The quick answer
Quick answer
These aren't three versions of one product — they attack different problems. A 4–5" media filter cabinet is the workhorse: serious particle capture, low maintenance, no electricity. Electronic air cleaners chase finer particles like smoke with washable cells and a small power draw. UV lights don't filter air at all — they stop biological growth on the coil and drain pan. Match the tool to your actual complaint before spending anything.
- Start with the complaint, not the catalog: visible dust and allergies → media filter. Smoke and ultra-fines (woodsmoke summers, cigarettes, cooking) → electronic or high-MERV media. Musty AC smell and coil slime → UV.
- A deep-pleat media cabinet at MERV 11–13 is the residential sweet spot — real filtration without strangling airflow the way an over-tight 1" filter can.
- Electronic air cleaners trade filter purchases for cleaning chores: the cells are washable but only work as well as your cleaning schedule.
- UV bulbs quietly lose output long before they burn out — an annual bulb swap is part of the deal, or the purple light becomes decoration.
- None of these fix humidity, and none replace source control (shoes off, range hoods, sealed ducts). Honest IAQ starts there.
The decision factors
What's actually in your air
Pet dander, pollen, and dust are big-particle problems a good media filter handles. Wildfire-smoke summers and frying-pan haze are fine-particle problems that reward electronic cleaners or the highest MERV your blower tolerates. Biological funk — the dirty-sock smell, visible coil growth — is UV's one true job.
Your maintenance personality
Media cabinets ask for a filter swap once or twice a year. Electronic cells demand washing every one to three months to keep working. UV wants an annual bulb. Pick the upgrade whose chores you'll actually do — a neglected electronic cleaner underperforms a fresh media filter every time.
Your blower's airflow budget
Filtration always costs some airflow. A properly sized 4–5" cabinet costs the least per unit of capture; jamming a super-high-MERV 1" filter into a builder-grade slot costs the most and can starve the system. Static pressure — not marketing — decides what your ducts can afford.
Whether the coil is part of the problem
If the smell shows up when cooling starts, or the last tech showed you a slimy evaporator, UV attacks the source directly. If your air is fine and your coil is clean, UV is solving a problem you don't have.
Media filter cabinet vs Electronic air cleaner vs UV germicidal light
| What matters | Media filter cabinet | Electronic air cleaner | UV germicidal light |
|---|---|---|---|
| What it targets | Dust, pollen, dander — particles | Finer particles, incl. smoke | Mold and biofilm on coil/pan — not passing air |
| How it works | Deep-pleat passive filtration (MERV 11–13 sweet spot) | Charges particles, collects them on cells | UV-C light bathes the wet coil surfaces |
| Maintenance | Swap filter ~1–2×/year | Wash cells every 1–3 months | Replace bulb ~annually |
| Power use | None | Small, continuous | Small, continuous |
| Airflow cost | Low when sized right | Very low | None |
| Weak spot | Can't catch the ultra-fines | Only as good as the cleaning schedule; some produce trace ozone — ask for low-ozone certified models | Does nothing for dust or allergies |
The Wisconsin IAQ calendar
Southeastern Wisconsin closes its windows for five-plus months a year, which turns your furnace filter into the home's only air-cleaning pass all winter. That's the argument for doing filtration properly — a real media cabinet instead of the 1" builder slot — in this climate specifically. Add the northern wildfire-smoke episodes that now visit most summers, and the fine-particle story has gotten more relevant here, not less.
The UV conversation is a cooling-season story: air conditioning keeps the evaporator coil wet for weeks at a time, and a dark, wet, dusty coil is a petri dish. Homes that run AC hard — and homes that have already had the musty-smell service call — get real value from UV at the coil. Homes that barely cool may not. We'll tell you which one yours is; the $169 tune-up includes actually looking at the coil, which is more than a brochure does.
The honest numbers
IAQ equipment is quoted with your system's specifics (cabinet size, voltage, coil access). We don't publish ranges we haven't verified for our market.
| Option | Planning range | What that covers |
|---|---|---|
| Media filter cabinet (installed) | Quoted per home | Cabinet + transition sheet-metal work sized to your plenum; includes the first filter. |
| Electronic air cleaner (installed) | Quoted per home | Includes cells and controls; ask for low-ozone certified equipment — we spec it by default. |
| UV germicidal light (installed) | Quoted per home | Mounted at the coil; annual bulb replacement is the ongoing cost to plan for. |
We don't publish dollar ranges we haven't verified for our own market. For these jobs you get a written, itemized quote after an on-site look — and you're welcome to put it up against anyone else's number with our free second opinion.
Which one should you choose?
Media filter cabinet
Choose the media cabinet when
You want the biggest, most reliable IAQ improvement per dollar with the least fuss — which is most homes. Dust, dander, pollen, and general allergy load all drop, and the only chore is a filter swap at tune-up time. This is our default first recommendation, and it's the cheapest of the three.
Electronic air cleaner
Choose the electronic cleaner when
Fine particles are your specific enemy — smoke sensitivity, a wood stove, heavy cooking — and you'll honestly keep up with washing the cells. Done right it captures what media filters miss; done lazily it's an expensive spacer.
UV germicidal light
Choose UV when
The problem is biological: recurring musty smell when the AC runs, visible coil growth, or a household sensitive to mold. UV keeps the coil clean at the source. Pair it with decent filtration — it's a complement, never a substitute.
Also consider: duct cleaning first
If the ducts themselves are lined with construction dust or years of buildup, cleaning the pipes before upgrading the filter gets you more air quality per dollar — otherwise the new filter spends its first year catching what the ducts shed. See the duct cleaning vs duct sealing comparison for when each applies.
Ready when you are
Get the answer for your house.
Both options priced in writing, sized to your home, explained without a pitch — 24/7, owner-operated, licensed (WI #1482483). Already have someone else's quote? We'll review it for free.
Keep exploring
Next steps
Honest answers, before you decide
Can I just buy the highest MERV filter at the hardware store?
Careful — a very high-MERV 1" filter in a standard slot can choke airflow, freeze coils, and overwork the blower. The glossary rule we publish: match the filter to the system, not to a marketing claim. A deep-pleat cabinet exists precisely to deliver high MERV with acceptable airflow. Measuring static pressure tells the truth; we do that during tune-ups.
Do electronic air cleaners make ozone?
Some older and bargain designs produce trace ozone as a byproduct, which is exactly what sensitive lungs don't need. Certified low-ozone models are the answer — that's what we install, and it's a fair question to ask anyone quoting you one.
Will UV light clean the air in the rooms too?
Not meaningfully — air moves past the bulb far too fast for whole-air disinfection at residential intensities. Coil-mounted UV's honest job is keeping the wet coil and pan from growing things. Anyone selling UV as an air purifier is overclaiming; anyone selling it as coil protection is describing what it does.
Reviewed by Shane Herro, Owner & Lead Tech · Last updated 2026-07-14