Heat collects upstairs and drains out of the basement, so one setting cannot serve both. Households usually settle it by arguing over a single thermostat, or by running fans and space heaters to patch the gap.

Two 9,000 BTU zones and two 12,000 BTU zones let each pair of rooms sit where it should, each with its own controller. Only the zones that are switched on draw from the 35,000 BTU outdoor unit.

Everything that arrives on the pallet

The photo is the full delivery: a 35,000 BTU outdoor unit, four indoor units rated 9,000, 9,000, 12,000 and 12,000 BTU, four remotes, the coiled copper line sets and the communication wire that ties each head back to the condenser. The system runs on R454B, a lower global warming potential refrigerant than the R410A on older equipment.

Four zones on one floor plan

The floor plan shows what four zones looks like in a real layout: two bedrooms, a living area and a fourth room, each with its own head and its own number. Hallways, kitchens and bathrooms usually borrow air from the rooms beside them rather than getting a head of their own.

4D swing and eight fan speeds

4D auto swing moves the louvres both ways, so air runs along the ceiling and drops back rather than blowing straight at whoever is sitting under it. The panel lists seven modes including ECO and sleep, and eight fan speeds starting at mute. A self clean cycle dries the coil after cooling.

The number that matters in February

The split background is the operating window: cooling up to 55°C (131°F) and heating down to -25°C (-13°F), with chassis electrical heating keeping the base pan clear. Natural Resources Canada points out that output falls as the outdoor air gets colder, so a backup heat source is still worth having.

One 35,000 BTU outdoor unit runs all four indoor units. Each zone starts, stops and holds its own temperature, so an empty room costs nothing to leave alone.

A common rule of thumb is 20 to 25 BTU per square foot (Carrier publishes 25). On that basis a 9,000 BTU unit suits roughly 360 to 450 sq ft and a 12,000 BTU unit suits roughly 480 to 600 sq ft. Natural Resources Canada points to CSA F280-12 for a proper load calculation.

The compressor varies its speed instead of cycling on and off. Published ratings are 22.5 SEER2 for cooling and 10 HSPF2 for heating on R454B refrigerant.

A chassis electrical heater keeps the outdoor base pan clear. The manufacturer rates heating down to -25°C (-13°F) and cooling up to 55°C (131°F).

Each zone gets a 16 ft insulated copper line set and 19 ft of communication wire, plus a drain hose. That is the material most quotes list separately, four times over on a system this size.

The outdoor unit runs on 208-230V 60Hz. This is not a standard 15 amp household outlet. It wants its own branch circuit, sized from the MCA and maximum breaker figures on the unit's own nameplate, with a disconnect within reach.

Wifi app, a remote with a digital display for each zone, and voice control through Alexa or Google Home. A 24 hour timer and a child lock are built in.

The indoor filters pull out, rinse under a tap and go back in. Four heads means four sets, and clean filters are the cheapest way to keep airflow and running cost where they should be.

Ships from our United States warehouse. Delivery to Canada usually takes 8 to 14 business days, with no customs charges or duties to pay on arrival. Free shipping on orders over $150, a flat $18.90 below that, and tracking by email as soon as it leaves.

Return within 14 days of purchase, unused, in original condition and packaging.

Covered directly by the manufacturer under their warranty terms for material and manufacturing defects.

Found it cheaper at a Canadian retailer? Send us the link and we will match that price. It has to be the same item, in stock, sold and shipped inside Canada, and compared like for like on what comes in the box.

Two zones at 9,000 BTU for bedrooms, roughly 360 to 450 sq ft each, and two at 12,000 BTU for living space, roughly 480 to 600 sq ft each.

Older houses, additions, attic conversions and finished basements rarely have duct where it is needed. Four zones from one outdoor unit avoids opening up ceilings.

This is a heat pump, not a cooling only air conditioner. It carries a 10 HSPF2 heating rating and a chassis electrical heater on the outdoor unit for cold weather.

What we stand behind

• Ships from our United States warehouse, free shipping over $150, and 14 day returns unused in the original packaging.
• 14 day returns on unused items in original condition and packaging
• Covered by the manufacturer's own warranty for material and manufacturing defects
• Line sets, communication wire and a controller for every one of the four zones are in the box

How much space will each indoor unit cover?

Sizing runs off the heat load of the room, not just its floor area, and Natural Resources Canada points to CSA F280-12 for the real calculation. As a rough check, 20 to 25 BTU per square foot is the usual rule of thumb. On that basis a 9,000 BTU unit suits roughly 360 to 450 sq ft and a 12,000 BTU unit suits roughly 480 to 600 sq ft. Poor insulation, large west facing windows or a 9 ft ceiling all push the figure up.

The four indoor units add up to 42,000 BTU but the outdoor unit is 35,000 BTU. Is that a mistake?

No. On any multi zone system the indoor ratings are not meant to be added together, and multi zone sizing guides say so plainly. The 35,000 BTU figure is what the outdoor unit can deliver at one time, shared among whichever zones are calling for it. Four rooms rarely peak at the same moment, which is why this combination is offered.

How cold can it get outside before it stops heating?

The manufacturer rates low ambient heating down to -25°C (-13°F), helped by an electric heater in the outdoor chassis. Natural Resources Canada notes that air source heat pumps lose capacity and efficiency as it gets colder, with typical COPs falling from 2.0 to 5.4 at 8°C to 1.1 to 3.7 at -8°C, and that most newer units have a minimum operating temperature between -15°C and -25°C. Keep a backup heat source for the coldest stretches.

Can I install this myself in Canada, and does it run on a normal outlet?

No on both counts. The outdoor unit runs on 208-230V 60Hz, so it needs its own branch circuit and an electrician, not a wall socket. Refrigerant work is also regulated: Ontario, for example, states that only a certified technician may remove, discharge, handle and dispose of refrigerants including HFCs, and that mechanical work on refrigeration equipment needs a Certificate of Qualification on top of that. Other provinces have their own halocarbon rules, and the federal Code of Practice says the same thing in plainer terms.