Indoor air quality in Halden, MN
A Minnesota winter keeps houses shut for six months. Indoor humidity drops to 15%, and the dust, cooking smoke and CO from appliances have nowhere to go.
We measure before we sell anything. A typical visit starts with a humidity and CO reading and a look at your filter and ducts, and we tell you which fix will make the biggest difference.
Indoor air quality services (6)
Whole-home humidifiers
Raise winter humidity from 15% to a comfortable 30–35%, without fogging your windows.
$650–$1,350 installed
Air purification & filtration
Better filters in the furnace you already have, and purifiers for households with allergies or asthma.
Media filter cabinet $450–$900 installed
ERV & HRV ventilation
Fresh air for tight houses, without losing the heat you paid for.
$2,800–$5,200 installed
Duct cleaning
Honest duct cleaning: when it helps, and when it doesn't.
$450–$850 for most homes
Duct sealing & repair
Seal the leaks that send heat into your attic, crawlspace and garage.
$600–$2,400 depending on access
Carbon monoxide safety
CO testing on every fuel-burning appliance, and low-level monitors that warn before a standard alarm.
CO check included with every furnace and boiler visit
Recent jobs
See all previous work
Graystone · December 2025
Balanced ventilation for a tight new build
A new house so tight the windows frosted inside. An HRV and a rebalance fixed it.
West Halden · November 2025
Humidity and filtration for a family with asthma
Indoor humidity raised from 14% to 32%, with a MERV 13 filter for smoke season.
Indoor air quality: common questions
What indoor humidity should I aim for in winter?
About 35% when it is above 0°F outside, dropping to 25% below −10°F so windows don't frost. A whole-home humidifier with an outdoor sensor adjusts this automatically.
Is duct cleaning worth it?
Only in specific cases: after a remodel, pests, or visible mold. For most homes, a better filter and sealed ducts make a bigger difference, and we will tell you which applies.
Do I need a carbon monoxide detector if my furnace is new?
Yes. Every home with a gas, propane or oil appliance or an attached garage should have one on each level. We test CO at every visit at no charge.
Not sure what you need?
Tell us what the system is doing, what it sounds like, and how old it is. A dispatcher will tell you whether it sounds like a repair, a tune-up or something to watch, and book the right technician.
Book today
Cold house? Warm again by tonight.
Book online and we'll call back within 15 minutes during office hours with an arrival window. Flat $89 diagnostic, credited to the repair.