I had used Castle Maintenance for 10 years to clean my ducts on home property and rental properties. I never had any issues and appreciated their comments. Had a furnace emergency in Feb and they were called in. They were under-qualified for the job, didn't have the right parts, and instead of walking away, did a hack job. There were repeated attempts to contact them with no return calls. I eventually got another service company in to find out Castle had put in wrong motor size, wrong motor type, hacked the electrical system which left the furnace running all the time, which in turn has ruined the blower. $3000 repair bill or $5000 new furnace. Over a month ago, I sent a very nice letter asking for some acknowledgement of the poor repair and to request a conversation to discuss compensation. Have not heard from them. This is step one, then BBB, then court. For $500 I got my heat on, but had my furnace destroyed. There are better companies out there.