Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
hello, I'm assuming that you want to model a radiant heated floor. You need to ensure that the internal source is checked on in the floor assembly construction dialog. as the error says, refer to the design builder program help.
If you already checked on the internal source box, then you need to ensure that the internal source is thermally closer to the inner surface than the outer surface. If the total R value from the internal source location to the inner surface is greater than the R value from the internal source to the outer surface, you will get this error. Basically, this ensures that the majority of the heat is going to zone, not the ground.
