hvac · Utah home tips
What Inversion Season Does to the Air Inside Your House
When the gunk settles over the valley, your furnace filter becomes the hardest-working part in the house. What to check, what to upgrade and when to leave it alone.
Every Wasatch Front winter has a stretch where the mountains disappear. Cold air sits in the valley, warm air sits on top like a lid, and everything the valley produces stays down here with us. That’s an inversion, and while the news covers what it does outside, most of your day happens indoors.
Your house breathes the same air the valley does
Houses aren’t sealed boxes. Outdoor air leaks in around doors, windows and a hundred small gaps, and it brings fine particulate with it. You can’t stop that entirely. What you can control is what happens after: your furnace pulls every bit of air in the house through a filter several times an hour, all winter long.
That makes the filter the whole ballgame during an inversion.
Check the filter monthly, not seasonally
A standard one-inch filter that normally lasts 90 days can load up in half that time when the furnace runs daily through bad-air weeks. A loaded filter does two bad things at once. It stops catching much of anything, and it makes the blower work harder, which shows up on your power bill and eventually on a repair invoice.
Hold the filter up to a light. If you can’t see light through it, it’s done.
When an upgrade makes sense
A thicker media filter (four or five inches instead of one) catches finer particles and lasts months instead of weeks. The catch: filters that grab more also resist airflow more, and not every blower can push through a high-efficiency filter without strain. Matching the filter to the system matters more than buying the highest number on the shelf.
Dry air is the other half of winter comfort here. Utah winter air is desert dry to begin with, and heating it drops the relative humidity even further. A whole-home humidifier mounted on the furnace holds the house in the 30 to 40 percent range, which is the difference between static shocks and cracked trim, and a home that feels warmer at the same thermostat setting.
What to leave alone
Skip the ozone-generating gadgets and the window-unit purifiers running in one room while the furnace circulates the other 95 percent of the house. Money spent on the system that already moves your air goes further.
Next step: Indoor air quality on the Wasatch Front or call us at 801-218-2225.