The Heatmiser RF-Switch v2 is a surface-mount two-channel wireless receiver that pairs with Heatmiser RF thermostats to independently control two heating zones and one hot water zone from one compact wall box. Each channel provides a volt-free relay output suitable for motorised zone valves or direct boiler enable, replacing a wired programmer in most S-plan or Y-plan systems. It runs on licence-free 868 MHz wireless with up to 100 m open-air range and speaks directly to the Slimline-RF v3, neoAir v3 and the UH8-RF v2 wiring centre — so the same receiver works as a wireless boiler-enable link for an underfloor manifold or as a standalone programmer for a radiator system. LED status indicators and per-channel manual override buttons simplify commissioning and fault-finding. 2 Heating Zones 1 Hot Water Zone 868 MHz RF Volt-Free Outputs UH8-RF v2 Compatible Surface Mount 3 SWITCHED CHANNELS 868MHz RF FREQUENCY 100m OPEN-AIR RANGE 3A PER RELAY (RES.) 230V AC SUPPLY Professional installation required. Mains-powered 230 V AC device — must be wired by a qualified electrician in accordance with BS 7671. Always isolate the supply before removing the cover. Compatibility note. Pairs with Slimline-RF v3, neoAir v3, UH8-RF v2 and the Heatmiser Boost repeater. Not compatible with older v1 RF thermostats — check your thermostat revision before ordering. Typical application. Pair with a Slimline-RF v3 per heating zone plus a cylinder stat to create a fully wireless S-plan programmer — ideal for retrofits where running new cable to the airing cupboard is impractical. Key Features Two Heating Zones Plus Hot Water Three independent volt-free outputs — CH1, CH2 and HW — run two heating circuits and the cylinder from one wall box, replacing multiple single-channel receivers. Reliable 868 MHz Wireless The licence-free 868 MHz sub-GHz band penetrates walls better than 2.4 GHz Wi-Fi devices, reaching up to 100 m in open air. Extend further with the Heatmiser Boost repeater. Wireless Boiler Enable Pair with a UH8-RF v2 wiring centre for a wireless boiler-enable link — no long cable run from a remote manifold back to the boiler house. Volt-Free Dry Contacts Each relay output is genuinely volt-free, switching almost any modern combi, system or heat-only boiler, zone valve or low-voltage control input without polarity concerns. Manual Override & LED Status Front-panel override buttons force any channel on for commissioning or flat-battery diagnostics, while power, CH1, CH2 and HW LEDs show live status at a glance. Compact Surface Mount A slim 108 × 90 × 24 mm enclosure mounts flat to any wall near the boiler or wiring centre — no DIN rail or deep back-box required. Weighs just 166 g. Technical Specifications Model RF-Switch v2 Manufacturer IMI Heatmiser (Heatmiser UK Ltd) Heating zones 2 Hot water zones 1 Output type Volt-free relay × 3 channels Relay load — max 3 A resistive per channel Total load — max 9 A resistive Mains supply 230 V AC, 50 Hz, 1-phase RF frequency 868 MHz (licence-free) Wireless range Up to 100 m open-air Compatible thermostats Slimline-RF v3, neoAir v3, neoPlug (RF) Wiring-centre pairing UH8-RF / UH8-RF v2 Range extender Heatmiser Boost compatible Status indication LED: Power, CH1, CH2, HW Manual override Per-channel override buttons Mounting Surface mount (not DIN) IP rating IP20 Dimensions (L × H × D) 108 × 90 × 24 mm Weight 166 g Warranty 2 years manufacturer Frequently Asked Questions Which thermostats does it pair with? Current-generation Heatmiser RF thermostats — specifically the Slimline-RF v3 and neoAir v3 (white, black and platinum). Each of the three channels (CH1, CH2, HW) can be paired to its own thermostat. It is not compatible with older v1 RF thermostats or neoStat-e electric thermostats. Can it replace a wired heating programmer? Yes. In a typical S-plan system the RF-Switch v2 sits next to the boiler wiring centre and switches the heating and hot water zone valves via its volt-free relays, while paired wireless thermostats handle scheduling. This removes the need for a wall-mounted programmer and avoids pulling new cable to a central point — ideal for retrofits. How does it work with the UH8-RF v2? Pairing an RF-Switch v2 to a UH8-RF v2 underfloor wiring centre creates a wireless boiler-enable link: when any zone on the UH8-RF v2 calls for heat, the RF-Switch closes its boiler relay to fire the boiler and pump. Pair by holding the Boiler button on the RF-Switch for 5 seconds, then pressing the pair button on the UH8-RF v2. Does it need Wi-Fi or an app? No. The RF-Switch v2 is a pure RF receiver — it talks directly to paired Heatmiser thermostats on 868 MHz and does not connect to your home Wi-Fi. For app and voice control, pair it with neoAir v3 thermostats and a neoHub for the full Heatmiser neo smart-home experience. Build Your Heatmiser Wireless System Pair the RF-Switch v2 with the Slimline-RF v3, neoAir v3 smart thermostat, UH8-RF v2 wiring centre or the Boost RF repeater — all available at Aizo Quality Heating.
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