Michael Johnson

Len,

Thank you so much for the answer. I really appreciate the breakdown.

Looks like we will build the RMH in the great room and see how it performs over all, throughout the home. If there is the need for the extra heat (or we simply desire the ambiance) I will build another RMH in the master and run it through the other 3 kids rooms before exiting out. It is early on enough that we will work the great room unit into the initial build out.

Love this forum! Thank you again for all the advice and your valued opinion on things.

Michael

Couldn't find this in my search:

How long of a horizontal exhaust run (with a little rise) can one run on a RMH?

We are getting ready to build a long Earthship/PassivHaus Hybrid home and it is almost 90 feet long. We will utilize an standard/existing Earthship floor plan with the great room on the East end and all the beds and baths in line to the West.

Would like to build the RMH in the Great room, on the earth berm North wall, and run the exhaust ducting West through each of the rooms. I realize the last room, prior to exhaust gasses exiting, will get the least amount of heat but every little bit helps.

What'a we think?
Too far to run?
Put a second, smaller, RMH in the Master bed (furthest West room)and run it East to help heat the other rooms when necessary (we all usually like our rooms cool when we sleep)?
Concentrate effort/heat in the great room?
It's an Earthship chances are we won't need but the one in the Great room?

Thanks,
Michael