Posted by Harold Kestenholz - Hydronic Network on September 18, 2001 at 11:11:51:
In Reply to: Adding radiators to an existing system posted by Shane on September 18, 2001 at 07:00:16:
Your existing boiler can possibly handle the additions. Insulate well when expanding the attic rooms. The present upper story will have less heat loss with the floor above it beated, so some of the capacity will be transferred to the upper floor. However, because of that transfer, the radiation in the second floor will be more than needed, so do not add the attic radiation to the existing upper loop, but make a new loop from the boiler manifolds to the attic rooms so separate thermostats can handle the heat need. A separate radiant loop can heat your tile floor.