GENERAL AIRSTAGE LPAS1 36,000 BTU Wall Mounted Heat Pump Greater Montreal, Laval, Longueuil, South Shore and North Shore

GENERAL AIRSTAGE LPAS1 36,000 BTU: the big Fujitsu Wall-Mounted Heat Pump, renamed, for the high-ceilinged loft or workshop in Mile End or Saint-Henri

A Saint-Henri loft or a Mile End workshop does not cool like a bungalow living room: the air volume is double, the heat rises and gets lost under the ceiling, and the factory windows turn July into a greenhouse. That is the kind of space we propose the GENERAL AIRSTAGE LPAS1 36,000 BTU for, and one point comes before everything else: it is exactly the same machine as the Fujitsu AIRSTAGE LPAS1. Same indoor unit ASUH36LPAS, same outdoor unit AOUH36LPAS1, same AHRI certificate 207590837, same values published by the manufacturer, same warranty. Fujitsu General Limited became GENERAL Inc. on January 1, 2026; the logo changes, the machine stays.

So this page is about volume, airflow and ceiling height, the three things that decide whether a wall-mounted heat pump of this size makes a large space pleasant or merely less unpleasant. It is also about the model's limits, because a loft should choose its machine with eyes open: heating guaranteed down to −15 °C, not beyond, and no place in the grant programs. You will know exactly what you are buying.

GENERAL or Fujitsu AIRSTAGE: the same machine

The new name comes down to two dates. In August 2025, Paloma Rheem Holdings, owner of Rheem since 1988, bought Fujitsu General; on January 1, 2026, Fujitsu General Limited became GENERAL Inc. Nothing moved in Kawasaki, Japan, where the head office and the research and development centre still are; the factories, the AIRSTAGE products, the model numbers and the warranty program are the ones from before. GENERAL is, in fact, a name older than most of the industrial buildings we air-condition: it has served as a trademark since 1946, and the company, founded in 1936, marks the 90th anniversary of its founding in 2026. For Canada, Rheem Canada has handled sales since February 2026 and Groupe Master remains our distributor.

For as long as the transition lasts, the LPAS1 reaches you with either logo on the carton. We publish both pages so that nobody believes they are buying a different model, and the table that follows puts every value of the GENERAL version opposite the Fujitsu version.

The twin page is here: Fujitsu AIRSTAGE LPAS1 36,000 BTU, and you will find the same model numbers and the same values on it.

Volume before floor area. In a loft, the square-foot calculation lies: a ceiling twice as high as a house ceiling means twice as much air to cool, plus brick walls that store the afternoon sun and give it back until midnight. 36,000 BTU, the largest capacity offered in a wall-mounted unit in the AIRSTAGE range, is the answer to that volume. The SEER2 of 18.0 describes the efficiency of the air conditioning over a whole season, and the EER2 of 8.1 describes the same efficiency at the worst moment, at full output in a heat wave. We say it as it is: this machine is built for capacity first, not to break efficiency records, and in a loft in the middle of a heat wave, capacity is what makes the difference between a space you can live in and a space you flee.

Airflow and ceiling height. The LPAS1's indoor unit is the large AIRSTAGE format: 45.25 in wide, a little over 13 in high, designed to push air far. In a high-ceilinged space, we mount it high on the longest wall, so that the jet of cold air runs along the ceiling, cools as it falls and sweeps the space without dropping onto a workstation. In heating, the logic reverses: warm air wants to stay up high, so we aim the louvers downward and we recommend a ceiling fan in reverse to bring the heat back down to head height. The indoor unit's fan runs from 32 to 50 dB(A): at full speed you hear it, which matters not at all in a woodworking shop and a little in a lived-in loft, where the machine spends most of its time at the low speeds once the temperature is reached.

Heating down to −15 °C, and knowing what happens below. According to the values published by the manufacturer, the LPAS1 delivers 22,400 BTU/h at −8 °C, an ordinary December temperature in Montreal, and 25,200 BTU/h at −15 °C, 70% of its nominal size, with a COP of 1.80. COP is the number of units of heat returned for each unit of electricity consumed: at 1.80, the heat pump still heats almost twice as much as electric radiators for the same current. The HSPF2 of 9.6 sums up the same idea over an entire season. Beyond −15 °C, the manufacturer no longer guarantees heating: the loft therefore keeps its current system for the coldest nights, and the heat pump takes fall, spring and the greater part of winter. We also say this plainly: the model is not ENERGY STAR certified, is not rated for cold climates, and is not on the list of equipment eligible for Hydro-Québec's LogisVert program. We will promise you no amount for it.

Installation in an industrial building. A loft or a workshop imposes its own constraints on our refrigeration technicians, and we settle them at the site visit rather than on the day of the work:

• The walls: solid brick or concrete, so a clean core drill to pass the refrigerant line, the cable and the drain through a single opening.
• The refrigerant line: insulated 3/8 and 5/8 in copper, the format for this capacity, with the most direct route possible to the outside.
• The outdoor unit: 37 in wide and 31 in high, placed on the roof or in the back yard depending on what the building owner or the syndicate allows, at 54 dB(A), with clearance for air and defrost water.
• Drainage: by gravity to the outside when the slope allows it; otherwise a condensate pump, planned in the quote and not discovered on installation day.
• Power supply: a dedicated 208/230 V circuit, sized from the nameplate and connected by a licensed electrician.
• Wi-Fi: offered as an option on this model; if you want to set the workshop from your phone before you arrive, tell us at quote time.

Maintenance and filters in a dusty space. The indoor filters pull out by hand and rinse under water; in a workshop where people sand or cut, they clog much faster than in a house, and a blocked filter drops the airflow before anything else. Rinse them often. Once a year, a refrigeration technician checks the R-410A refrigerant charge, cleans the indoor coil, the pan and the blower wheel, and makes sure the outdoor unit breathes. The warranty, identical under both names, covers the compressor and parts for 12 years and labour for 6 years; an extended warranty is possible, ask us for the details.

Who this model is for. The residential loft where one large room serves as living room, kitchen and office under a factory ceiling; the artist's or woodworker's workshop that has to be livable in July and tempered in November; the small open commercial space, photo studio or classroom, where a single well-placed wall unit replaces noisy window air conditioners. If your space is partitioned, if the ceiling hides beams that would block the air jet, or if you want to do entirely without backup heating in deep cold, we will steer you toward another configuration rather than force this one.

Free quote for your loft or workshop, from Mile End to Saint-Henri and across Greater Montreal

Call us at 514 316-2973 or fill out the free quote request online. Our estimator measures the ceiling height, looks at the window orientation, the possible route of the refrigerant line, the roof access and the electrical panel, then hands you a written quote for the right capacity, which is sometimes this one and sometimes another. We install the GENERAL AIRSTAGE LPAS1 36,000 BTU in Montreal, Laval, Longueuil, on the North Shore and on the South Shore.

An RBQ-licensed HVAC contractor and AIRSTAGE Elite Plus installer, AirGreen hands you the same machine, under the GENERAL name or the Fujitsu name, with the same service after the installation. In a large space, the right model counts as much as the right installation, and we take care of both.