GENERAL AIRSTAGE CENTAURI XLTH R32 Central Heat Pump | -26°C | 3 Tons - 36000 BTU

GENERAL AIRSTAGE CENTAURI XLTH 36,000 BTU Central Heat Pump: turning the page on heating oil

To replace an oil furnace, this GENERAL AIRSTAGE CENTAURI XLTH 36,000 BTU (3-ton) system brings together the AMUH36KUAS air handler and the AOUH36KUAH1 outdoor unit. Down to the last bolt, it is the machine on the Fujitsu AIRSTAGE CENTAURI XLTH twin page: the manufacturer, known since January 1, 2026 as GENERAL Inc., publishes the same spec sheet for both and applies the same warranty.

The house in question has a duct system, an old oil furnace in the mechanical room and occupants determined to be done with it for good: no more deliveries, no more tank to keep an eye on, no more smell when the burner starts. The XLTH outdoor unit is made for that kind of decision: its extra-low-temperature heating goes down to −26 °C, according to the manufacturer.

A frank word about backup: even with an XLTH unit, you need some. Below −26 °C, or when the house asks for more than the heat pump can deliver, an electric heat kit takes over. The whole point is to keep it as a last resort.

GENERAL or Fujitsu AIRSTAGE: the same machine

Only the name changed: as of January 1, 2026, the former Fujitsu General Limited began signing as GENERAL Inc., and its American subsidiary was renamed the same day. In Kawasaki, you find the same head office and the same research centre; the factories, the AIRSTAGE products and their model numbers have stayed the same. The Fujitsu brand, for its part, is being phased out gradually.

Until then, the same central heat pump goes by two names on the market. AirGreen, an AIRSTAGE Elite Plus installer, publishes both pages and lets the table below speak for itself: every value is listed, column against column.

Here is its twin, for comparison: Fujitsu AIRSTAGE CENTAURI XLTH 3-ton central heat pump.

The big advantage of a house heated by a forced-air oil furnace is that the ducts are already in place. The AMUH36KUAS replaces the furnace in the mechanical room; once the ducts are checked at the visit, it connects to the existing plenum and return air. Its size is 21 × 21 × 48 in. (W × D × H), and multi-position mounting leaves the choice between upflow, downflow (with the UTD-DFMMB1 kit) and horizontal, on either side. The burner, the chimney and the tank leave the heating circuit; removing the tank is planned separately.

One caution, though. If your oil furnace feeds hot-water radiators rather than ducts, this system does not install as is, and we will tell you so on the first call.

You should also know that a network designed for an oil furnace used to blow very hot air in short bursts. With a heat pump, the air comes out milder and circulates longer, hence the importance of the ducts and the return air. The unit moves up to 1,207 CFM, at an external static pressure between 0.2 and 0.8 in. WC. Grilles that are too small or a choked return show up at the visit, when we map out the network and count the grilles.

On paper, the system holds ENERGY STAR cold climate certification (ID 4511773) and ratings of SEER2 18.3, HSPF2 10.2 and EER2 11.4, recorded on AHRI certificate 217895717. The certification provides two test points that are independent of each other, which we present without any calculation: 25,200 BTU for a COP of 2.9 at −8 °C, then 41,000 BTU for a COP of 1.98 at −15 °C. As a bonus, the house gains air conditioning, available from −21 °C to 50 °C according to the manufacturer. For the rest of the efficiencies and the dimensioned drawings, see the manufacturer's spec sheet attached to the page, available in French and English.

For backup electricity to truly remain a last resort, it all comes down to configuration. The air handler supports several backup heat logics, and we choose the one that keeps the kit in reserve as long as possible for your house. Sold separately, the manufacturer's compatible electric kit needs its own power supply, on top of the 208/230 V circuit reserved for the system (MCA 30 A, MOP 30 A). A house going from oil to all-electric therefore adds two loads to its panel: we check the electrical service before giving you a price.

For connections, the built-in input/output terminals can take an air exchanger (HRV or ERV), a humidifier, third-party backup heat, a door switch or a fire alarm. The unit also includes a leak detection system.

In the mechanical room, the air handler runs between 31 and 46 dB(A). The R-32 AOUH36KUAH1 is rated at 58 dB(A); at 39.31 × 12.60 × 37.01 in., it deserves a carefully chosen spot, away from roof edges where snow and ice fall. Raised on a base or a bracket, it is linked to the indoor unit by a cable, a drain and a 3/8 and 5/8 in. refrigerant line; the exact route is decided on site, and commissioning is done by a refrigeration technician. In July, the system dehumidifies at a rate of 3.82 pints/h, according to the spec sheet.

No control is delivered with the unit. Depending on your habits, it will be the AIRSTAGE Mobile app over Wi-Fi, a 24 V thermostat of your choice through the UTY-TTRXZ1 interface, a KAGAMI UTY-RVRU or UTY-RNRUZ5 wall controller, or a wireless remote with its IR kit; BACnet and Modbus are more for buildings managed remotely. Service monitoring goes through compatible controllers.

Maintenance takes on a new look. No more chimney sweeping or burner tuning: what remains is the filter, reached through the access panel planned at installation (on an optional 20 × 20 in. base), and an outdoor unit you keep clear.

Listed under LogisVert, this system was shown at $3,024 on the list Hydro-Québec had as of October 27, 2026. Hydro-Québec updates this list; the version on the day of the application is the one that applies. Finally, the warranty: compressor 12 years, parts 12 years, labour 6 years.

This system is for owners who have ducts and want to leave oil behind for good. The 3-ton capacity is confirmed at the visit, based on insulation, windows and the state of the network; AirGreen, an HVAC contractor, does that calculation before any quote.

Leaving oil behind in Saint-Colomban and on the North Shore: free quote

Saint-Colomban, the rest of the North Shore, Laval, Montreal, Longueuil and the South Shore: that is our territory for this GENERAL AIRSTAGE CENTAURI XLTH system. At 514 316-2973, you get a free quote, preceded by a visit of the furnace, the ducts, the electrical panel and the intended spot for the outdoor unit.

If you have them, pull out your oil delivery records. They show in black and white how much the house burned each winter.