Problem: Plumber says that in order to run a baseboard radiator in our new bonus room at 180 degrees and keep the in slab running at 120, it will require about 30 hours of labor to replumb the boiler and add in mix valves etc.
we have a Navien 240e combi boiler that is heating a 24x30 very well insulated basement and is now going to be heating the slab of our very well insulated 26x32 new garage and 12x10 breezeway.
I could save about $2000 by running the baseboard at the same temp as the floor heat. I have 20’ of wall space that I can fill with radiator. Considering Runtal 4 tube unit.
Apparently I need about 10,000 btus in the bonus room to hit design temp. The Runtal unit at 130 degree water temp puts out about 8900 btu.
The guy at Runtal asked if my boiler had an outdoor reset control on the boiler. It is not installed. I guess he was thinking that the boiler could push hotter water on the colder days if it was installed... although I thought I’ve heard that you shouldn’t run anything above 130 degree water through a slab...
Any thoughts on what the best play is here? There’s also going to be a mini-split installed, so we are really just trying to cope with the worst of a Minnesota winter with this baseboard element.
we have a Navien 240e combi boiler that is heating a 24x30 very well insulated basement and is now going to be heating the slab of our very well insulated 26x32 new garage and 12x10 breezeway.
I could save about $2000 by running the baseboard at the same temp as the floor heat. I have 20’ of wall space that I can fill with radiator. Considering Runtal 4 tube unit.
Apparently I need about 10,000 btus in the bonus room to hit design temp. The Runtal unit at 130 degree water temp puts out about 8900 btu.
The guy at Runtal asked if my boiler had an outdoor reset control on the boiler. It is not installed. I guess he was thinking that the boiler could push hotter water on the colder days if it was installed... although I thought I’ve heard that you shouldn’t run anything above 130 degree water through a slab...
Any thoughts on what the best play is here? There’s also going to be a mini-split installed, so we are really just trying to cope with the worst of a Minnesota winter with this baseboard element.
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