{"product_id":"g-a-s-day-night-temperature-controller","title":"G.A.S. Day \u0026 Night Temperature Controller","description":"\u003csection class=\"gh-product-listing\"\u003e\n\u003ch2\u003eG.A.S. Day \u0026amp; Night Temperature Controller — Light-Triggered Heater Control for Grow Rooms\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e Growers running LED lights who need separate day and night temperature settings without buying a full environmental control system\u003c\/p\u003e\n\u003cdiv aria-label=\"Our thoughts\" role=\"note\" class=\"gh-our-thoughts\"\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eOur thoughts\u003c\/strong\u003e\u003cbr\u003eThis does one job properly: switching your heater on and off based on whether your lights are on or off. If you're growing with LEDs and want to dial in different temperatures for day and night cycles, this is a solid entry-level solution that won't overcharge you for features you don't need.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe G.A.S. Day \u0026amp; Night Temperature Controller is a \u003cstrong\u003edual-dial heater thermostat\u003c\/strong\u003e designed to automate temperature management across your lights-on and lights-off cycles. It uses an integrated light sensor in the probe to detect when your lights switch, then automatically adjusts between two temperature set points you've chosen. Simple, effective, and built to work with heaters up to 2KW — which covers most home growing setups. This is the straightforward alternative to buying a multi-function environmental controller when all you need is temperature control.\u003c\/p\u003e\n\u003ch3\u003eHow it compares\u003c\/h3\u003e\n\u003cp\u003eThis sits at the \u003cstrong\u003ebudget end of temperature controllers\u003c\/strong\u003e, but doesn't compromise on the essentials.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCosts a fraction of full-spec environmental control systems\u003c\/li\u003e\n\u003cli\u003eDoes exactly what it advertises — day\/night temperature switching, nothing more\u003c\/li\u003e\n\u003cli\u003eLight-triggered automation means no manual dial-spinning when your lights come on\u003c\/li\u003e\n\u003cli\u003eCompatible with any heater up to 2KW, so works with kit you probably already own\u003c\/li\u003e\n\u003cli\u003eNo digital display means fewer things to break and easier to read at a glance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you need cooling or multi-function control, this isn't your device. But for heating automation with day\/night logic, you're looking at solid value here.\u003c\/p\u003e\n\u003ch3\u003eUsage guidance\u003c\/h3\u003e\n\u003cp\u003eThe G.A.S. controller works in a straightforward way:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003cbr\u003eMount the controller near your heater. Position the sensor probe in the middle of your room where air is moving freely — this keeps readings accurate and prevents hot spots. A 4-metre cable gives you decent placement flexibility. Run your heater's power cable through the controller outlet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSetting temperatures\u003c\/strong\u003e\u003cbr\u003eLeft dial controls day temperature (lights on). Right dial controls night temperature (lights off). Dial clockwise to increase, anti-clockwise to decrease. The sensor automatically switches between the two as your lights turn on and off.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow it works in practice\u003c\/strong\u003e\u003cbr\u003eWhen your lights come on, the controller reads the light sensor and switches to your daytime set point. Your heater runs until the room hits that temperature, then cycles on and off to maintain it. When lights go off, the controller automatically switches to your night set point — usually lower to save energy and reflect natural temperature drops.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy day\/night matters\u003c\/strong\u003e\u003cbr\u003ePlants respond differently to temperature based on light availability. Running a warmer day temperature and cooler night temperature isn't just energy-efficient — it helps control plant shape and structure without chemicals. It's called DIF, and it genuinely works.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant limitation\u003c\/strong\u003e\u003cbr\u003eThis controller only adds heat. It cannot cool if the room gets too hot. If temperature control in the summer is a concern, you'll need a separate cooling controller.\u003c\/p\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMax heater power: \u003cstrong\u003e2000W (2KW)\u003c\/strong\u003e — do not exceed this or you'll damage the unit\u003c\/li\u003e\n\u003cli\u003eTemperature probe: \u003cstrong\u003eIntegrated light sensor with 4-metre cable\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eProbe placement: \u003cstrong\u003eBest suited to middle of room with air circulation\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eControl method: \u003cstrong\u003eTwo ergonomic dials — one for day, one for night\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOperational feedback: \u003cstrong\u003eGreen LED indicates heater is on; rapid flashing indicates sensor fault\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSensor replacement: \u003cstrong\u003eUser-replaceable probe (available separately)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFunction: \u003cstrong\u003eHeating only — cannot cool\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompatibility: \u003cstrong\u003eWorks with any heater up to 2KW\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho this is for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLED growers who need to automate the day\/night temperature swing their lights create\u003c\/li\u003e\n\u003cli\u003eNew growers looking for their first piece of automation without complexity\u003c\/li\u003e\n\u003cli\u003eBudget-conscious growers who want temperature control without multi-function controller pricing\u003c\/li\u003e\n\u003cli\u003eGrowers with small to medium rooms where a 2KW heater is sufficient\u003c\/li\u003e\n\u003cli\u003eAnyone running a single heater who wants to cut energy waste by dropping night temperatures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNot suitable for growers who need cooling, multi-function monitoring, or have heaters over 2KW.\u003c\/p\u003e\n\u003ch3\u003eOur take\u003c\/h3\u003e\n\u003cp\u003eThis is a solid entry-level heater controller that actually understands how LED growing works. The light-triggered day\/night switching is proper automation — no guessing, no manual adjustment, just plug it in and let the sensor handle it. Build quality is decent, and it does exactly what a 2KW heater controller should do without overcomplicating things.\u003c\/p\u003e\n\u003cp\u003eIf you're running an LED setup and currently nursing your heater dial through the day, this is worth picking up.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"GAS UK","offers":[{"title":"Default Title","offer_id":47916429312170,"sku":"500027","price":89.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0053\/5540\/5400\/files\/500027-Heater_b297b694-f4eb-4d79-9e68-1cd0b13c0dc6.jpg?v=1769193341","url":"https:\/\/growershouse.co.uk\/products\/g-a-s-day-night-temperature-controller","provider":"Growers House ","version":"1.0","type":"link"}