I have 120 year old Victorian home, 4000 square feet 10í ceilings with HW baseboard heat. Iím looking to replace the current boiler (CI 100Kbtu net) with a something new. Iím having a hard time keeping a 66 degree set point when the weather outside goes down to 5 or below, which happens here in upstate New York all too often. My gas bill was over $500 last month and I need to do something to reduce this. I have replaced nearly all of the windows with insulated vinyl and I've caulked and stuffed and caulked as many cracks and holes as I can.
My first step is to pipe a pry-sec loop system with OA reset and put a circulator pump on each of the 4 zones.
My next step is the boiler; I really like the weil-mclain ultra 230 but most professionals I talk to are telling me not to get it. I have read through a lot of threads on this site as well as others and have found mixed opinions on these boilers. It seems most people donít like them due to cost. Others seem to think that they are not as efficient as advertised. I would like to know why people think they canít make their 94% AFUE at temps over 140. All of their literature claims that they are 94% at regular temps and up to 98% at low temps. When you pay $500 a month for gas, every Btu you can get from your boiler counts.
Another suggestion I got was to put in a copper fin laars boiler with a 2 stage gas valve. This solution however will only deliver an 82% AFUE.
Am I wrong in thinking that with an 80% boiler, for every dollar I spend on gas 20cents goes up the flue, & with a 94% boiler only 6 cent goes up the flue?
Any suggestions would be appreciated especially from people that own these units