4-U Electric & HVAC
All HVAC Services

Indoor Air Quality

Cleaner air in a sealed Minnesota home. Whole-home media filtration, HEPA bypass, UV germicidal, and ERV ventilation that brings fresh air in without losing the heat you paid to make. Sized to what you are actually trying to solve.

What We Offer

MERV 13+ whole-home filtration

Thick-media cabinet filters that remove allergens, dust, and wildfire smoke without choking the blower. Annual filter service included.

HEPA bypass filtration

True-HEPA bypass unit for severe allergies and asthma. Runs parallel to the main air handler so the furnace blower is not fighting the HEPA restriction.

UV germicidal lights

UV-C lamps installed in the air handler to keep the evaporator coil and drain pan clean. Meaningful efficiency and IAQ benefit, installed honestly.

ERV and HRV ventilation

Energy Recovery Ventilators that bring fresh outdoor air in and recover most of the heat and humidity from the stale air going out. Essential in tight Minnesota homes.

Whole-home humidification

Steam or bypass humidifiers sized to your home and climate. No more winter static shocks, cracked wood floors, or nosebleeds.

Get a Free Quote
Indoor Air Quality
Why It Matters Here

Cleaner air in a sealed Minnesota home

Minnesota homes are tight by necessity: we heat half the year. Tight homes trap dust, dander, pollen, wildfire smoke, and VOCs from finishes and cleaning products. We install whole-home media filtration, HEPA bypass filtration, UV germicidal lights, and ERV ventilation that brings fresh air in without losing the heat you paid to make.

HVAC Questions

Frequently Asked Questions

Common questions about indoor air quality in the Twin Cities metro. Don't see yours? Call us at 763-301-4829.

A well-sized MERV 13+ media filter or a HEPA bypass unit removes the particulate that causes most seasonal and pet-dander allergies. UV lights help with some biological contaminants but do not touch particulate. We recommend based on what you are actually trying to solve, not a one-size upgrade.
An Energy Recovery Ventilator brings fresh outdoor air into your home and exhausts stale indoor air, transferring most of the heat and humidity between the two streams so you do not waste energy. In a tight Minnesota home, an ERV is the difference between fresh-feeling indoor air and stuffy, high-CO2 winter air. We recommend one for any home under 2,500 square feet built or renovated in the last 15 years.
Inside the air handler, a properly sized UV-C lamp does a good job of keeping the evaporator coil and drain pan free of biological growth, which helps system efficiency and indoor air quality. In-duct UV for air purification is a more limited claim. We install both, but we are honest about what each one does.

Still have questions? We're happy to help!

Call us at 763-301-4829

Ready to Get Started?

Contact us for a free estimate on your indoor air quality project. Licensed in Minnesota (EA807270).

Schedule Service Call 763-301-4829