Manual J for Passive Solar
I am building my own 1663 sq ft home out of Faswall ICF blocks. R25 walls, R50 ceiling, R10 floor. The house will be a south facing, passive solar home with an exposed slab on grade floor with hydronic in-floor heat. 81211 zip code in climate zone 6. Normally people don’t have or use AC here – just heat.
Manual J calculation is stating a 50,000 BTU heating load but I am not convinced that the Manual J methodology holds up when you are building a tightly sealed, passive solar home.
Does anyone know anything about this? Is there a modifier I could apply that would account for the passive solar heating impact? I am trying to avoid over sizing my Chiltrix system.
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