The DR-122X4 Large Size Bed bug Heater System is a high performance heating chamber with a quiet, multi-blade Turbo fan that can exterminate existing and potential bed bugs. This system is large enough to help deal with bed bug infested items such as: Sofas, Beds, Desks, Seats, Footwear, Books, Dressers, Night Stands, Clothes, Sheeting, Appliances, and much more. No Pesticides ! Just Heat ! When you're ready to start toasting the bed bugs here's a few things to note: The DR-122X4 takes approximately 10 minutes to assemble. Due to the size of the product, we recommend a minimum of 150 sq ft space for set up. This Bedbug Heater System requires a total of 50 Amps or 6,000 Watts to operate. Each heater needs to be plugged into a 120V outlet and each outlet needs to be on its own circuit. The four heaters may need to use four extension cords (not included in package). A typical residential and/or commercial building has one circuit per room. Do not use extension cords rated below 1500 watts or under 16 gauge.