{"product_id":"engo-e40-batw-battery-powered-zigbee-smart-thermostat-white","title":"ENGO E40-BATW Battery Powered ZigBee Smart Thermostat - White","description":"\u003c!-- SEO Product Name: ENGO E40-BATW Battery Powered ZigBee Smart Thermostat - White --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; line-height:1.6; color:#1A1A1A; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp\u003e\u003cstrong\u003eENGO E40-BATW\u003c\/strong\u003e is a \u003cstrong\u003ebattery-powered ZigBee 3.0 \/ 868MHz smart thermostat\u003c\/strong\u003e, designed as a wireless, surface-mounted successor to ENGO's E25 range. Because it runs on batteries rather than a mains connection, it can be fitted to a wall without chasing in cable or breaking into the existing electrical circuit, making it well suited to retrofits and radiator upgrades where running a new mains feed isn't practical. It communicates with ENGO receivers, relays, control modules, and \u003cstrong\u003eelectronic radiator valve heads\u003c\/strong\u003e over the 868MHz radio band, and can control up to \u003cstrong\u003esix radiator valves from a single thermostat\u003c\/strong\u003e for even heat distribution across a larger room. Available in white.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:10px; margin:24px 0;\"\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:16px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-weight:700; line-height:1.2; font-size:20px;\"\u003e2x AA\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.95;\"\u003eBattery power\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:16px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-weight:700; line-height:1.2; font-size:20px;\"\u003eZigBee 3.0\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.95;\"\u003e868MHz radio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:16px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-weight:700; line-height:1.2; font-size:20px;\"\u003e5-45°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.95;\"\u003eSetpoint range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:16px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-weight:700; line-height:1.2; font-size:20px;\"\u003e±0.5°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.95;\"\u003eDisplay accuracy\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:16px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-weight:700; line-height:1.2; font-size:20px;\"\u003eUp to 6\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.95;\"\u003eRadiator valves controlled\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#FFFFFF; border-radius:8px; padding:16px 10px; text-align:center;\"\u003e\n\u003cdiv style=\"font-weight:700; line-height:1.2; font-size:20px;\"\u003e80x80x23mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; margin-top:4px; opacity:0.95;\"\u003eDimensions\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:4px solid #B9770E; background:#FEF5E7; padding:14px 16px; margin:18px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#B9770E; margin-bottom:4px;\"\u003eBattery specification discrepancy\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; line-height:1.5;\"\u003eENGO's own product listing gives two different battery specifications for this thermostat: the technical data table states \u003cstrong\u003e2x AA\u003c\/strong\u003e batteries, while the accompanying installer benefits text states \u003cstrong\u003e2x AAA\u003c\/strong\u003e. We have used the technical data table (2x AA) as the authoritative figure on this page, but recommend confirming battery type against the physical unit or quick guide before ordering spares.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:4px solid #C0392B; background:#FDEDEC; padding:14px 16px; margin:18px 0; border-radius:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#C0392B; margin-bottom:4px;\"\u003eZigBee gateway required for app control\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; line-height:1.5;\"\u003eFull remote scheduling and app control via ENGO Smart requires a compatible \u003cstrong\u003eZigBee gateway\u003c\/strong\u003e, purchased separately. Without a gateway, the thermostat still operates fully via its own display and ENGO binding function, but cannot be controlled remotely or via voice assistants.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-weight:700; font-size:18px; color:#008377CF; margin:32px 0 12px 0;\"\u003eKey Features\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:12px; margin:20px 0;\"\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; flex:1; min-width:220px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eBattery power means no mains wiring\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.5;\"\u003eFitting the thermostat is a case of mounting the backplate and inserting batteries; there's no need to run a new cable back to a fused spur or existing circuit, which keeps installation quick on retrofit and radiator-upgrade jobs.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; flex:1; min-width:220px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eControls up to six radiator valves from one thermostat\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.5;\"\u003eA single E40-BAT can command up to \u003cstrong\u003esix electronic radiator valve heads\u003c\/strong\u003e over the 868MHz link, so one thermostat can manage every radiator in a larger room or open-plan space rather than needing a valve-mounted controller per radiator.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; flex:1; min-width:220px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eENGO binding keeps the system working offline\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.5;\"\u003eThe ENGO binding function pairs the thermostat directly with receivers, relays, and valve heads without relying on cloud automation, so the heating schedule continues to run even if the internet connection or gateway is temporarily unavailable.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; flex:1; min-width:220px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eTPI and adjustable hysteresis control\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.5;\"\u003ePrecise temperature holding is handled by a \u003cstrong\u003eTPI algorithm\u003c\/strong\u003e, with adjustable hysteresis from ±0.2°C to ±2.0°C for installers who need to tune response for a particular room or heat-emitter type.