Replacing AC in River Falls, WI: RFMU, Permits and Sizing
Replacing central air in River Falls, WI: Manual J sizing, heat pump and ductless options, RFMU and Focus on Energy programs, and $5,200–$9,800 installed.
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Central Minnesota Heating and Cooling repairs and replaces furnaces, ACs, heat pumps and boilers in Hudson (St. Croix County), about 25 miles from downtown Minneapolis.
Hudson sits on the St. Croix at the Wisconsin end of the I-94 bridge, a lumber-era river town that has grown quickly as a commuter city since 2000.
Updated October 27, 2026 · By Eric Brown, owner, Central Minnesota Heating and Cooling

Around town: St. Croix River · Octagon House Museum · Birkmose Park · Phipps Center for the Arts · Interstate 94 St. Croix River bridge
Book in HudsonHudson's riverfront grid, laid out when the town was a lumber and steamboat port, holds the oldest houses: Italianate and Queen Anne homes and plainer frame houses from the 1850s through about 1920, many on stone foundations. Their basements are often divided by old foundation walls, so a modern furnace ends up wherever there's headroom, with ducts routed around beams and chimneys and upstairs rooms fed by long runs.
Postwar ramblers and split-levels filled the blocks up the hill from downtown. Then the commuter boom arrived, most of it after 2000, with subdivisions of two-stories, walkouts and townhomes spreading out from the old town as the population grew by roughly two-thirds in twenty years. One- and two-family homes built in Wisconsin since 1980 fall under the state's Uniform Dwelling Code, so Hudson's newer houses were built to Wisconsin's rules for insulation, venting and ventilation rather than Minnesota's, even though many owners work across the river.
Hudson's downtown sits below a steep hill, and the St. Croix valley holds cold air on calm nights, while homes on top take the west wind coming across the river. Older houses near downtown lose heat through thin walls and original windows. In the newer subdivisions, PVC intake and exhaust pipes on side walls ice up or get buried by drifts. Wisconsin requires a carbon monoxide alarm in the basement and on each floor level of any home with a fuel-burning appliance or attached garage, so check them when the furnace starts up in fall.
The St. Croix brings river humidity to the downtown blocks, and older basements there stay damp through July. Newer two-stories and walkouts, built tight with builder air conditioners, often feel cool but clammy, because an oversized AC shuts off before it removes much moisture. Townhome rows put condensers close together, where they share each other's hot air. Cottonwoods along the river shed fluff in June, and a coil rinse keeps it from choking the condenser.
Minnesota rebates stop at the river: efficiency incentives in Hudson run through Focus on Energy, Wisconsin's statewide program, which works with participating utilities including Xcel. Focus on Energy also runs the income-qualified HEAR rebates, which require an IRA Registered Contractor, so ask whether your project qualifies and who can install it. Offers change during the year, so check Focus on Energy's current list before you buy.
Rebate programs change every year; check the utility's current terms before you buy. Our guides: mini-split costs and Focus on Energy rebates in Hudson, WI, what happened to the federal credits.
Central Minnesota Heating and Cooling, owned by Eric Brown and in business since 2009, serves Hudson and nearby towns in St. Croix County, about 25 miles from downtown Minneapolis. We're open 7 days, 7am–9pm, and no-heat calls get priority. Call 612-429-3465.
An HVAC service call in Hudson is a flat $79 trip charge, waived when you approve the repair. You get a written price before any work. Installed prices are on our pricing page.
Yes, the radiators usually stay. A standard-efficiency boiler uses the existing chimney, while a condensing boiler vents through PVC and needs a condensate drain. We size either one from a heat-loss calculation, not the old nameplate, and if the water heater is left on the chimney after the swap it may need a liner.
In places, yes. One- and two-family homes in Wisconsin fall under the state's Uniform Dwelling Code rather than Minnesota's codes, and permits come from the local building inspector where required. We work to Wisconsin's rules on Wisconsin jobs. Venting clearances, gas piping and combustion air get checked against the manufacturer's instructions and Wisconsin code, and we confirm CO alarms meet Wisconsin's placement rule.
An HRV can frost its core in deep cold if the defrost cycle isn't working or the airflows are out of balance, and its drain line can freeze if it runs through a cold space. The fixes are a working defrost function, balanced supply and exhaust, a clear drain and outdoor hoods free of ice. In a tight home, a working exchanger is what keeps winter humidity and window frost in check.
Usually, yes. Upstairs rooms in subdivision two-stories often have one return, long duct runs and big west-facing windows, so the downstairs thermostat shuts the system off before the bedrooms catch up. Measuring airflow usually shows the upstairs is short a return; balancing the dampers and adding one where the duct path allows often fixes it. For a walkout or townhome with a spot the ducts can't reach, a ductless head is another option.
Replacing central air in River Falls, WI: Manual J sizing, heat pump and ductless options, RFMU and Focus on Energy programs, and $5,200–$9,800 installed.
Read the guideFurnace repair in Prescott, WI and nearby Pierce County towns: common no-heat causes, propane quirks, Wisconsin programs, and our $79 trip charge.
Read the guideThe federal 25C and 25D credits ended after December 31, 2025, and Minnesota's state rebates haven't launched. See what Xcel, CenterPoint and co-ops offer.
Read the guideBrands we service in Hudson: Carrier · Trane · Lennox · Goodman · Rheem · Mitsubishi Electric · Daikin · American Standard · Navien · Weil-McLain · and every other major brand
Heat out in Hudson? Call or send a request.