Highly recommend them.Had just had another company come out after experiencing issues with our furnace. The first company ,which I won't mention because they aren't worth mentioning,but if you check reviews, you find out who by the pattern if telling us there is a lot wrong,but need to have a supervisor(actually should call him a high pressure salesman)come out and tell us we need a whole new system and all new ductwork ($16,000!!!),needless to say we wanted another opinion.We were in Home Depot for something else and saw the $8.88 offer for a tune up,so we figured why not,we did need a 2nd opinion.It turned out to be an outstanding experience with Kettle Moraine and technician Damyon(who it turned out went to school with my son tears ago) who was excellent. He wasn't trying to sell us something and found the main issues which will need attention in the near future, but were ok for now.He was able to just with the tune up to get it to work properly and went above and beyond with a few tricks to get it working correctly. He did let us know what really needed attention in the short run to make it work in the long run and many of the things the 1st company said needed attention, actually didn't.Love to warn you about the 1st company, but will let it go for now.Will definitely reach back out to them after the holidays to fix necessary issues. Kettle Moraine will be who we will be calling and Damyon is who we will ask for.Cannot recommend Kettle Moraine more,they have great people! read more