- Heated stair mats called Residential HeatTrak Walkway or Stair Mats are available. - The mats can be used independently or connected to other mats. - Up to 14 amps of mats can be connected together. - A Power Unit needs to be purchased separately. - The Power Unit connects the mats to an outdoor 120V electrical outlet. - The mats are designed to melt snow by gently warming them.