carriagehousereno
New Member
So i'm about to disconnect my old Weil-McLain boiler and hook up a new Navien NCB 240 combo boiler which we've been using for DHW since January.
I know, I've already been told elsewhere on here that the NCB 240 is overkill for the size of the house and may likely not work efficiently because of this. Unfortunately I was consulting a local plumber when starting the project and purchasing the boiler instead of consulting this community, He recommended it based on our DHW needs, the boiler already has been purchased, installed and in use for the DHW since January.
I was interested in the possibility of using radiant floor heat on the first floor since I have access to the underside of the subfloor and keep the cast iron radiators and cast iron baseboards on the second floor. My main reason for wanting to do away with the cast iron on the first floor is to free up the space that they are taking up. I'm not opposed to reusing them, but think I would prefer not to. I know they don't take up that much space, but the rooms could be configured much differently if they weren't a factor. I guess it all depends on how easy it would be to utilize both radiant and cast iron with this condensing boiler that we have.
The home is a little over 1700 square feet. The first floor includes a small 450sf one bedroom apartment. I was hoping to have 1 radiant zone for the apartment, 1 radiant zone for the remainder of the first floor and 1 zone using cast iron radiators for the 3 bedrooms and bathroom on the second floor.
The first floor is 3/4" pine tongue and groove subfloor with 1/4 oak hardwood face nailed on top of it.
The crawlspace under the subfloor is approximately 4 feet high with 90% of the floor being concrete and the other 10% under the boiler dirt floor.(most likely will be pouring concrete there as well as soon as the boiler is removed). The foundation around the crawlspace is uninsulated stone and brick.
I haven't done the load calculation for each room/zone yet, but I'm planning to use one of the online calculators to do this early this week.
Any advice would be appreciated.
Thanks in advance.
I know, I've already been told elsewhere on here that the NCB 240 is overkill for the size of the house and may likely not work efficiently because of this. Unfortunately I was consulting a local plumber when starting the project and purchasing the boiler instead of consulting this community, He recommended it based on our DHW needs, the boiler already has been purchased, installed and in use for the DHW since January.
I was interested in the possibility of using radiant floor heat on the first floor since I have access to the underside of the subfloor and keep the cast iron radiators and cast iron baseboards on the second floor. My main reason for wanting to do away with the cast iron on the first floor is to free up the space that they are taking up. I'm not opposed to reusing them, but think I would prefer not to. I know they don't take up that much space, but the rooms could be configured much differently if they weren't a factor. I guess it all depends on how easy it would be to utilize both radiant and cast iron with this condensing boiler that we have.
The home is a little over 1700 square feet. The first floor includes a small 450sf one bedroom apartment. I was hoping to have 1 radiant zone for the apartment, 1 radiant zone for the remainder of the first floor and 1 zone using cast iron radiators for the 3 bedrooms and bathroom on the second floor.
The first floor is 3/4" pine tongue and groove subfloor with 1/4 oak hardwood face nailed on top of it.
The crawlspace under the subfloor is approximately 4 feet high with 90% of the floor being concrete and the other 10% under the boiler dirt floor.(most likely will be pouring concrete there as well as soon as the boiler is removed). The foundation around the crawlspace is uninsulated stone and brick.
I haven't done the load calculation for each room/zone yet, but I'm planning to use one of the online calculators to do this early this week.
Any advice would be appreciated.
Thanks in advance.