5MXTH40AVJU9
Daikin 40,000 BTU 3.5 Ton
Multi-Zone
Cold Climate
Ductless Heat Pump
The 5MXTH40AVJU9 is a Daikin cold-climate multi-zone outdoor heat pump designed to connect to up to five indoor units. It’s inverter-driven, uses R-32 refrigerant, and is typically chosen specifically because it can be built into a rebate-qualifying cold-climate ductless setup when matched properly.
This is the “max flexibility” option when you truly need five separate comfort zones — common in larger homes where bedrooms, living areas, basements, and bonus rooms all behave differently. It’s also a clean way to avoid multiple outdoor units while still giving room-by-room control indoors.
With five zones, we stay disciplined: we don’t oversize indoor units “just in case,” we keep the indoor mix intentional, and we plan piping/layout for long-term reliability and serviceability. Done right, it’s stable and comfortable; done sloppy, it can feel like it’s always juggling.
We confirm sizing and pricing on site – no pressure, no upsells.
Installed in Ottawa and surrounding areas by Peak Comfort HVAC
Specs for the 5MXTH40AVJU9
- - System type: Cold-climate multi-zone outdoor heat pump (MXTH)
- - Zones supported: Up to 5 indoor units
- - Power supply: 1φ, 208–230V, 60Hz
- - Efficiency (published): 20.0 SEER2 / 11.7 EER2 / 9.5 HSPF2
- - COP @ 5°F (-15°C) (heating): 1.9
- - Refrigerant: R-32
- - Factory refrigerant charge: 6.94 lb (3.15 kg)
- - Sound pressure level: 55 dB(A) cooling / 57 dB(A) heating
- - Outdoor dimensions (H×W×D): 34-1/4" × 43-5/16" × 18-1/8"
- - Weight: 221 lb
- - Piping connections (liquid): 1/4" × 5
- - Piping connections (gas): 3/8" × 1 + 1/2" × 2 + 5/8" × 2
- - Max interunit piping length: 262 ft (total) / 98 ft (one room)
- - Max installation height difference: 49-1/4 ft (between outdoor & indoor) / 24-5/8 ft (between indoor units)
- - Additional charge (if required): 0.22 oz/ft (20 g/m) (131-1/4 ft (40 m) or more)
- - AHRI reference #: TBD
Technical documents
Key features of the MXTH Multi Zone Heat Pump
- Key features of Daikin Cold Climate Multi-Zone (MXTH)
- Cold-climate multi-zone platform: chosen for stronger winter performance potential than “standard type” multi-zone.
- Rebate-qualifying potential: these cold-climate outdoor units are commonly used in rebate-eligible ductless designs (final eligibility depends on the matched indoor units and program rules).
- One outdoor unit, multiple zones: supports up to 2 / 3 / 4 / 5 indoor units depending on the model.
- Independent room control: each indoor unit has its own thermostat/control for real zone-by-zone comfort.
- Cleaner exterior footprint: fewer outdoor units compared to running multiple single-zone systems.
- Flexible indoor unit choices: can be paired with wall mounts, floor consoles, ceiling cassettes, and slim-duct options (model match rules apply).
- Shared-capacity reality (important): total outdoor capacity is shared — when multiple zones call hard at once, the system allocates output.
- Design + commissioning matter: indoor unit sizing, head selection, line lengths, height differences, and clean startup checks are what make multi-zone feel stable and “set it and forget it.”
- Peak Comfort install standard: correct design, tidy piping, proper pressure test + evacuation, and start-up verification with real measurements — no guesswork, no upsells.
Want to see if this ductless is the right fit?
Book a no-pressure ductless estimate. We’ll confirm layout, placement, and sizing - then give you clear options and pricing.
Get in Touch
Office Address:
275 Montfort St, Ottawa
ON K1L 5N8
Servicing: Ottawa, Orleans, Nepean, And the surrounding areas
Phone:
E-Mail:
info@peakcomfort.ca
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Email: info@peakcomfort.ca
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