FDS1 – FLEX DUCT SUPPORT
Never hang flex duct on a narrow strap or a wire - it necks the duct down at every hanger and you lose airflow you will never see from the ground. Use a wide saddle, keep supports about four to five feet apart, and pull the run reasonably taut rather than laying it in S-curves.
10226 Plano Rd, Suite 104, Dallas TX 75238
Questions? Call or text (214) 340-9421
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm
Flex duct sags over time, especially in long runs through attics and crawlspaces. When duct sags, it creates low spots that restrict airflow and reduce cooling/heating. This support clips onto the duct to hold its shape and keep air moving.
Specs: Fits 4″ to 16″ flex duct, 100% recycled polymer, lightweight, installs with zip ties or duct strap
Replaces: FDS181GRAY
Fits: Universal — works with any 4″ to 16″ flexible duct
In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.
Specs
- TypeFlex duct saddle / support
- UseSpreads the load so flex duct keeps its round shape
- SpacingRoughly 4 to 5 feet between supports
Cross-reference numbers
This part replaces the following OEM and aftermarket numbers:
- FDS181GRAY
- MASTERFLOWSUPPORT
- THERMOPANTHERMO-SADDLE
Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.
What does a duct saddle do?
It supports flex duct across a span without pinching it. The wide curved surface spreads the load so the duct keeps its round shape and its full inside diameter.
Why not just use a strap or a wire?
A narrow strap or a wire cuts into flex duct and necks it down. A duct that is choked at every hanger has a fraction of the airflow it should, and you cannot see it from the ground. Codes call for a minimum hanger width for exactly this reason.
How far apart should the supports go?
Close enough that the duct does not sag more than about half an inch per foot of span between them. Four to five feet is typical for flex.
Does sag matter that much?
Yes. Every dip in a flex run is a pressure loss, and a run laid in loose S-curves across an attic can lose a startling share of the air it should deliver. Pull it reasonably taut and support it properly.
Do you stock these?
On the shelf at 10226 Plano Rd, Suite 104 in Dallas.
