allen lumley wrote:Alex ;Thanks for finding and sharing, this duplicates some of the work done by Fellow Member Rob T. (Bigelow Brook Farm on U-tube )
Even though there is no attempts at present to add in ground piping to The Wafati systems here at Permies the most basic idea , using
the summers heat load to 'charge' the thermal mass under the Umbrella is being tested now ! Big AL !
allen lumley wrote:Jeff Favelle : May I have a shot at modifying your goals a little? There is a very common mind trap that everyone with a limited amount of
space falls into!
About the 1st permanent improvement you make in your green house will be to figure out how to get things up off of the floor and save your
back! Here is where the Rocket Mass Heater RMH, shines, You will have ready-made benches, and heated seedling beds for ever! As soon as
you are inside your Greenhouse you have palace to set things down !
I even expect that as you start out at the very beginning of your growing season you will wish for a 1/2 dozen 55 gal drums full of water to
temper the temperature swings in your greenhouse every time you open a door! The amount of crowding you find acceptable will change
according to your needs !
Speaking of setting things down, Now is the time to think about An air lock type of shed addition to reduce cold air falling into your G'house
in the early days/weeks of your growing season every time you need to enter or exit your Greenhouse!
Because your RMH demands small, very dry, fine split wood, storing your wood within the greenhouse with its high vapor content will be a
problem! You can create an attached air tight wood box to load from outside, and unload on the inside, with the ends of your building being
preferred, Not under your eaves with their snow load !
You certainly should have enough ventilation, I am quibbling over your word choice Smoke Vent This would imply to many that you
were not planning on connecting the two together with hard pipe, This may or may not work for you -most of the days of your growing/heating
season! When your rocket is fired-up and running you may not have a problem, except with cold starts !
My recommendation is to try it your way, but to have a budget that allows for needing a Tall Vertical Chimney at least 4' over the top of the
greenhouse roof, and any nearby object bigger than a TV Antenna ! For the Good of The Craft ! Big AL