Current situation is 66 year old cast iron Weil Mclain oil fired boiler working fine and annually maintained. New electric water heater. 2200 sq cape cod with baseboard and in wall convectors on 2 zones. Slant fin says heat loss is 53K Chimney is ok and original 66 years old Want to convert to gas and don't want to spend more than needed. Does not look like I can direct vent, too many windows to find a suitable spot. What I am looking for is a simple conversion with a durable boiler that is not so overly complicated that the service and future repairs will out weigh the fuel savings. I also have no floor drains in my basement which would require pump removal of condensate if I went that route. Your thoughts?

Hi everyone first time here and my first post.. Well i want to have a 3 zone heating system, i have a baseboard heat and trying to get everything together to start the project. I am looking at buying the taco z075c2-1 zone valves (51.99 each). The big problem i have is on my first floor i have mono flow t's and the second floor i have straight 3/4 copper no t's, and im adding heat to a room on the first floor on its on zone 3/4 straight copper so do i just install another normal T in the return line like the second floor was? So if anyone needs more info or pics let me know thanks.