The last HVAC Company we used for maintenance services was a hard seller and very annoying. They were always trying to upsell us on a new energy efficient furnace and air purification system. I could not handle their desperation for sales so we decided to look for a new company to deal with. After reading some great reviews, I contacted Waterloo Energy. We needed our spring service done on our HVAC unit; we hired them for a trial run. They came out the next day and I was very impressed with them. I will say that they offer a five star service at a reasonable price. You always get what you pay for. The thing we liked best is they did not try to sell us on their first visit. The technician was knowledgeable, dependable, polite and kept us informed of everything. Highly recommended!