fully ducted. Properly take into account duct length bend.

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. We have talked about ducts being a channel from your hvac system throughout your home. 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. You ve heard about indoor air quality iaq.

Both types of ductwork have specific features pros cons and specifications. Slip the flex duct s inner core over the plenum or collar and onto the mastic glue. Design the flexible duct system per the requirements of acca manual d residential and manual q commercial. Now there are two major types of air ducts that you can choose depending on what you want and need.

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. Use a proven method of duct sizing one that has taken into consideration both friction and dynamic losses. Chapter 4 is where the meat of the manual is the installation details and that s the part i ll talk about here. We keep those flex runs short on the order of 5 to 15 feet.

Flexible duct can degrade over time. Bob s not a fan of flexible heating ductwork. The 25 page guide begins with a description of the classifications and characteristics of flex duct then discusses how they re tested listed reported and certified. On the ducted projects we use flex for the branch runs to the supply boxes.

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. Flexible ducts and achieve the designed air delivery performance.