GENERAL AIRSTAGE INFINITE COMFORT 24RGLXM Central Heat Pump of 2 Tons in Montreal, Laval, Longueuil, South Shore and North Shore

GENERAL AIRSTAGE INFINITE COMFORT AMUG24LMAS 24,000 BTU (24RGLXM System): the Mid-Season Central Heat Pump for a Home Already Fitted with Ductwork

The 24RGLXM system pairs the AMUG24LMAS multi-position air handler with the AOU24RGLX outdoor unit. Bolt for bolt, it is the same machine as the Fujitsu AIRSTAGE shown on our 2-ton INFINITE COMFORT page: the manufacturer simply took the name GENERAL Inc. on January 1, 2026. Its spec sheet does not change, and neither does its warranty.

The scenario here is very concrete. Your home, in Mile-Ex or nearby, already has ductwork and a furnace. You want air conditioning in summer, a heat pump that takes over in spring and fall, and a dependable heat source for the deep cold of January. This system meets the first two needs well. For the third, the answer depends on your furnace, and we would rather be clear from the start.

One more thing to say up front: the 24RGLXM does not carry ENERGY STAR certification, nor the cold-climate designation, and it does not appear on the LogisVert list. No Hydro-Québec grant is attached to it. If the grant weighs heavily in your decision, we will point you to a listed model.

GENERAL or Fujitsu AIRSTAGE: the same machine

Fujitsu General Limited's change of name follows a change of ownership: in August 2025, the company passed into the hands of Paloma Rheem Holdings, the firm that has owned Rheem since 1988. Rheem Canada took over sales in this country in February 2026; on our side, nothing changes, since Groupe Master remains our distributor. For the rest, same factories, same model numbers, same warranty program.

Because the Fujitsu brand is being phased out gradually, both labels still share the market. Rather than leave you guessing which one to buy, we publish both pages and a table that sets them side by side.

For the equivalent under the Fujitsu name, open the Fujitsu AIRSTAGE INFINITE COMFORT 2-ton page; you will find exactly the same specifications.

The principle is simple: two units, with a refrigerant line between them. Indoors, the AMUG24LMAS air handler goes in the basement, or else in a closet or a crawl space, and blows air through the home's ducts. Outdoors, the AOU24RGLX unit draws heat in winter and rejects it in summer. Unlike a simple coil set on top of a furnace, the AMUG24LMAS is a complete unit: it has its own all-aluminum coil and its own fan, whose motor has adaptive control.

That leaves the furnace. Since the air handler moves the air through the network itself, it usually takes the old furnace's place. For deep cold, the manufacturer provides an electric backup heat kit, factory-provided and installed on site in the unit. If you are set on keeping your furnace running on the same ductwork, that setup is validated on site, case by case, because two units blowing into the same ducts is not something you improvise. The external input/output interface, an option, exists precisely for interlocking with third-party systems; whether it suits your furnace still has to be confirmed on site. If your installation does not lend itself to it, we will tell you, and the backup kit will take over.

Now the heating numbers, with no makeup. The manufacturer states 27,000 BTU/h of heating at rated conditions, for 24,000 BTU/h of cooling. The certified listing shows 18,700 BTU at −8 °C and 19,800 BTU at −15 °C, the point where the COP reaches 1.80. Those two values come from separate test conditions; read them as published, without drawing a gap from them. The system heats down to −21 °C. Below that, backup does the work; in a house that loses a lot of heat, it may even come in earlier.

In cooling and mid-season, the picture is brighter:

• SEER2 of 17.6 and EER2 of 11.7;
• HSPF2 of 9.2;
• AHRI certificate 205123807;
• R-410A refrigerant and 3/8 and 5/8 in. connections.

In practice, the heat pump carries the house while temperatures stay moderate, which is where a heat pump is most at ease. The cool fall and spring days, when the furnace used to start up for a few hours of heating, become its natural territory. In summer, it cools the whole house through the ductwork, without a single window air conditioner.

Ductwork in older homes was not always designed for air conditioning: narrow sections, tight elbows, few returns. The AMUG24LMAS is forgiving here: it copes with static pressure as high as 1.0 in. WC, for a maximum airflow of 800 CFM. A tolerant machine does not replace a healthy duct network, though. During the visit, we check the ducts, the grilles and the return air, paying close attention to the upper floor, where summer heat builds up.

Noise matters in the city too. The indoor unit runs between 25 and 37 dB(A); outside, the AOU24RGLX unit shows 55.0 dB(A). In a dense area like Mile-Ex, where yards are small and neighbouring windows are close, we choose the outdoor unit's location with care, on a suitable pad or stand. It measures 35.44 × 13 × 32.69 in.

A few design details make the job simpler:

• true multi-position mounting: upflow, downflow or horizontal;
• downflow and horizontal right kits in the box, at no extra cost;
• minimum clearance on three sides, and 21 in. at the front for service;
• indoor unit of 21 × 21.69 × 42.5 in. (W × D × H).

The rest follows the usual order: duct inspection, supply and return air connections, refrigerant line, cable and drain to the outdoor unit, 208/230 V power supply and an access panel for the filter. A refrigeration technician takes care of commissioning, while AirGreen, an AIRSTAGE Elite Plus installer, runs the job.

On the controls side, this is a fully communicating heat pump paired with a conventional multi-position air handler. Wi-Fi is among the options; we pick the control with you based on how you live in the house.

For maintenance, a filter changed on time and a clean coil keep the system efficient, especially in cooling. For warranty, the manufacturer covers compressor and parts over 12 years, and labour over 6 years.

This system makes sense:

• for the home already fitted with ductwork that wants air conditioning and efficient mid-season heating;
• for the owner ready to rely on the electric backup kit, or to have the option of keeping the furnace validated;
• for anyone willing to do without a grant.

It makes less sense if you want to heat almost all winter with the heat pump or are counting on LogisVert. In that case, an ENERGY STAR Cold Climate certified model will be a better choice, and we will propose one without beating around the bush.

Mile-Ex: your free quote for a central heat pump

A free quote starts with a call to 514 316-2973. We come to look at your ducts, your furnace and the possible outdoor unit location, then explain clearly what the 24RGLXM system will do in your home, and what it will not.

AirGreen, an HVAC contractor, does this type of installation in Mile-Ex as everywhere in Montreal, as well as in Laval, Longueuil, the North Shore and the South Shore.