Rinnai CIN035RFMB 3.5kW Compact Inverter Ceiling Cassette Indoor Unit
Trade pricing available — apply or sign in for your trade rate
Retail prices include VAT.
The Rinnai CIN035RFMB 3.5kW Compact Cassette is a slimline, recessed indoor unit designed specifically to fit standard 600x600mm ceiling tile apertures. Ideal for meeting rooms, modern residential kitchens, and boutique retail areas, it offers 360-degree balanced airflow to ensure comfortable temperatures without disruptive direct draughts. Designed to operate within a multi-split setup, this multi-room head features integrated Wi-Fi connectivity, allowing total control through mobile apps and seamless synchronisation with Google Home and Amazon Alexa smart setups. Quiet operation is achieved via aerodynamic fan blades, while reverse-cycle heat pump functionality provides reliable warming through winter and responsive cooling during hot spells. A built-in condensate lift pump makes routeing drainage hassle-free in low-ceiling cavities.
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.
- Free UK mainland delivery on in-stock units
- Manufacturer warranty included
- 14-day returns
Full Specifications
Description
The Rinnai CIN035RFMB 3.5kW Compact Cassette is a slimline, recessed indoor unit designed specifically to fit standard 600x600mm ceiling tile apertures. Ideal for meeting rooms, modern residential kitchens, and boutique retail areas, it offers 360-degree balanced airflow to ensure comfortable temperatures without disruptive direct draughts. Designed to operate within a multi-split setup, this multi-room head features integrated Wi-Fi connectivity, allowing total control through mobile apps and seamless synchronisation with Google Home and Amazon Alexa smart setups. Quiet operation is achieved via aerodynamic fan blades, while reverse-cycle heat pump functionality provides reliable warming through winter and responsive cooling during hot spells. A built-in condensate lift pump makes routeing drainage hassle-free in low-ceiling cavities.
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
£807
This AC / season
£269
You save / season
£538
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 996 kWh | £269 | Up to 300% | |
| Plug-in electric heater | 2989 kWh | £807 | 100% | |
| Electric storage heater | 2989 kWh | £807 | 100% |
Heat output estimated from this unit's 13,600 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 →