We have owned an HHH 100 X 168 furnace for 10 years our cost of ownership has been minimal. The technical support we receive from HHH is far superior to that of the various equipment vendors we do business with. The team at HHH is always available and willing to go that extra step to make sure we are 100% satisfied. The team at HHH has saved us time and money with providing a quick and easy fix to whatever the problem is. Our next furnace will be an HHH.