Pros: Quiet, compact, efficient, flexible.
Cons: May depend on the installation. Can be expensive.
Had this installed 5 months ago in October 2010 in cold winter Canada. Two story house with basement so three heating zones, Has handled the cold weather no problem. Wall installation has freed up much floor space in utility room. Very quiet compared to the large1978-ish boiler I had before. Have no doubt this unit will pay for itself over the long term. Installation took longer than expected. Every boiler installation is different depending on where current piping is, gas pipe location, proximity to a suitable outside wall, and drain, etc. My piping was a litle tougher just because of where the boiler had to be mounted, but it turned out okay. Only issues I had were related to the...(read more)