We need to replace our 1980's Vaillant gas boiler. We have hot water baseboard heat with a mix of fin tube and cast iron. When the boiler was working the water temp was set at 180 degrees and we had no complaints. The boiler is located in a closet in a room that would be nice to be able to use as a bedroom. Hot water tank is in the same closet, gas fired 50 gallon tank that is 8 years old. What is the longest lasting, least maintenance required and quietest boiler that is the safest in a bedroom? We could provide sealing doors on the closet or any other safety measure. Draft venting, direct venting, cast iron, mod-con are all options. There is no drain in the closet or nearby for condensate. A pump would be required for condensate as this is located in a half basement. House is 2,400 square feet, well built 1960's home with new windows. Welcome any comments or suggestions.