Mitsubishi multi-zoned system for passive house too much?
I’m building a 4 bedroom passive house with about 3,200 sqft of conditioned space including a home office and a 2 car garage and 1 car garage (workshop) totaling around 800sqft. I would like to use an 8 zone mitsubishi system with horizontal ducted indoor units. Zones will be assigned to each bedroom (zones 1-4), the home office (zone 5), the main living area (zone 6), the 2 car garage (zone 7), and the worshop (zone 8).
I have a few questions:
1. Can each bedroom and the home office be their own zone? It’s a passive house with really low requirements. The smallest heating and cooling capacity of the 8-zone unit is 54k and 48k btu/h respectively. This would address the sleeping comfort customization for each room. Some people like to sleep in cooler temperatures and others like to sleep in warmer temperatures. Is this 8 zone unit too large for the home where it won’t work efficiently?
2. Since I can go up to 8 zones, I thought it would be nice to be able to condition the garage and workshop on an as-needed basis. Anyone see any issues with this?
As always, the feedback I received here has been amazing! Thank you!
GBA Detail Library
A collection of one thousand construction details organized by climate and house part