How to Clean Your Air Ducts (The Mexican Way)

The first cold night of the year the furnace kicks on for the first time since March, and everybody in this country knows that smell. People say it is dust burning off the furnace. Some of it is. The rest is not burning, mi amigo, it is just moving, lifted up off the inside of every duct in your house and pushed out of every register into the room where your children sleep. A week later somebody is sneezing every morning and there is no cold going around, and your wife has already said "we need to get the ducts cleaned." Today, two things. How to do most of that job yourself in an afternoon with a shop vacuum and a twenty dollar brush. And the honest truth about the ninety-nine dollar coupon in your mailbox, and exactly how it becomes twenty-four hundred dollars before the man backs out of your driveway. THE COUPON IS A DOOR, NOT A CLEANING. A small vacuum in a few registers for twenty minutes, then a photo on his phone. The photo is always black and fuzzy, and the word is always mold. Then it is a sanitizing treatment, a fogging, an antimicrobial spray, a dryer vent cleaning while he is here, and a sixty dollar filter. Eighteen hundred. Twenty-four hundred. And your ducts are about as clean as they were at breakfast. WHAT THE GOVERNMENT SAYS. The environmental agency's position, in plain words: no evidence duct cleaning prevents health problems, and most of the dust in ducts just sits there. Clean them if you can SEE mold, if mice or rats have lived in them, or if dust is actually blowing out of the registers. That is the whole list. Not every fall. Not because a coupon said so. THE AFTERNOON, IN ORDER: 1. Furnace OFF at the switch on the furnace itself, the one that looks like a light switch. Not the thermostat. 2. Leave the OLD filter in. You are about to stir up dust and it belongs on a filter headed for the trash, not a new one and not your coil. New filter goes in LAST. 3. Every register cover off. Painted-over ones need a utility knife around the edge. Bag every duct you are not working on so dust does not travel room to room. 4. Wash the grilles. Hot water, dish soap, stiff brush. Never bare hands, the louvers are sharp and the sludge on a return grille is the worst thing in this video. 5. Shop vacuum as far down each run as the hose reaches, then the dryer vent brush on flexible rods in a drill, slow, dragged back. It comes out gray. Vacuum again. 6. Bonus round: with every other vent bagged and the shop vac at the furnace end, a leaf blower at the farthest register pushes deep dust down the line. Loud, needs two people, works better on some houses than others. 7. THE RETURN. The big hallway grille is the dirtiest thing in your house you have never looked at. Vacuum the mat out, brush it, then follow it down to the furnace and vacuum the blower compartment floor. Gentle, there are wires and a fan. 8. NOW the new filter. Plain pleated, right size, not the thirty dollar one that chokes the blower. Date on the edge. Grilles back on. Pull every bag out and COUNT them. THE HONEST LIMIT. A real duct cleaning, the truck kind, cuts into the main trunk, puts the whole system under suction, and runs air whips from every register. That reaches the long runs under the floor that your hose never will. Worth it when you can see mold, when mice have lived in there, after a big remodel, or when a duct is packed solid. Expect four hundred to a thousand dollars for an honest job, quoted up front, from a company that does not say "mold" until they show you the mold. Take ONE register off in a bedroom this weekend and look inside. Then take the return grille off and photograph the back of it before you wash it. Post it in the comments. The dryer vent comments were a museum, this is the same family. Tell me your county and how old the house is, I read every one. My wife's channels: Clean The Mexican Way · Cook The Mexican Way