Envirolet® 120VAC Electric models use a maximum of 540W. 120VAC models have 2 x 20W Fans and 1 x 500W Heater.
The Fans should be operated all of the time when the System will be in use. For optimum performance, the Fans should also be running when the Envirolet™ will not be in use for any period up to 2 weeks, e.g., a weekend cottage. When the System is in Fans Only mode, the power consumption is 40W (2 Fans x 20W each).
The 500W Heater should be run when the System is going to be in use. (120VAC Systems that do not have the Heater running at all times when the system is in use should have a Drain Kit installed.) The Heater is thermostatically controlled and only operates approximately 25-30% of the time. Therefore, an Envirolet® 120VAC model will operate at a maximum of 540W about 6 hours a day.