Had to replace a condemned mid-efficiency with a high-efficiency on short notice. Everyone that looked at it said it would be tricky due to the positioning of the furnace and layout of the basement, and the need to run new exhaust out the side of the house. One company even told me they couldn't manage it.
Len's installer got the furnace venting in without a hitch, along with the new furnace and water heater. Everything works fine and to my satisfaction.
Service was friendly, efficient, and accommodating. Would definitely recommend without hesitation.