How Old Is My Furnace or AC? Find the Date on the Data Plate
Find 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.
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Central Minnesota Heating and Cooling repairs and replaces furnaces, ACs, heat pumps and boilers in North Oaks (Ramsey County), about 11 miles from downtown Minneapolis.
In North Oaks, a tune-up starts at $129 and a furnace replacement runs $4,500–$9,500 installed, quoted flat-rate in writing. Grown from James J. Hill's farm around Pleasant Lake, it is a private community where homeowners own the roads and lots start at an acre.
Electricity depends on your address: Xcel Energy serves most of North Oaks, but the city's 2040 plan lists the Deer Hills development on the electric cooperative now called Connexus Energy.
Updated October 27, 2026 · By Eric Brown, owner, Central Minnesota Heating and Cooling

Around town: Pleasant Lake · Gilfillan Lake · Wilkinson Lake · North Oaks Golf Club · James J. Hill North Oaks Farm. Neighborhoods: East Oaks · Rapp Farm · Deer Hills · Charley Lake Preserve
Book in North OaksJames J. Hill bought the land in 1883 from Charles Gilfillan and built it into a leading experimental farm. Gilfillan had already given the St. Paul water company rights to the lakes, and Saint Paul Regional Water Services still holds water rights on Pleasant, Deep, Charley and Wilkinson lakes. After Louis Hill died in 1948, his children formed the North Oaks Company. Building began around 1950 in the south-central part of the city with an 18-hole golf course and the restoration of Gilfillan Lake, then moved north around Pleasant Lake in stages, with lots and roads laid along the contours.
The first homes were planned with rural services: private wells, septic systems and electric power. Today some houses are on Shoreview or White Bear Township water and sewer while others keep their own well and septic, and electric lines have gone underground since 1968. The East Oaks development, approved in 1999, added the newest neighborhoods and townhomes. For heating and cooling the spread is wide: 1950s and 1960s houses on their third or fourth furnace, big later homes where two systems may come due at once, and new construction tight enough to need planned ventilation.
Winter air in a large North Oaks house runs dry, and the furnace humidifier does a lot of work. In homes on a private well, it runs on well water, which in Minnesota is usually hard, and the minerals scale the water panel, clog the valve's inlet strainer and crust the drain line within a season or two. A humidifier that quietly stops working shows up as static shocks and gapping floorboards by January. Replace the panel each fall, check the valve and drain then, and turn the humidistat down as it gets colder so big windows don't frost.
North Oaks' tree cover shades a lot of condensers, which helps a little, but leaves, seeds and fluff pile against the coil fins, and a unit tucked into shrubs or under low branches ends up breathing its own hot exhaust. Large two-story houses add their own pattern: the floor under the roof carries the biggest cooling load, so an upstairs system works hardest, and a single system lags upstairs on the hottest days. Keep brush back to the clearances in the manual, rinse the coil in June, and have upstairs airflow checked before blaming the equipment.
Most North Oaks homes are Xcel Energy customers for both gas and electricity. Xcel's furnace rebates reward high-efficiency gas models, for its heat pump rebates, ask whether the rebate needs a registered contractor. Its rebate sheet also includes ground-source systems. Deer Hills homes are on Connexus Energy instead (see the FAQ below). Geothermal lost its federal help when the 25D tax credit ended for systems placed in service after December 31, 2025.
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 North Oaks and nearby towns in Ramsey County, about 11 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 North Oaks 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.
Check before you schedule. NOHOA requires Architectural Supervisory Committee approval for any change to the exterior of a property, and a condenser in a new spot, a ductless outdoor unit or new wall vents for a furnace can count. A like-for-like swap in the same place may be simpler, but ask NOHOA. Separately, the City of North Oaks requires its own mechanical permit and inspection for HVAC work.
Mainly your rebates. The city's 2040 plan lists Deer Hills as the one North Oaks development that gets its electricity from the cooperative now called Connexus Energy, while gas still comes from Xcel Energy. Heat pump and AC rebates would come from Connexus, which covers air-source, mini-split and geothermal heat pumps and central air, while a gas furnace rebate still comes from Xcel. Your electric bill shows which utility you have, so look before you buy.
One that doesn't waste much water. A flow-through humidifier runs fresh water over its pad and sends much of it down the drain, which means more well-pump cycles and more water into the septic system. A drum or steam humidifier wastes less, though each needs its own upkeep, and all of them scale faster on hard well water. If the furnace condensate also drains to the septic, ask us about a neutralizer on that line.
Room and a plan. A horizontal loop needs open ground clear of the well, the septic drainfield and big trees, while a drilled vertical loop fits a smaller area but needs a Minnesota Department of Health permit and an MDH-licensed contractor. Xcel's rebate sheet lists ground-source heat pumps, and Connexus lists them for Deer Hills homes.
Find 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 guideWhy a Minnesota basement stays damp with the AC running, signs you need a whole-house dehumidifier, sizing and install, and the $1,500–$3,500 national cost.
Read the guideRheem vs Goodman central AC for a Minnesota home: who owns each brand, R-454B vs R-32, matching tiers, warranty registration and the $5,200–$9,800 install.
Read the guideBrands we service in North Oaks: Carrier · Trane · Lennox · Goodman · Rheem · Mitsubishi Electric · Daikin · American Standard · Navien · Weil-McLain · and every other major brand
Heat out in North Oaks? Call or send a request.