By Johnathan Mason, Ace Chimney Service.
These two get confused constantly, and they solve different problems. One is routine maintenance you handle yourself for a few dollars. The other is an occasional service for a specific condition. Getting the order right saves Huntley homeowners money and disappointment.
What the filter does
The furnace filter sits in the return path and catches particles before they reach the blower and the heat exchanger. Its first purpose is protecting the equipment; improving the air you breathe is a secondary benefit that varies enormously with the filter’s rating. It is the highest-value maintenance item in the entire system because it is cheap, accessible, and it works continuously.
Where people go wrong with filters
Three mistakes. Leaving one in far too long — a loaded filter stops catching and starts choking airflow, which makes the furnace work harder and can cause it to short-cycle. Fitting the wrong size so air slips around the edges, which means it filters nothing. And jumping to the highest-rated filter available without checking whether the system can move air through it; a very restrictive filter in a system not designed for it does more harm than the dust it catches.
What duct cleaning does
Duct cleaning removes debris that has settled inside the supply and return runs. It is a one-off intervention for a condition, not a maintenance interval. Good reasons to do it: visible debris blowing from registers, a remodel or construction that put dust into the system, water intrusion, rodent or insect activity in the ductwork, or a heavy-shedding pet household where the returns are visibly loaded. Our air duct cleaning service starts at $99.
What duct cleaning is not
It is not an annual requirement for a typical home, and it will not fix a dusty house on its own — ducts collect what the house produces, so cleaning them repeatedly without reducing the source is a treadmill. It is also not an allergy treatment. We would rather tell you your ducts do not need doing than sell you a service twice.
The sensible order
Get the filter right first: correct size, sensible rating for your equipment, and changed on condition rather than on a forgotten date. Vacuum registers and keep returns unobstructed. If after that the symptoms persist, or one of the specific triggers above applies, then duct cleaning is a reasonable next step. And if the house has a fireplace, none of this substitutes for the annual chimney inspection — the flue is its own system with its own risks.
Ace Chimney Service has 29 years in chimney, duct, and dryer vent work, is insured and bonded, and gives the price up front. Seven days a week, 7 AM to 7 PM, across Crystal Lake and McHenry County. Call (815) 320-0883 or see our services.
Frequently asked questions
How often should I change the furnace filter?
Check monthly and replace when it looks loaded. Pets, renovations, and heavy use all shorten the interval well below the box’s estimate.
Is a higher-rated filter always better?
No. A filter your blower cannot pull air through restricts the system. Match the rating to the equipment.
Does a dirty filter raise my heating bill?
It can. Restricted airflow makes the furnace run longer and less efficiently for the same comfort.
Do I need duct cleaning every year?
Most homes do not. It is condition-driven — remodels, water damage, pests, or visible buildup are the real triggers.
Will duct cleaning lower my energy bills?
Do not count on it. Any effect is modest, and claims of large savings are not something we will make.
Should the ducts be sealed as well as cleaned?
Leaky ducts waste conditioned air, but sealing is a separate service from an HVAC contractor.
Can I clean my own ducts with a shop vacuum?
You can clean registers and the first foot or so. Reaching the runs properly needs equipment designed for it.
Does duct cleaning include the dryer vent?
They are separate lines and separate tasks, though they are commonly booked into one visit.
Published September 12, 2026