Venting a rmh

Hi this may not be the tread to post this but im new here and couldn't figure out how to start a new thread, my question has to do with venting the rmh dose it have to go up and through the roof or can I vent it out through a wall? If I do vent it through the roof dose the extra pipe present a problem like introducing smoke back? and where can I get this book on building them? thanks

Charles Schmidtke : 1st, Welcome To Permies.com, our Sister Site, richsoil.com, and a Big Welcome To the Rocket And Wood Stoves Forum Threads!

A Good Vertical Chimney should be part of your planned build of a Rocket Mass Heater RMH, You did not give us your general location, All Cold Climate Housing
Functions better with ether an interior Chimney, or an insulated Exterior Chimney ! Irregardless of Climate/Location The Top of the chimney should clear the peak of
the Roof by 3'-5'! This assures good 'draw', and prevents /eliminates smoke back problems in well built RMHs !

This will Double the over-all cost of your RMH, but this is the best place to go with the very best materials and should be budgeted for !

Please go to rocketstoves.com to download your copy $18 of the Brand New Third Addition of Ianto Evans' Great Book '' Rocket Mass Heaters '', and
consider this to be your 2nd stop for any future Questions or Comments on any thing you observe, as a fellow member thesis your forum ! Big AL !

thanks for the info ill put that into my plans I am going to be building a house in Greencastle, Indiana I want to put the stove in the large open living area the house is going to have a large stair case in the middle of the house and open up to a big landing that all the bedrooms and bath room will open up to I also plan on putting vents in the celling that open up to the floor above to get more heat up stairs, as a back up im going to install a minisplit system through out the house but I don't think I will need to use it to heat as I am also going to have a wood burning cook stove in the kitchen that I will use during the fall and winter months. one thing that concerns me is that I am going to be using SIPs to build they make for a very air tight house should I plan for some makeup air from the outside? too many questions also can I make the feed port taller to allow for longer sticks?

charrles schmidtke :With ANY Sips Construction I would have to say that An Air exchanger is absolutely necessary, You are both super insulating and also
sealing up your walls with impermeable barriers ! Its like putting on a sweater and then a plastic bag,You are going to drive moisture into the insulation !

OR its like putting on the Plastic Bag and then the insulation ! Generally the areas where you have bridging and all penetrations are problematical and need
careful attention to detail to prevent wet insulation and or Frost pockets ! I really would want to work for someone else, and learn how to do this installation
well, unless the construction crew has been trained in proper installation Techniques a Lot of potential problems will be hidden out of site to come back to
haunt the homeowner in 10 - 20 years !

There needs to be a carefully sized air exchanger with a good Heat recovery system built in! I do not know of any units that work without 1 or more exhaust
fans ! This is just one mans opinion, but you should get a second opinion any way !

There is a direct Ratio of Depth of Feed Tube, Length of he Burn Tunnel and the height of the Heat Riser, and many of the ''Clever Gadgets" you see added onto
a rocket stove are there because the Ratio was not followed carefully, Get the book and come back here with any problems !

About 2'' above your original post you will see permies>>forums>>energy>>rocket stoves, when you click on rocket stoves you will be sent to the
list of all of the Forum Threads most recent first ! I want you to Find The Forum Thread video : great rocket mass heaters in upstate N.Y. and Quebec, it is
the first one I want you to watch, The open layout is conducive to good air flow and The temperature for the upstairs is regulated with a heavy blanket used
or not at the first Landing !

On The Extreme Right hand side of every forum page there is a NEW TOPICS Buttom Clicking on that Button will allow you a new post in that Forum,
be sure to Check out the other forums, Lots of other Good Stuff !

Lastly when you are the original poster, our computer looks for certain '' Key Words'' which it then uses to make a listing of '' Similar Threads " at the bottom
of the page, Some times you can find several good answers there ! Big AL

im going to pick up the books and study ill build a green house heater first to work the kinks out and go from there, I would love to build a house from tires like that but the wife would not go for it thanks for the video suggestions ill have more questions later.

ok so I got the book and have read it cover to cover twice now I see the importance of sizing the burn chamber and feed tube and riser correctly I watched the videos and have picked up some good info there as well I think this will work for heating the new house, My questions are 1. is it better to have the riser made from a round pipe or brick? 2. can I introduce air into the feed tube from outside via a 4" vent pipe with a metal blast gate so it can be shut down ? is it possible to switch the feed burn and riser to 10" without having to spend a billion dollars on super thick stainless steel and other components? also can cement be used in place of cob my wife isn't so hot on the idea of a mud furnace in the living room.

My signature has a blog address. Go to the blog and read the post on Thermal Mass. We have assembled pertinent details on many of the possible materials you could use for thermal mass. Cement does not tolerate as high a temperature as clay which is what cob is made from.

We also have some wife-friendly designs for living room heaters.