Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
It's probably impossible to have zero unmet hours due to factors such as basements, thermostat setpoint schedules, season assumptions, and the Manual J/S sizing algorithm in general. 45.33 unmet heating hours out of 8760 = ~0.5%. I believe Manual J/S dictates that design day conditions exceed 99% of annual hours, so 0.5% seems totally reasonable to me.
Oversized electric baseboards are best suited to getting zero unmet hours since they can heat conditioned basements with independent thermostats, as opposed to heating them as a slave zone.
