First time homebuyer here and recently found out that we will most likely need a new boiler. This is the story. We first moved in and turned our heat up to about 68degrees and found out that our natural gas bill is really high (about 400 dollars.) We were reading other forums and found this is normal for a 3600 sqft house that is heated on every floor. We then tried to turn some radiator valves off and had some success with some and were unsuccessfuly with others. We were able to turn the valves off and we "thought" that the the hot water wouldn't be able to get into the radiators so when we turned the heat on again, sure enough the radiator was warm and now not hot, but some were cold. We also have a 175,000 BTU boiler and has seperate standing pilots for the hot water heater and the boiler.
We had a couple heating "specialists" come in and they said our boiler was fairly new and that it seemed to be working fine. We adjusted the pressure to the correct specifications, nothing more that we could really do, except getting the yearly maintenance done on it and thats where everything goes sour. The technician came down and wanted to take the screw out to do a gas pressure test from the gas valve, but was unable to do so since it was stripped... They said a new gas valve, the box thing before the gas goes into the boiler costs about 400-500 dollars and also mentioned that this boiler is about 20 years old, so probably not that sufficient. We speculated to get it looked at when we checked our meter during the day and the heat at 63 degrees it used about 18 ccf's with not using any hot water, our last bill was $550.
Long story short, we are looking to get a new gas boiler and we are going to get a couple free estimates, but wanted to get a ballpark idea on how much it will cost for a new boiler if anyone here has recently purchased a new one and installation. I know its different for other companies to do it. Also with our radiator valves closed they still are warm when the heat turns on, I also wanted to know if getting a new boiler will help with that or its not worth considering until the valves are replaced and see how much gas we use.
Thanks for the help.