Guides
Dryer vent & air duct guides
Plain answers to what people ask before they call: how often, the warning signs, what the code says, what it costs and when it isn’t worth it.
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Dryer Vent Cleaning
- How Often Should You Clean Your Dryer Vent?Once a year for most homes: NFPA recommends cleaning lint out of the dryer vent annually, or more often if clothes start taking longer than normal to dry. Long runs with several turns, upstairs laundry rooms and vents with a stuck flap or a nest usually need attention sooner.
- Signs Your Dryer Vent Is Clogged, and What to DoThe clearest signs are clothes still damp after a normal cycle, clothes that come out hotter than usual, a burning smell, and little or no air blowing out of the outside vent while the dryer runs. If you smell burning, stop using the dryer until the vent is cleared.
- Dryer Vent Code: Maximum Length, Booster Fans, Screens and Foil HoseUnder the 2021 International Residential Code, a dryer exhaust duct can run up to 35 feet, minus 5 feet for every 90-degree turn and 2.5 feet for every 45-degree turn, unless the dryer maker’s instructions allow a different length. Domestic booster fans and screens at the outside vent aren’t allowed, and local amendments can change the details, so check with your building department.
- How Much Does Dryer Vent Cleaning Cost?Published figures put dryer vent cleaning at about $140 on average nationally (Angi), with standard vents around $80–$185 and roof vents around $150–$250 (HomeGuide). Where the vent comes out, how long the run is and whether there’s a nest or heavy buildup decide where your home lands in that range.
Air Duct Cleaning
- Is Air Duct Cleaning Worth It? What the EPA Actually SaysSometimes. The EPA suggests considering air duct cleaning when there’s substantial visible mold inside hard ducts, when ducts are infested with rodents or insects, or when dust and debris come out of the supply registers, and it says duct cleaning has never been shown to prevent health problems.
- $99 Air Duct Cleaning: What’s Really Behind the CouponA $99 whole-house duct cleaning price almost never covers the whole house. NADCA warns homeowners about low-price whole-house specials that clean only part of the system and lead to upsells, and in 2020 a Washington State court ordered $10 million in penalties in a case over robocalls and $29–$55 duct cleaning coupons that didn’t disclose only half of the heating and cooling system was included.
- Air Duct Cleaning vs. Dryer Vent Cleaning: What’s the Difference?They’re two separate systems: air ducts carry heated and cooled air to your rooms, while the dryer vent is one duct that carries hot, lint-filled air from the dryer to the outside. Air duct cleaning doesn’t include the dryer vent, and building code requires the dryer exhaust to be independent of all other systems.
- How Much Does Air Duct Cleaning Cost?The EPA puts typical air duct cleaning at $450 to $1,000 per heating and cooling system, and Fixr reports $300 to $700, averaging $500 for a 2,000-square-foot home. The number of systems, vents and returns, how easy the ducts are to reach and how dirty they are set the price.
Outdoor AC Unit Cleaning
- How to Clean Your Outside AC Unit, and What Not to DoTurn the system off, clear leaves and debris from around the unit, and rinse the coil fins gently with a garden hose. Never use a pressure washer, because the thin aluminum fins bend easily and bent fins block airflow; once a year before summer is a good rhythm.
- How Much Does Outdoor AC Unit Cleaning Cost?HomeAdvisor reports $75 to $200 to clean an outdoor condenser coil, and Homewyse estimates $119 to $312 per unit. The number of outdoor units, how clogged the coils are and how easy the units are to reach set the price.
Cobweb Removal
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