Ld Waite

Ok, hollow mass wall, instead of pipes through the mass. I like it.

Hi Al,

Thanks for the info.

I'm western finger lakes region.

I understand the 4" have problems. I only have 750 sf of work shop to heat. But I'm not opposed to going 6".

I'm wondering about the vertical heat storage. Level vs sloped pipe.

Lynn

I would like to sit or stand in front of the thermal mass. A wall instead of a bench.

I'm thinking of using a 4" cast Dragon Heater core.