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Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette
Mitsubishi Electric

Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette

In StockEnergy A++

Available to order — dispatched on the lead time shown below.

£1,462.69£1,700.00Save £237.31

Trade pricing available — apply or sign in for your trade rate

Dispatched in 2-3 working days
UK-Wide Delivery
Free UK mainland delivery on in-stock units
🇪🇺 EU Delivery available
Dispatched in 3–7 working days, then 5–10 working days EU transit
Orders under €150 ship VAT-paid at checkout (IOSS, no charges on delivery). Orders of €150 or more ship DDU — import VAT and customs duty are collected by the courier on delivery.

Retail prices include VAT.

Designed to fit standard 600 x 600mm European suspended ceiling grids, the Mitsubishi Electric SLZ-M35FA compact 4-way ceiling cassette delivers unobtrusive climate control with leading Japanese engineering. Supplying 3.5kW (12,000 BTU) of cooling alongside 4.0kW of high-efficiency heat pump warming, this unit is ideal for home extensions, contemporary open-plan kitchens, light commercial offices, and treatment rooms up to 35m². The unit offers independent 4-way vane direction to eliminate cold drafts and hot spots, whilst whisper-quiet operation as low as 25 dB(A) ensures minimal disruption. Featuring compatibility with Mitsubishi Electric's optional MELCloud Wi-Fi adapter (MAC-587IF-E), you can monitor room conditions and integrate scheduling directly with voice control via Amazon Alexa or Google Assistant. With an outstanding A++ seasonal energy rating and modern R32 refrigerant, it provides an eco-conscious, low-running-cost solution for year-round indoor comfort.

1

Need it installed?

We'll match you with a local HVAC engineer.

Smart-home ready

Connects natively with the systems below — control by app or voice.

Amazon AlexaGoogle Home
  • Free UK mainland delivery on in-stock units
  • Manufacturer warranty included
  • 14-day returns

Cooling Capacity

12,000 BTU

Energy Rating

A++

Recommended Room

Up to 35m²

Technical documents & videos

More from Mitsubishi Electric →
All Mitsubishi Electric catalogues and rangesMissing a document? Ask our team and we will send it over.

Full Specifications

Cooling Capacity12,000 BTU
Recommended Room SizeUp to 35m²
Energy RatingA++
Smart HomeAmazon Alexa, Google Home
Noise Level—
CategoryCeiling Cassettes
SKUSLZ-M35FA-SET

Physical dimensions

Exact dimensions for this model are being confirmed with Mitsubishi Electric — ask us and we will send the cut sheet with mounting and clearance figures.

Description

Designed to fit standard 600 x 600mm European suspended ceiling grids, the Mitsubishi Electric SLZ-M35FA compact 4-way ceiling cassette delivers unobtrusive climate control with leading Japanese engineering. Supplying 3.5kW (12,000 BTU) of cooling alongside 4.0kW of high-efficiency heat pump warming, this unit is ideal for home extensions, contemporary open-plan kitchens, light commercial offices, and treatment rooms up to 35m². The unit offers independent 4-way vane direction to eliminate cold drafts and hot spots, whilst whisper-quiet operation as low as 25 dB(A) ensures minimal disruption. Featuring compatibility with Mitsubishi Electric's optional MELCloud Wi-Fi adapter (MAC-587IF-E), you can monitor room conditions and integrate scheduling directly with voice control via Amazon Alexa or Google Assistant. With an outstanding A++ seasonal energy rating and modern R32 refrigerant, it provides an eco-conscious, low-running-cost solution for year-round indoor comfort.

Compare similar units

Side-by-side specs for other ceiling cassettes in a similar BTU range.

This Unit
Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette

Mitsubishi Electric

Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette

Samsung WindFree 4-Way Mini Cassette 3.5kW

Samsung

Samsung WindFree 4-Way Mini Cassette 3.5kW

LG 3.5kW 1-Way Ceiling Cassette System

LG

LG 3.5kW 1-Way Ceiling Cassette System

Daikin FDXM35F3 Concealed Ceiling Unit

Daikin

Daikin FDXM35F3 Concealed Ceiling Unit

Cooling Capacity
12,000 BTU
12,000 BTU
12,000 BTU
12,000 BTU
Room Size
Up to 35m²
Up to 35m²
Up to 35m²
Up to 35m²
Energy Rating
A++
A++
A+
A+
Heating Capable
Yes (heat pump)
Yes (heat pump)
Yes (heat pump)
Yes (heat pump)
Smart Home
Amazon Alexa, Google Home
Samsung SmartThings
Google Home, Amazon Alexa
Amazon Alexa, Google Home
Stock
In Stock
In Stock
In Stock
In Stock
Price inc VAT
£1,462.69
£1,455.00
£1,408.99
£1,575.00

Common questions about the Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette

How many BTU is the Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette?

The Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette has a cooling capacity of 12,000 BTU, suitable for Up to 35m².

What room size is the Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette suitable for?

The Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette is recommended for rooms Up to 35m².

Can I install the Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette myself?

No — this unit requires professional installation by a qualified F-gas engineer. Use our Find an Installer service to get matched with a local HVAC professional.

Is the Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette smart-home compatible?

Yes — the Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette supports Amazon Alexa, Google Home for app and voice control.

How long does delivery of the Mitsubishi Electric SLZ-M35FA 3.5kW Compact 4-Way Ceiling Cassette take?

This unit is dispatched in 2-3 working days. Delivery is then 1–2 working days to most UK mainland addresses, and 3–6 working days into the EU.

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Annual energy savings estimate

How much this A++-rated unit could save versus a standard C-rated model, based on your usage.

This unit

97 kWh/yr

EER 13

Standard model

158 kWh/yr

EER 8

Est. saving

£16.44

61 kWh/yr less

Estimate based on the unit's energy-rating efficiency factor and cooling capacity (12,000 BTU). Actual savings vary with room size, climate and usage patterns.

Winter heating cost: this AC vs electric heaters

This unit reverses to heat your room in winter. Based on its 4 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.

Electric heater / season

£810

This AC / season

£270

You save / season

£540

~67% less electricity

Heating methodElectricity / seasonCost / seasonEfficiencySummer cooling
This heat-pump AC1000 kWh£270Up to 300%
Plug-in electric heater3000 kWh£810100%
Electric storage heater3000 kWh£810100%

Heat output estimated from this unit's 13,650 BTU/hr rating. A heat pump moves heat (COP ≈ 3), so it uses about a third of the electricity of a direct-electric heater for the same warmth. Actual savings vary with room size, insulation, tariff and usage. See the full comparison →

Share your savings

This heat-pump AC costs only £270/season to heat a room vs £810 for an electric heater - that's £540 saved. https://stockool.store/products/mitsubishi-electric-slz-m35fa-3-5kw-compact-ceiling-cassette

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