If you're looking at a stack of HVAC supplies and realize you're lacking a 14 duct collar , you're probably neck-deep in the task that requires a few serious airflow. It's one of all those parts that appears small within the fantastic scheme of the whole heating and air conditioning system, but in the event that you don't possess it—or in case you get the wrong kind—nothing else is going to connect right. This specific size is a bit associated with a heavy batter in residential and light commercial function, often used regarding main trunk lines or large offer branches where a person need to proceed a lot associated with cubic feet associated with air per minute.
What will be a 14 duct collar anyway?
In the simplest terms, a 14 duct collar will be the bridge among your main air flow plenum (that big metal box connected to your furnace or AC unit) and the actual 14-inch round ductwork that carries atmosphere in order to rooms. Think that of it like a transition item. You cut the hole in the flat sheet metallic of the plenum, pop this collar in, and suddenly a person have a sturdy round connection point to slide your flexible or rigid ducting onto.
With no collar, you'd be trying to strapping a round tube to some flat surface, which, as anyone who's tried it knows, is a formula for a leaking, whistling mess. The collar gives a person a mechanical connection. It's usually made of galvanized steel, which is great because it won't rust out if things get the little humid, and it's stiff more than enough to hold the shape when you're wrestling with weighty insulated flex duct.
The various styles you'll operate into
Whenever you head to the hardware store or browse on the web, you'll notice that not every 14 duct collar looks the exact same. You will find two major types you'll probably encounter: the tabbed version and the spin-in version.
The tabbed collar (sometimes called a start collar) is probably the particular most common for DIYers or folks working with rectangular plenums. It has a lot of little metal "fingers" or tabs around the base. You reduce your 14-inch opening, shove the collar in, and then reach inside to bend those dividers over. It sandwiches the sheet steel of the plenum in between the tabs and a flange on the exterior. It's a solid connection, though this can be a bit of a literal pain if those metal sides catch your fingertips.
Then you've got the spin-in collar . These are usually favorites for pro HVAC installers mainly because they're fast. They have a threaded sort of edge that you actually "spin" into the hole. They usually offer a really restricted fit, but you require a very particular, clean hole regarding them to function right. If you're just doing a good one-off project in your own home, the tabbed version is usually the particular safer, more forgiving bet.
The reason why 14 inches is a "Big Deal"
In the wonderful world of ductwork, size matters even more than you might think. A 14 duct collar allows for a significant amount of air. For context, a standard bedroom might only need the 6-inch or 8-inch duct. A 14-inch duct is usually used to feed a whole section of a house or a very large open-concept living area.
If you're replacing a collar or adding a brand new run, don't be tempted to downsize just because the smaller collar is usually cheaper or easier to find. In case your system was made to get a 14-inch line, dropping it lower to a 12-inch line will choke the airflow. Your own blower motor will have to work harder, your power bills should go up, and you'll probably notice that the room at the finish of that range never gets very cool or comfortable enough. Stick along with the 14-inch in the event that that's what the plan requires.
Getting the set up right
Setting up a 14 duct collar isn't exactly rocket technology, but there is usually a definite "right way" to obtain if you want to avoid air leaks. First off, you will need a good pair of aviation snips. Don't attempt to use an utility knife or some cheap kitchen scissors; you're functioning with galvanized metal here.
Trace the inner size of the collar onto your plenum. Professional tip: use the particular collar itself simply because a template, but remember to cut the particular hole just a tiny bit bigger than the inner band so the tab can in fact fit by means of. Once you've obtained your hole, wear gloves. I can't stress this good enough. The edges associated with that hole and the tabs on the collar are usually basically razor cutting blades.
Once the collar will be seated and the tabs are bent straight down tight, you may think you're done. You aren't. Air leaks would be the foe. Actually a tiny space around the bottom of this 14 duct collar may waste an astonishing amount of power. You'll want in order to go around the base with some HVAC-rated foil tape or, better yet, some duct mastic (that gray, gooey stuff you brush on). Mastic is messy, but once it dries, it creates a permanent, airtight seal that record can't always fit, especially as the particular system heats up and cools straight down over the yrs.
Common mistakes to watch out for
I've seen plenty associated with "handyman" specials exactly where the 14 duct collar has been just shoved into a jagged hole and held in location with a prayer and some cheap silver precious metal tape (not the particular real foil stuff). Don't be that individual.
One big mistake is just not securing the ducting to the collar properly. If you're using flex duct, you will need a big pressure tie (like a giant zip tie) to cinch the inner liner to the collar. Then, you pull the insulation over and tape that lower too. If a person just tape the insulation and skip the zip tie up on the internal liner, the air flow pressure will ultimately blow the duct quickly the collar. It's a noisy, startling way to find out your HVAC system is definitely broken.
An additional thing to maintain an eye on is the "damper. " Some 14 duct collar units have a built-in damper—a small metal flap you can turn with the handle. This is great for managing your system. If one part associated with the house is getting way too much air, you are able to somewhat close the impediment on that 14-inch run. In case your collar has one, make sure the deal with is accessible after you've insulated everything. There's nothing worse compared to having to adjust the damper and recognizing it's buried under six inches of fiberglass.
Where to buy plus what to pay
You can find a 14 duct collar at most big-box hardware stores, although 14 inches will be sometimes a "pro" size which they might not keep a ton of in stock. HVAC supply houses will definitely have them. Price-wise, they aren't going to break the bank—usually approximately 15 and thirty dollars depending on the gauge of the steel and regardless of whether it has a damper or a stick-on gasket.
If you're buying online, just double-check the "collar elevation. " Most are around 2 in order to 4 inches tall. If you have got really thick padding on the plenum, you might want a taller collar so that you have plenty associated with room to secure your ducting upon without fighting the insulation.
Final thoughts on the task
Working with the 14 duct collar is one of those tasks that will feels very satisfying once it's carried out. There's something about this "clink" when the tabs lock straight into place and a person realize you've simply created a strong, professional-looking connection. Just remember: measure twice, slice once, use plenty of mastic, and for heaven's sake, wear your own gloves . Your own fingers will give thanks to you later, and your HVAC system can run an entire lot smoother knowing it's not leaking air into the attic room or crawlspace. It's a simple component, but it's the backbone of the good duct installation.