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; flex:1; min-width:220px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003ePIN-protected key lock for shared or public spaces\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.5;\"\u003eSettings can be locked with a PIN code, preventing accidental or unauthorised changes to the setpoint in households with children or in commercial spaces such as offices and communal areas.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#F7FBFA; border:1px solid #E0EDEB; border-radius:8px; padding:16px; flex:1; min-width:220px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px;\"\u003eContinues to run through mains power cuts\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; line-height:1.5;\"\u003eBecause the thermostat itself is battery-powered, it keeps displaying and applying its schedule during a mains power outage, even if the boiler or heat source it's controlling cannot run.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-weight:700; font-size:18px; color:#008377CF; margin:32px 0 12px 0;\"\u003eTechnical Specification\u003c\/p\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; margin:20px 0; font-size:14px;\"\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:8px 12px; font-size:14px;\"\u003ePower\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB; font-weight:700; width:45%;\"\u003ePower supply\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB;\"\u003e2x AA batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:8px 12px; font-size:14px;\"\u003eTemperature Control\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB; font-weight:700; width:45%;\"\u003eSetpoint range\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB;\"\u003e5.0°C to 45.0°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB; font-weight:700; width:45%;\"\u003eDisplay accuracy\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB;\"\u003e0.5°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB; font-weight:700; width:45%;\"\u003eControl algorithm\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB;\"\u003eTPI, hysteresis (±0.2°C to ±2°C), Delta RCWC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:8px 12px; font-size:14px;\"\u003eConnectivity\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB; font-weight:700; width:45%;\"\u003eCommunication\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB;\"\u003eZigBee 3.0, Radio 868MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB; font-weight:700; width:45%;\"\u003eRadiator valve support\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB;\"\u003eUp to 6 electronic radiator valve heads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB; font-weight:700; width:45%;\"\u003eApp platform\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB;\"\u003eENGO Smart (ZigBee gateway required for remote\/app control)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:8px 12px; font-size:14px;\"\u003ePhysical\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB; font-weight:700; width:45%;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB;\"\u003e80 x 80 x 23mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFFFFF;\"\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB; font-weight:700; width:45%;\"\u003eMounting\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB;\"\u003eSurface-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#F7FBFA;\"\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB; font-weight:700; width:45%;\"\u003eColour\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #E0EDEB;\"\u003ewhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-weight:700; font-size:18px; color:#008377CF; margin:32px 0 12px 0;\"\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cdiv style=\"margin:20px 0;\"\u003e\n\u003cdetails style=\"margin-bottom:10px; border:1px solid #E0EDEB; border-radius:6px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:12px 16px; cursor:pointer; list-style:none;\"\u003eDo I need a gateway to use this thermostat?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14px; line-height:1.6;\"\u003eNo gateway is required for local, on-device operation and pairing with receivers or radiator valves via ENGO binding. A ZigBee gateway is required for remote scheduling, app control, and voice assistant integration.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:10px; border:1px solid #E0EDEB; border-radius:6px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:12px 16px; cursor:pointer; list-style:none;\"\u003eHow many radiator valves can one thermostat control?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14px; line-height:1.6;\"\u003eUp to six electronic radiator valve heads can be linked to a single E40-BAT thermostat, allowing one unit to manage every radiator in a room.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:10px; border:1px solid #E0EDEB; border-radius:6px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:12px 16px; cursor:pointer; list-style:none;\"\u003eWhat batteries does this thermostat use?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14px; line-height:1.6;\"\u003eENGO's technical specification lists 2x AA batteries; please see the amber note above regarding a discrepancy in the manufacturer's own documentation on this point.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:10px; border:1px solid #E0EDEB; border-radius:6px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:12px 16px; cursor:pointer; list-style:none;\"\u003eWill the heating schedule still run if I lose Wi-Fi or the gateway goes offline?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14px; line-height:1.6;\"\u003eYes. Schedules are stored on the thermostat and continue to run via ENGO binding without an active internet or gateway connection.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:10px; border:1px solid #E0EDEB; border-radius:6px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#FFFFFF; font-weight:700; padding:12px 16px; cursor:pointer; list-style:none;\"\u003eIs this thermostat suitable for underfloor heating as well as radiators?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; font-size:14px; line-height:1.6;\"\u003eYes, the E40-BAT is compatible with both underfloor heating and radiator heating systems when paired with the appropriate ENGO receiver or valve head.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ENGO Controls","offers":[{"title":"Default Title","offer_id":65244443574621,"sku":"E40-BATW","price":49.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/ENGOE40-BATWBatteryPoweredZigBeeSmartThermostat-White.jpg?v=1783954231","url":"https:\/\/qualityheating.co.uk\/products\/engo-e40-batw-battery-powered-zigbee-smart-thermostat-white","provider":"AIZO Quality Heating","version":"1.0","type":"link"}