4-U Electric & HVAC
HVAC Services

Comfort that holds up from -20° to 90°.

Furnace and AC replacements, cold-climate mini-splits, indoor air quality, and 24/7 emergency service across the Twin Cities. We right-size with a real load calculation, commission with real measurements, and stack every CenterPoint and Xcel rebate you qualify for.

High-efficiency residential furnace with PVC intake and exhaust venting, supply plenum, and ductwork in a Minnesota basement utility room
What HVAC Covers

The work that happens around every install

A furnace or AC is only as good as the design and commissioning behind it. Here is what we do on top of the line items above.

  • Manual J and Manual D load and duct sizing, so the system is right-sized for your house, not a rule of thumb.
  • Commissioning with real measurements: static pressure, temperature split, superheat and subcool.
  • CenterPoint and Xcel rebate paperwork, filed on your behalf so the credit actually shows up.
  • Duct sealing and airflow diagnostics when the old ductwork is fighting the new equipment.
  • Smart thermostat integration and zoning, wired and commissioned the way the manufacturer intended.
  • Indoor air quality: media filters, UV treatment, and HRV or ERV ventilation for tight modern homes.

No heat? No cooling? No cold calls next winter.

Free estimates on planned replacements, 24/7 dispatch for emergencies, and rebate paperwork handled on your behalf. Serving Waverly, Buffalo, Minneapolis, and the Twin Cities metro.