Williamson-thermoflo Gsa-200 - 125k Btu - 82.8% Afue - Steam Gas Boiler - Chimney Vent Review Sep 12, 2016

Built by a division of Weil McLain the boiler it is similar to their products. Seems to be build well and I hope to have years of trouble free working status. A little difficult to install given the position of the ports. I will recommend this product to others.

Ultra - 155,000 Jul 23, 2016

My suggestion is to have a very experienced high efficiency furnace plumber install the unit. From what I now know all aspects of the system need to be in balance to work properly. My unit is exceptional and my wife likes the colored pictures designating the various modes of operation.

Good Unit, No Problems Jul 23, 2016

Used this unit with a 12, 18, 9, 9 set up with a 4-way distribution box, it has worked very well with very little noise. There is a very high pitched sound you can hear if you are near it, but it is not very noticeable.

Installed Gree Unit Jan.29 2016 Aug 19, 2016

Ran unit Feb. 1 2016 heating very good super quiet, very please with it. Now waiting to run in cooling mode to see how it controls hot weather. I'll give it a 10 rating for now.

Well Made Heater Dec 20, 2016

This heater was easy to install, it is made of high quality metal. Nice to have power connections on both sides of the heater and ample amount of heat.