R-22 AC in Minnesota: Repair, Recharge or Replace
Still running an R-22 AC in Minnesota? Repairs worth doing, reclaimed R-22 at $90–$150 a pound nationally, why retrofits rarely pay, and replacement.
Read the guide
Central Minnesota Heating and Cooling repairs and replaces furnaces, ACs, heat pumps and boilers in Columbia Heights (Anoka County), about 4 miles from downtown Minneapolis.
Columbia Heights grew up along the Central Avenue streetcar line, which ran from 1893 to 1951, so its houses are older and smaller than most in Anoka County: 1910s through 1950s bungalows, story-and-a-halfs and small ramblers.
Updated October 21, 2026 · By Eric Brown, owner, Central Minnesota Heating and Cooling

Around town: Huset Park · Central Avenue · Silver Lake · Sullivan Lake Park · Murzyn Hall
Book in Columbia HeightsThe village of Columbia Heights split from Fridley Township in 1898 with 20 houses, and Thomas Lowry's streetcar line up Central Avenue did the rest. By the early 1920s the blocks near Central had become a grid of bungalows, four-squares and small craftsman houses. Those homes started with coal-fired gravity furnaces or boilers, and today most have a gas furnace attached to the old large-diameter ducts, or a boiler still feeding the original cast-iron radiators.
The second wave came after World War II, when the rest of the city filled with story-and-a-halfs and small ramblers. In a story-and-a-half, the upstairs sits under the roof slope behind knee walls, and heat reaches it through one or two small ducts, if any. Four-squares have the opposite layout, a full second floor that depends on supply runs through interior walls. Both types have plaster walls and tight framing that make adding ducts slow work.
Columbia Heights houses lose heat the old-fashioned way: walls with little or no insulation, original windows and thin attic insulation, so a furnace that seemed fine in November struggles at 15 below. Story-and-a-half houses grow ice dams along the eaves where warm air leaks into the roof. Boiler homes have their own January calls, often a circulator pump that has seized or a zone valve stuck shut, leaving part of the house cold.
Upstairs rooms in Columbia Heights' story-and-a-halfs and bungalows sit right under the roof and heat up fast on July afternoons, and the one or two ducts that reach them were sized for heat. A ductless head at the top of the stairs is usually the most direct fix. In radiator-heated houses there's no ductwork to borrow at all, so cooling means mini-splits or a small-duct system run through closets and the attic.
CenterPoint's heating rebates cover high-efficiency boilers as well as furnaces, which matters in the older radiator houses, and you can use the dealer of your choice. Xcel's heat pump rebates, which include mini-splits and cold-climate mini-splits, work through its Trade Partner Network, so ask whether the rebate needs a registered contractor. CenterPoint's Home Energy Squad visit is a good starting point for air sealing.
Rebate programs change every year; check the utility's current terms before you buy. Our guides: Xcel and CenterPoint rebates, heat pump rebates, what happened to the federal credits.
Central Minnesota Heating and Cooling, owned by Eric Brown and in business since 2009, serves Columbia Heights and nearby towns in Anoka County, about 4 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 Columbia Heights 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.
Keep the boiler for winter and add cooling separately. Ductless mini-splits need one indoor head per area and a small hole for each line set, and as heat pumps they can take over some heating in spring and fall. A small-duct high-velocity system hides flexible tubing in closets and the attic instead. Either way, the radiators and plaster stay untouched.
Many houses from this era have one large central return, often in a floor grate or hallway wall. With a bedroom door shut, air pushed into the room has no easy way back, so it stays stuffy and the supply barely flows. Transfer grilles above the doors, jumper ducts through the ceiling, or a return in each bedroom fix it; trimming the bottom of the door helps a little.
Central air does work through gravity-era registers, but not as well as the system heats. Gravity-era supply registers often sit low on inside walls or in the floor, fine for rising warm air but poor for cooling, since cold air pools near the floor. The big old ducts move air easily; the trouble is usually too few returns and no duct at all to the second floor. Adding an upstairs return, or pairing central air with a ductless head upstairs, fixes most of it.
Maybe not, but it should be checked. Older boiler systems use a plain steel expansion tank strapped between the joists that holds a cushion of air. When it fills with water, pressure spikes each time the boiler fires and the relief valve drips. The tank can be drained and recharged, or replaced with a smaller diaphragm tank. A dripping relief valve or pressure that swings widely is the sign.
Still running an R-22 AC in Minnesota? Repairs worth doing, reclaimed R-22 at $90–$150 a pound nationally, why retrofits rarely pay, and replacement.
Read the guideSensi or Honeywell Home for a Minnesota house? Compare C-wire needs, heat pump staging and humidity control. HomeGuide puts installs at $225–$400 nationally.
Read the guideFind your furnace or AC's age on the data plate, then the install sticker or permit record. Serial decoder charts disagree by brand. Call 612-429-3465.
Read the guideBrands we service in Columbia Heights: Carrier · Trane · Lennox · Goodman · Rheem · Mitsubishi Electric · Daikin · American Standard · Navien · Weil-McLain · and every other major brand
Heat out in Columbia Heights? Call or send a request.