I had 2 Lochinvar Knight Boilers installed in my 2 family home 2 years ago and 1 of the 2 units has been nothing but problems since I had it installed. Each year since it was installed it has gone out of service and I have had to have a technician come by to service it. When it first when into service the main PC board on the unit went down within 30 days, it also went down an additional 2 times that year until the technician was able to finish troubleshooting it. In the mean time my heat was working on and off until he finished it. The next year it came up with service code errors, followed by this year the main fan in the unit went out and I was forced to pay an additional $900 to have it fixed. The units costed approx $8,000 each installed as they were advertised as the latest and greatest.
When compared to $4,000 each for the basic run of the mill boiler I paid 2x as much for a product that keeps breaking. I thought these units being over 90 percent efficent would save me money but infact they have done nothing but cost me money since they got put in as they are service nightmares.
To make the situation worse I contacted Lochinvar to see if they could help me with this last repair and they refused. Flat out just no not even a discount on parts. I feel I will never realize the savings on the heating costs because these units constanatly break and will cost me more in service then I will save. In addition Lochivar does not stand behind their products and if your installer reccomends one of these units ask for something else unless you want to keep his number on speedial everytime it goes down as I do.