I am in the process of purchasing a home and I know that the existing water heater is leaking or about to start leaking and the boiler does not look like it is im much better shape. Since the home has gas I was thinking of getting modcon boiler (similar to an instant hot water heater) and an indirect hot water heater. I know I want a stainless steel IWH with a lifetime warrenty. I also know a heat load calc needs to be done and I will most likely do it myself ( I am a mechanical engineer, I will two it at least two different ways to make sure my numbers seem correct). I also plan on doing the install myself.
With some educated guessing I think a 40K to 50K btu /h boiler will be sufficient. The house is a 2200 sq ft high ranch from the 60's. it has replacement windows and vinyl siding. Baseboad heat. there are 2 heating zones. location is long island new york.
Since I plan on saving money by doing the install myself I don't mind spending a little more on a quality system. I am looking for some recommendations one manufatures and what models to look into and what to stay away from. Does it make sense to get a tanka nd boiler from the same mfg? or is this not much of an issue? I have been reading through the install manuals from different mfg's and sometime it looks like it may make it easier installwise to stick with one mfg.
Thanks in advance.