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I use a hacksaw brace that allows the blade to fit in without attaching both ends like a conventional hacksaw brace. The open handled brace is available in most hardware stores.
Put the blade in the brace with the teeth pointing down to the handle and your hand. This seems backwards but you'll cut on the pulling stroke.
Attach some form of guide to the line that you want to cut. For example, drill a couple of holes in a metal ruler and attach the ruler to the line on the duct you want to cut. Attach the ruler using #8 sheet metal screws 5/8" long to the duct work. The purpose is to keep your line(s) straight and prevent the duct work from moving back and forth with the saw blade's action.
Drill a 1/2" hole or larger in the duct along the ruler's edge. This is necessary to insert the hacksaw into the hole to start your cut.
Here is an essential tip: Use a hacksaw blade with 24 teeth per inch. Don't use a more coarse blade like 18 or 22. Don't use a 32 teeth per inch unless it's a short cut or you don't mind sawing all afternoon.
Here's an crucial point: Cut your line by dragging the blade downward toward you; don't push the blade back up like sawing wood, just pull the blade down and out and then reinsert the blade for your next cut. If you do this, the blade won't jam and bend out of shape besides cutting the duct more easily and quickly.
Finally, be SURE TO WEAR safety glasses because the steel dust from cutting the duct will find its way into your eyes and cause a bunch of grief.
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∙ 11y ago
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Can a humidifier be used with a main trunk line made out of duct board?
No, you should not use a humidifier in a main trunk line that is made out of duct board. This will cause the duct board to rot from the moist.
How do I add register to hot air furnace duct in my basement?
Buy the register, trace out the the hole for the part of it that will penetrate the duct, cut the hole and install the register then screw it in.
How do you know whether a furnace damper is open or closed?
There should be a lever somewhere on the duct near the furnace. If it is open, the lever will be parallel to the duct. If the damper is closed, it will be perpendicular to the duct.
Why does furnace duct pop when heat goes on and off?
The heat it making the duct expand
How often should furnace duct cleaning be done and how much does it cost?
I heard that you should have ducts cleaned but I don't know how often. How often should furnace duct cleaning be done and how much does it cost?
Two ends of a furnace duct have come apart and I can't get them back together How do I fix this?
Don't laugh, duct tape.
How do you repair a furnace duct?
Contary to popular belief, 'duct' tape is not for fixing broken furnace ducts. It was originally developed for sealing the joints between duct sections, and is a poor substitute for properly riviting the sections together. If you have a large leak in a duct section, you might consider replacing the whole section rather than trying to patch it. If the leak is only a few inches in diameter, cut a piece of sheet metal about the same thickness as the metal of the duct, drill holes 1/8 inch in diameter around the perimeter of this piece, and then lay it on the duct. Using a marker of some sort, mark a few of the holes at one end of the patch, and drill the duct with the same 1/8 inch drill. Using a pop riveting tool, pop rivet the patch to the duct. Work from one end of the patch toward the other, never drilling more than 2 or 3 holes at a time before riveting them. Otherwise, the patch will end up not aligning with the holes that you have drilled, and you will have to make more holes in the duct. If the patch must go over an irregular surface, like an elbow, you may need to use silicone sealant to seal the spaces between the rivets.Be careful when drilling the duct that you do not press hard on the drill, as it could cause the duct to collapse. If you do not have any of the tools needed to perform this repair, consider calling a heating and air conditioning specialist.AnswerIt depends on what is wrong with the duct. Could you be more specific?
Why is duct tape called that?
Duct tape was invented to tape around joints in an air duct on a furnace. The ducts are square or round tubes that carry warmed air from the furnace to the floor registers in each room. If the joints are not taped, valuable warm air will leak out of the joints.
How much does a furnace cost for a 1800 square foot house?
Cost may vary depends on the house size, accessibility, the amount of work involved in duct reworking, disconnecting/connecting gas electricity. Normally, it's better to replace AC/coil/Furnace all together, since a new furnace may not be compatible with old indoor blower /evaporator coil. The real cost of installing a furnace vary lots of depending on the low end or high end product, accessories (media filter , humidifier) you like to have.
Where is the filter located on a lennox g8r-110-m-1 furnace?
Try looking where the return air duct connects to the furnace, if not there the next place to look is in the return air grille in the living space. Either way it is somewhere in the return air duct between the grille and the furnace.
Is there any special equipment or precautions which are necessary before cleaning a furnace duct?
I would like to do some furnace duct cleaning but I am nervous. Do I need a special vacuum to do this? Will I get soot all over my carpet if I mess up?
When should air ducts in a home be replaced?
they should be replaced when they either have holes in them or are comming apart. also if you upgrade your furnace you may need big duct work. also they should be cleaned every couple years
