Dual flow is a low-voltage low-power system. Fans are speed controlled, only running at 100% when needed. On average a system with 8 fans (typical installation) will consume around 10 units of power per month (10KWH).

If your power company charges you 25c per unit then the monthly cost is as low as $2.50.

This is a very low cost to run a system where the fans are operating 24Hrs per day. There is always fresh air introduced into your home, precisely controlled and low impact. Just enough to be effective, all that’s needed.