Use these heat mats to keep plant material at proper temperature for good rooting and good plant growth. These mats provide even, constant heat to root zone for flats and pots. Designed for use on greenhouse benches or any flat surface, they are waterproof and fully grounded against electrical shock. All sizes come with a heavy-duty 8' cord and a molded NEMA three-prong plug for 120 volt AC current. For automated control, use with RHT-4 thermostat and bench plate, both sold separately.

Please Note: Output for 12" wide mats is 20 watts per linear foot. Output for 17" wide mats is 30 watts per linear foot. Output for 21" wide mats is 40 watts per linear foot. Mats used on GFI outlets must stay under 500 watts to avoid tripping GFI.