Our furnace hadn't been working properly when the temperature dropped below freezing. Our furnace was only a few years old and under warranty and we found Sunnyside on a list of ICP dealers. Harrison and Peter came out and troubleshooted what turned out to be a complicated fix. First replacing suspect parts, and returning twice at no extra cost until they had resolved the issue and we had heat again. It was lovely to deal with two people who clearly enjoy their jobs. Would not hesitate to use this company again.