We have used Weathermakers for several years for our furnace and HRV installation, maintenance and repairs. Every few months our 1.5 year old HRV would randomly shut itself down. After 3 attempts to solve the mystery, the Service Manager - Chad - came to our house to investigate a couple of theories. The solution involved some fine tuning of the original parts. He charged us nothing for his efforts. Thanks goes to the entire Weathermakers' crew!