How to get the most from your flexible duct

How to get the most from your flexible duct

Flexible ducting is at the heart of your HVAC system, but it must be installed correctly. Most of the problems that people claim to encounter with this type of tubing stem from poor installation. Master that and your system will work like clockwork.

Common problems when installing ductwork

One of the most common problems with flexible duct is that installers don’t pull the inner lining tight. This simple step can significantly reduce the friction rate by reducing longitudinal compression. Leave the liner loose and you’ll experience a 15-30% rise in the friction rate.

You also need to make sure that the ductwork is adequately supported. Sagging ducts make it difficult to create really tight and solid connections between the liner and the connector. Always seal first with duct tape before securing with a plastic zip tie for best results.

Another issue is making the bends in the ducting too tight. Use another piece of high quality flexible ducting from a company like https://www.dustspares.co.uk/flexible-ducting/ as a guide when making your bends – they should fit snugly to a 90-degree angle but no tighter.

Tips for correct installation

Get it right and your ducting will be versatile, durable and long-lasting. It should be easy to install if you avoid the common installation problems and take your time.

Start by planning out where the piping has to go, remembering to add in regular support joints for an optimised installation. Keep the number of joins to a minimum and don’t situate any part of your ducting system too close to a heat source.

When installing, work from support joint to support joint, piece by piece, ensuring that joins make a really snug and tight fit. Don’t forget to pull out the inner sleeves to reduce friction throughout your system, so do this as you go.

To improve the airflow, ensure you have sufficient insulation which is vital to protect the ducts from extremes of temperature and constant heating and cooling of the airflow. Check for leaks and use a high-quality mastic around the joins if necessary. Also, check that there’s sufficient support and no overly tight bends that are inhibiting airflow.

Flexible ducting is cost-effective, easy to work with and ideal for tricky installations. Pay attention to the details when installing and you’ll find your HVAC system functions brilliantly.