We upgraded 20-year old furnaces for 2 new Carrier high-efficiency furnaces. A crew of 3 workers from Elite installed the furnaces in one day (approx. 9am-6pm). The installation was fairly intensive, they put in new venting and piping as well as the furnace units themselves and the thermostat. The staff were very nice, courteous and professional. We did encounter lots of problems initially with the thermostat - it stopped working out of the blue on several occasions, which turns off the furnaces - but Elite came to fix it promptly each time. The furnaces needed adjustments, which took several iterations. This was frustrating for the family because we were without heat during the winter. Contacting Elite over the weekend on their "24-hour" line didn't give adequate response time - we called them once on Saturday and only heard back on Monday. However, after their 4th visit to fix the furnaces, we got their cellphone numbers and the furnaces have been working well since. With the government rebates and Carrier rebates, upgrading our furnaces was a good deal.