I have been a Stadtler customer for 25 years. Their sticker was on my furnace when I bought my home so I thought why not call them. They are always professional neat and on time. When it was time to replace my entire system I called Statler they were competitive the installation went flawlessly and my New Lennox System is state-of-the-art. I recently had a two-man crew out to clean the entire system after some Home Remodeling, both guys were so nice polite and a pleasure to work with. Thanks Stadtler for providing a no-brainer solution for my HVAC needs.