Mitsubishi Electric · Heat Pump

Mitsubishi FX (Hyper-Heat)

The Mitsubishi Electric FX (Hyper-Heat) is a ductless mini-split heat pump built for cold Ontario winters — it holds 100% of its rated heat down to -23°C and keeps running to -30°C. For Toronto homes without ductwork, or for rooms your furnace never quite reaches, it handles both heating and cooling from a single wall-mounted indoor head. Megacity HVAC installs it as a single-zone or multi-zone system.

29.9SEER2 ENERGY STAR®

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Mitsubishi Electric FX-Series Hyper-Heat ductless heat pump

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Why Toronto Homeowners Choose the Mitsubishi FX (Hyper-Heat)

True cold-climate performance: 100% rated heat at -23°C and operation down to -30°C, so it carries through the worst GTA cold snaps

High efficiency both ways — 29.9 SEER2 cooling (33.1 on the 9k model) and 12.4 HSPF2 heating means lower year-round energy use

Runs quiet, from 21 dB(A) — usable in bedrooms and offices where a window unit would be intrusive

Uses R-454B, a lower-GWP refrigerant, and is ENERGY STAR Certified; available single-zone or expanded to multi-zone for several rooms

A Good Fit If

Homes with no ductwork — older houses, additions, or condos where a central system isn't practical

Rooms your furnace struggles to heat or cool: finished basements, attic conversions, sunrooms, garages, home offices

Owners who want one quiet unit doing both heating and cooling instead of a window AC plus space heater

Anyone wanting a cold-climate heat pump that keeps full output through a Toronto deep freeze, not one that taps out at -15°C

Manufacturer Specs

Model: MUZ-FX12NLHZ + MSZ-FX12NL
Series: M-Series FX (Hyper-Heating H2i)
Cooling efficiency: 29.9 SEER2 (9k model: 33.1)
Heating efficiency: 12.4 HSPF2
Cold-climate: 100% heat at -23°C · operates to -30°C
Type: Variable-speed inverter (ductless)
Indoor sound: 21 – 42 dB(A)
Refrigerant: R-454B (low-GWP)
Capacity: 12,000 BTU/h · single-zone (multi-zone available)
Warranty: 10-year compressor & parts (with registration)
Certifications: ENERGY STAR® Certified

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Specs published by Mitsubishi Electric.

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Common Questions

Mitsubishi FX (Hyper-Heat) — FAQ

Will this actually keep my room warm through a Toronto winter?

Yes. The FX Hyper-Heat delivers 100% of its rated heat down to -23°C and continues operating to -30°C, which covers the coldest stretches we see in the GTA. Unlike basic heat pumps that lose most of their output below freezing, this one is engineered specifically for cold-climate heating.

How efficient is it, and what do those numbers mean?

It's rated at 29.9 SEER2 for cooling (33.1 on the 9,000 BTU model) and 12.4 HSPF2 for heating — both strong figures, and it's ENERGY STAR Certified. SEER2 measures cooling efficiency and HSPF2 measures heating efficiency over a season; higher is better on both. In plain terms, it moves a lot of heat per dollar of electricity.

Can it heat or cool more than one room?

The single-zone setup pairs one outdoor unit with one indoor head (the spec'd model is 12,000 BTU/h). Multi-zone configurations are available, letting one outdoor unit feed several indoor heads in different rooms. We'll size it to your space during the in-home visit — capacity needs to match the room, not just the square footage.

Are there rebates, and what's the warranty?

Heat pumps can qualify for current Ontario heat-pump rebates, which must be applied for through a program-registered contractor — ask us and we'll confirm what's available for your project before you commit. The FX carries a 10-year compressor and parts warranty when the unit is registered after install.