Afternoon, I love the forum comments, knowledge, and experience here. I'm a new house owner of a 1917 house, in Upstate New York, with a 20+ year old gas boiler to cast iron radiators. I've been looking to replace it with a combi boiler from Navien. I'd like the floor space when the Utica boiler is removed and the head room with the black pipes removed hanging in the basement.
Can black pipe be cut at the "beginning parts" going up into the 1st floor and copper make the connects from a combi boiler? The current black pipes all reduce to 1" pipe feeding the 1st and 2nd floor cast iron radiators? (I'm reading some people have trouble with combi boilers with iron pipe leaving iron particles in the combi boiler. The Navien NFC has a magnetic filter it appears to reduce this issue?) In a perfect world I'd enjoy a Navien combi boiler that runs copper to the 1" black pipes at their starting points leaving the basement ceiling. (I'd have the installers cut the 1" black pipe with 6" hanging down from the basement ceiling if an option.)
Upstate New York House
House SQFT: 1700
House Year: 1917 - Energy Efficient Windows, Good Insulation.
Always enough comfort heat for family of 4 and hot water for showers from a hot water tank.
Utica, NY Boiler (Water 116,500 BTU/Hr)
Piping: Black pipe - 1", 2", and 3" (Basement ceiling is open for full access.)
Cast Iron Radiators used in all rooms.
Navien NFC Specs - https://www.navieninc.com/series/nfc/downloads
Lastly, the black pipe has elbows with wrapped asbestos. I could re-wrap the elbows and cut away pipes but wondering if it's scrap metal then or a hazard for a company to handle? I assume it's a local issue ruling but if they'll going to the dump with them I can surely accomplish it too. Also I imagine the Utica boiler doesn't have asbestos but I'll double check with the company on that one and possible do an at-home test on it.
Please ask any questions, I've chatted with a people who would like to know some or all of these issues. Thanks!