Grow Room & Greenhouse Heaters

Cold nights and lights-off periods can drop temperatures fast, especially in garages, lofts and outbuildings in winter. A heater keeps your grow space or greenhouse stable so plants keep growing instead of stalling. We stock electric fan heaters, oil-filled radiators and a thermostat controller to automate them.

How to choose a grow room heater

Fan heater or oil-filled radiator? Fan heaters warm a space quickly and move air while they do it. The Grow Gadgets 2kW Greenhouse Heater has adjustable heat settings and a built-in thermostat. The 3kW version offers fan-only, half-power and full-heat modes for medium to larger spaces. Oil-filled radiators give gentle, silent convection heat with no fan and do not dry the air out. The 1000W oil-filled radiator suits small to medium tents and rooms, and the 2000W model gives more output for bigger spaces.

Size it to the space. As a general rule of thumb, a 1kW radiator is usually enough for a single tent in an insulated room. Unheated garages, outbuildings and greenhouses often need 2kW or more. If you are unsure, start smaller and add a thermostat. It is easier to control a modest heater than an oversized one.

Control it. The Grow Gadgets Thermostat Controller (£24.99) switches heaters, fans or heat mats on and off automatically. It covers -9°C to 50°C, handles loads up to 6,000W and has a detachable probe you can place at plant height.

Always keep heaters clear of tent walls, ducting and water, and follow the manufacturer's safety instructions.

Why buy from Black Country Systems

We are a family-run hydroponics shop at Unit 2 Black Lake, West Bromwich, trading for over 10 years. You get free UK delivery on orders over £94.99, we price match, and you can come into the shop for advice from people who use this kit. Call 0121 553 7872 or message us on WhatsApp.

Heater FAQs

When do I need a heater in a grow tent?

Usually during lights-off in colder months, when the heat from the light is gone. A hygrometer with a probe shows you how far the temperature drops overnight.

Can I use these in a greenhouse?

Yes. The 2kW and 3kW fan heaters are designed for greenhouses, sheds and grow rooms.

Do I need a thermostat if the heater has one?

A separate controller with a probe reads the temperature where your plants are, not at the heater, which gives steadier results.