Hvac Flex Duct Installation Guide

You ve heard about indoor air quality iaq.

Hvac flex duct installation guide. Installation of flexible ducts shall be listed and labeled to standard ul 181b. Sometimes the best route for a flexible duct run is up and over an obstruction. We have talked about ducts being a channel from your hvac system throughout your home. But without proper support ducts can develops sags or kinks that reduce airflow 4a 4b.

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. Flexible duct needs to be larger than pipes to allow the same amount of airflow. It collects dust and is almost impossible to clean. Whether you re building or remodeling our innovative antimicrobial flexible duct products will help you breathe easier.

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. Slip the flex duct s inner core over the plenum or collar and onto the mastic glue. Bob s not a fan of flexible heating ductwork. Properly take into account duct length bend.

There s no question that flexible duct is easier to install than metal ductwork but consider this. These are rigid ductwork and flex 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. Flexible duct can degrade over time.

Flex duct installation we install a lot of hvac systems on martha s vineyard ranging from mini splits to fully ducted. Flexible ducts and achieve the designed air delivery performance. Both types of ductwork have specific features pros cons and specifications. Design the flexible duct system per the requirements of acca manual d residential and manual q commercial.

Chapter 4 is where the meat of the manual is the installation details and that s the part i ll talk about here. Use a proven method of duct sizing one that has taken into consideration both friction and dynamic losses. Now there are two major types of air ducts that you can choose depending on what you want and need. 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.

Rigid and flex ductwork. We keep those flex runs short on the order of 5 to 15 feet.