{"product_id":"kanopi-2000-3000w-ptc-greenhouse-heater-with-thermostat","title":"Kanopi 2000W PTC Heater with Digital Thermostat for Greenhouse, Garage and Workshop","description":"\u003ch2\u003eWhy greenhouses freeze overnight with the heater still running\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eA thermostat can't hold a number your heater can't reach.\u003c\/strong\u003e Here's how to keep your set point through the coldest night of your winter.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eIf your heater lost power, more watts won't help. This is for the nights it ran and still lost.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eA thermostat is a switch, not an engine\u003c\/h3\u003e\n\u003cp\u003eYour greenhouse leaks heat through every square foot of glass, and the colder it gets outside, the faster it leaks. Every heater has a top speed, so every heater has a ceiling: the most degrees it can lift your greenhouse above the outside air. On the coldest night, heat loss climbs past that ceiling. The heater runs flat out, the thermostat keeps it switched on, and there is nothing more to give. The fan blows. The setting still says 45°F. Nothing beeps.\u003c\/p\u003e\n\u003cp\u003eIt wasn't bad luck. Your heater was sized for an ordinary night, not the coldest one.\u003c\/p\u003e\n\n\u003ch3\u003eThe Reserve Hold\u003c\/h3\u003e\n\u003cp\u003eKanopi is sized for the coldest hour of your winter, then the thermostat holds it back for every other hour.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2000W of PTC heat.\u003c\/strong\u003e About 6,800 BTU\/hr, a third more than the roughly 5,100 BTU\/hr of a typical 1500W greenhouse heater.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital thermostat with a plant-height probe.\u003c\/strong\u003e It reads the air where your plants are, not at the heater. On mild nights it simply runs shorter cycles. The extra watts wait for the night that counts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteady warmth with no flame and no fuel.\u003c\/strong\u003e No tank to run dry before dawn, nothing to light, no wick to trim.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow many degrees does your heater give you? (on paper)\u003c\/h3\u003e\n\u003cp\u003eLowest outside temperature each heater can hold 45°F down to, by the standard heat-loss formula (single glazing U 1.2, twin-wall U 0.7, no sun or thermal mass; real greenhouses vary):\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eGreenhouse\u003c\/th\u003e\n\u003cth\u003eTypical 1500W\u003c\/th\u003e\n\u003cth\u003eKanopi 2000W\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6x8 single-glazed\u003c\/td\u003e\n\u003ctd\u003eabout 25°F\u003c\/td\u003e\n\u003ctd\u003eabout 18°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8x10 single-glazed\u003c\/td\u003e\n\u003ctd\u003eabout 31°F\u003c\/td\u003e\n\u003ctd\u003eabout 26°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8x12 single-glazed\u003c\/td\u003e\n\u003ctd\u003eabout 32°F\u003c\/td\u003e\n\u003ctd\u003eabout 28°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8x10 twin-wall\u003c\/td\u003e\n\u003ctd\u003eabout 20°F\u003c\/td\u003e\n\u003ctd\u003eabout 12°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8x12 twin-wall\u003c\/td\u003e\n\u003ctd\u003eabout 23°F\u003c\/td\u003e\n\u003ctd\u003eabout 16°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eSources: University of Arizona CEAC greenhouse heating guide; John Bartok Jr., UConn; US EIA (1W = 3.412 BTU\/hr).\u003c\/p\u003e\n\n\u003ch3\u003eNot just for the greenhouse\u003c\/h3\u003e\n\u003cp\u003eThe same heater keeps you warm all winter, wherever the cold gets in. Set the temperature you want on the digital thermostat and it holds it.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGarage and workshop.\u003c\/strong\u003e Take the chill off before you start work, and keep paint, glue and tools out of the freezing cold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShed, studio and home office.\u003c\/strong\u003e Steady warmth for the room you're actually in, without heating the whole house.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBasement, sunroom and spare room.\u003c\/strong\u003e Keep a cold room comfortable through the worst of winter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt has a carry handle and a tilting stand, so it goes where the cold is. No flame, no fumes, no fuel to refill.\u003c\/p\u003e\n\n\u003ch3\u003eHonest limits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eExtra watts don't fix a power cut, a tripped circuit or a heater left off. Keep your backup and your alarm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower requirement:\u003c\/strong\u003e a standard 120V household outlet supplies at most about 1,800W, so 2000W requires a dedicated 240V circuit, fitted by an electrician (many workshops already have one). Greenhouse, garage and outbuilding outlets should be GFCI protected.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eI already have a heater with a thermostat.\u003c\/strong\u003e Good. It holds until heat loss passes its ceiling. In a single-glazed 8x10 on an 18°F night, on paper, that's about 33°F inside at 1500W and about 37°F at 2000W.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use it outside the greenhouse?\u003c\/strong\u003e Yes. It's a portable 2000W heater with a digital thermostat, so it works in a garage, workshop, shed, basement or home office all winter long. The same power note applies: it needs a dedicated 240V circuit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill a bigger heater cost more to run?\u003c\/strong\u003e On mild nights it uses about the same energy holding the same number; it just runs shorter cycles. On the coldest nights it uses more, because it is actually holding your number.\u003c\/p\u003e","brand":"Kanopi","offers":[{"title":"Default Title","offer_id":49790917017755,"sku":null,"price":119.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0789\/0088\/7707\/files\/kanopi-heater-packshot.png?v=1791830336","url":"https:\/\/www.trykanopi.com\/products\/kanopi-2000-3000w-ptc-greenhouse-heater-with-thermostat","provider":"Kanopi","version":"1.0","type":"link"}