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House design with RMH (questions)

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We are in our design stages of our house and would like to use a RMH for heat. At this time I am not sure whether how we would like to place it is smart and doable or not. We are planning on having an attached greenhouse room (solarium?) and would like to use the RMH to help heat this room during the winter.
Pics attached and please be kind with my Sketchup skills  

Our house will be 3' off the ground on piers. Will be using 12" engineered I joists spaced at 16" centers with 3/4" T&G subfloor.
Will we need to add more support under the RMH?

We also have plans to do rediant flooring (not heated by RMH)

We would like the RMH at the south facing outside wall in the center of the house to help heat the green room. We also want an open floor plan which would be taken away if we placed the RMH in the center of the house.
Can we run some pipes from the heater into the green room or will all the heat have to be from the thermo mass off the RMH?

Can a flat screen TV be hung on the front of the RMH like they do with fireplaces?

The center of the front of the house where the RMH will be is 25' wide. We are planning to have 2 accordying glass doors (one on each side of RMH) to help control climate and let in light etc. we are flexible on how wide the doors and/or RMH will be based on design of the RMH.

Any suggestions on design?
Any suggestions on books, videos etc that do the best job of explaining how to successfully build it?

Thank you in advance for any help.

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Posts: 3111
Location: Upstate NY, zone 5
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I think your RMH is excellently placed for the basic layout. It will be a foot or two thicker than you show, but having the mass be the wall between the main room and solarium will let it heat both spaces effectively. My RMH is at one end of my ~25' x 26' main floor, and the far corners are cooler but still comfortable when the area near the heater is comfortably warm.

I would suggest a mass wall with a 6' high x 4-6' wide x 12-16" thick cavity (called a "bell"), containing the RMH heat riser. I would put some moveable insulation on the solarium side to avoid overheating it and allow fine-tuning.

The mass wall in this location will serve as solar thermal collector/storage as well as RMH, so you are getting double the use from it.

The RMH will definitely need extra support. I would at the least put a pier under the center of it, and maybe two, depending on how heavy you make it. This brings up the question of your climate. How cold does it get, for how long, and how sunny or cloudy is it generally during the winter?

Glenn Herbert
Posts: 3111
Location: Upstate NY, zone 5
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Hanging a TV screen on the mass wall is not the best idea. It will block a good part of the heat from radiating into the room, and possibly be overheated by closeness to the mass. It would be possible to cleverly arrange the bell cavity or cavities to mitigate this.

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Location: Southern alps, on the French side of the french /italian border 5000ft elevation
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