By Johnathan Mason, Ace Chimney Service.
The termination — the hood where the dryer vent exits the wall — is the cheapest component in the system and the one that causes the most trouble. It is also the only part you can inspect from the ground. Worth a look at every McHenry house before autumn.
What the hood is supposed to do
Two jobs: let exhaust and lint out, and keep weather and animals from getting in. A working termination has a flap or louvres that swing open under airflow and fall closed when the dryer stops. That is all. There should be no screen, no mesh, and no grille across the opening.
Why screens are the problem
Screening a dryer vent seems sensible and is the opposite. Lint catches on mesh immediately, mats into a felt, and blocks the outlet. Behind that blockage the whole duct backs up. The dryer runs longer, the motor works harder, heat and lint build in the line, and you have created the exact condition that makes dryer vents a fire risk. If your vent has a screen over it, remove it — and yes, that includes screens fitted by well-meaning previous owners.
What to use instead
A proper dryer vent hood with a damper flap, or a louvred model, or a float-style cover. If animals are a genuine concern, use a termination made for dryers with widely spaced bars or a purpose-built guard that does not obstruct airflow — not hardware cloth stapled over the opening. Birds nesting in a dryer duct is a real problem in spring, and the correct answer is a correct hood, not a screen.
The five-minute check
Run the dryer and go outside. You should feel a strong, warm airflow at the hood and see the flap standing open. Weak airflow, a flap that only opens a crack, lint packed around the opening, or a flap frozen shut all point to restriction. While you are there, look at whether the hood is cracked, sagging, or painted shut, and whether it has become a nesting site.
Signs the whole duct needs attention
Clothes taking more than one cycle. The dryer or the laundry room getting unusually hot. A burning smell. Lint appearing around the door seal. Those symptoms point past the hood into the duct run itself, which is a job for professional dryer vent cleaning rather than a shop vacuum at the wall.
Ace Chimney Service handles dryer vents alongside chimney and duct work. 29 years in the trade, insured and bonded, price up front, seven days a week from 7 AM to 7 PM across Crystal Lake and McHenry County. Call (815) 320-0883 or see pricing.
Frequently asked questions
Should a dryer vent have a screen on it?
No. Screens and mesh trap lint and block the vent, which is a fire risk. Use a hood with a flap or louvres instead.
How do I keep birds out then?
Use a termination designed for dryers with a proper damper or widely spaced guard. Never obstruct the opening with fine mesh.
Why is my vent flap not opening fully?
Usually lint buildup at the hood or in the duct, a painted or seized hinge, or a nest behind the flap.
Can I clean the hood myself?
You can clear visible lint from the outside and free a stuck flap. The duct run itself needs proper equipment.
How often should a dryer vent be cleaned?
Annually for most households, more often with a long duct run, a large family, or heavy pet hair.
Does a longer duct run need more attention?
Yes. Every extra foot and every elbow slows airflow and gives lint more places to settle.
Can I vent a dryer into the garage or attic?
No. Dryer exhaust must terminate outdoors. Venting into an enclosed space causes moisture damage and a lint hazard.
Is a plastic hood acceptable?
Rigid metal terminations hold up far better in our winters. Brittle plastic cracks and stops sealing.
Published September 11, 2026