allen lumley wrote:Jimmy Smith : The Rocket Mass Heater RMH has been given a bad rap by the vary people most in love with it, not done in spite of our high regard, but Because
of it !
Yes it is true of the RMH, exactly like all wood stoves that they should be carefully located centrally within the home and should not be left unattended! It is also
true that the rocket mass heater like all wood stoves needs a operator who has taken the time to learn how to start the morning fire, but name any other Wood
stove that will have an operating temperature consistently above the ignition temp of creosote ~ 500ºF~ by 1500ºF within 5 minutes of its start! Further the core
of the RMH will maintain that temperature until after the fire is out !
The RHM will need several seconds attention perhaps as many as 2-3 times within the first hour, thereafter the skillful operator, alerted by the current depth of
the Rockets roar will again spend several seconds to tend the needs of his rocket per hour, this amount of attention done Automatically with no more thought
given than you expend adjusting your glasses. Depending on weather/climate, this service to Your RMH Spread out over a 3-6 hour period, will provide up to 24
hours of hands off Radiant heating !
A fair comparison is like having a Amply Savings account into which you deposit small regular deposits of Small very dry fine split wood and receive Automatic
withdrawals of Heat, Soul hugging, bone warming heat !
Ah, but you tell me that a masonry heater can do the same job only better. Well kinda, not at the freaky high Temps that ensure the clean burn and higher
efficiencies, A simple price comparison shows that unless you posses the necessary skill sets yourself the cost of a 'Russian ' Masonry stove is easily several
thousand dollars ! This compares to the cost of a D.I.Y. built RMH which is do-able by most 'handy' persons, who find that building one to code requires a final
vertical chimney of no greater cost than the ones required for ether a conventional Wood stove Or a 'Russian',Masonry stove ! Indeed this is often over 1/2 the
cost of a well built RMH.
There are many areas with high winds located in 'upstate' New York, but careful siting and due diligence in installation should allow the RMH to work anywhere
the conventional wood stove or Masonry stove will work !
I am offering a link to a E & E Wisner Build located outside of Canton New York, this is now in its 3rd heating season and working well, and I can even show you
a crapy built RMH ( the owner tried to many modifications to sort all its problems) with a poorly sited chimney that works flawlessly after its initial lighting
problems are overcome !
See Link below :
The first installation shows a typical installation and whole house heating load !
Four the good of the craft ! Big AL
Glenn Herbert wrote:Not wanting to tend a J-tube (or especially have a less-skilled person tend it) and wanting a smaller footprint than a traditional RMH bench are valid concerns.
I think both could be addressed by marrying the RMH and masonry heater, as has been done extensively at the forums at donkey32.proboards.com. You can build a batch box which feeds the RMH heat riser for complete combustion, and enclose it in a masonry bell or two for upright mass storage. I believe the design and construction of this, as long as you follow the published interior dimensions and ratios found on donkey's forum, should be less tricky than making a really good contraflow masonry stove. You can totally use all of your brick and your masonry skills to do this in your chosen material set instead of the usual RMH cob.
A batch box does not have any more possibility of smokeback than a masonry stove, maybe less.
Keith Coldrain wrote:Jimmy Smith ^ ©
I'm wondering just how different your "older" lopi stove is from that newer very efficient lopi endeavor that has the secondary burn chamber? Maybe you could upgrade it with a little modification?
Just a thought.
And just a suggestion here, you might want to visit the woodheat.org website for advise on getting more out of your current wood stove.
As for your quedtion. There may be other mass heaters, but the only other one's I've looked at are at
They have some really nice units. Some with ovens too.
Richard Wood wrote:
no insulation, Kiln brick.
Sent you a pm Jimmy,
Double door, helps, but still needs upper smoke bypass. Water tank getting added soon, to transfer to radiators in house.