Ventomax Automatic Roof Vent Opener Toughened Glass taking up very little floor

taking up very little floor space (in fact the space of just three seed trays)

Control of the temperature is achieved with the 2nd dial

Temperature control in a greenhouse is vitally important to good growing

Capable of heating greenhouses up to 8x14 in size and keeping a greenhouse up to 12x20 frost free

as well as 3 heating intensities and a separate dial for temperature control - with each number increment relating to around 2

Ventomax Automatic Roof Vent Opener Toughened Glass taking up very little floorThis reliable and effective automatic opener will open and close your greenhouse roof vent far better than you could ever achieve manually. This model is not designed to be removed during the winter months although it is still possible with a little work.