Hi. I just joined this site and I have a question. I am building a RMH in an aquaponic greenhouse and I am planing to use a six inch stove pipe with a ten inch galvanized duct over it and filled between with perlite and refractory cement. There is not enough headroom in the greenhouse to set the heat riser in place and then slip a three foot high 55 gal drum over it. I see no reason why the heat riser cannot be built in two sections and stacked but I wanted to check and see if anyone sees a problem with this. Hope this isn't a dumb question.
The so called 5 minute riser is a piece of ceramic fibre wool cut to the right size and pushed inside a metal tube. The method is relatively cheap and only takes 5 mins to construct! This would mean there is not metal exposed to direct flame and due to the insulating properties of ceramic fibre, the riser will be very effective and long lasting. Sorry that this forum photo stash is full but I am sure you can google up a picture.
That looks pretty interesting. I don't know much about these things. I bought a Rocket Mass Heater Builders Guide from Amazon. That's about the extent of my knowledge. I think I found this site from looking up information about building heat risers. I've looked though quite a few threads since I recently joined here. Haven't found much about people heating greenhouses. This is an experiment for me. The greenhouse is only ten wide and twenty long. It it works out I'll be going bigger. thank's for the information.
Last Edit: Jun 25, 2019 4:32:26 GMT -8 by dirtdevil
Post by wiscojames on Jun 25, 2019 13:13:32 GMT -8
The OP didn't say he was thinking of using a steel riser, but a fireclay-perlite riser with a stovepipe liner. That'd be OK with the understanding that the stovepipe liner would eventually burn out. I've used a Sonotube liner for that purpose. The fireclay-perlite risers work well, and are durable if made right. They are heavy, though.
Yes, I was aware that the inner liner would burn away. Most of the builds in the book I have use a fire brick riser with insulation wrapped around the outside. Fire brick is expensive. I have already laid up the burn tunnel up to where the heat riser will start with fire brick I already have on hand. I have cut the base barrel for a manifold and fitted it around the fire brick. I have the perlite and half a bag of refractory cement on hand. I have the stove pipe and duct already but I am going to look into the ceramic wool. I have some knowledge of working with high temps because I am a hobby blacksmith and do some metal casting. I'm not familiar with a batch heater. I'll have to look that up. Very cautious about what I breath. I appreciate the input.
Having spent some time looking through the the site and reading threads I have decided that the recommendation for the Ceramic Fiber heat riser is the way to go. Looking for a place to buy it I find most listed as 2300 F and a few as 2400 F One was 3000F My question is if the 2300 F blanket is sufficient? Also is a one inch layer enough or do you need to double it?
martinm: any one here with info \ experience with heat (from a mass heater) distribution with ducts throughout two storey house ?
Sept 8, 2018 22:58:52 GMT -8
padica: Good morning, this is a wonderful subject, please someone can help me with the theme of double and triple combustion, how it is achieved, theory and design, thank you
Sept 15, 2018 7:13:40 GMT -8
wiscojames: I'm afraid you won't get a response to such a vague question - I suggest reading through some of the threads related to your questions before asking for an explanation. People will be very generous with their knowledge if your question is more specific.
Sept 18, 2018 4:48:00 GMT -8
daniel: in my experience as I am working now on something of that nature, I have thought of making a heat exchanger and distributing the heat through vents using a slower fan. Now after a few years I realize that mass heaters give out primarily radiant heat, for
Nov 30, 2018 12:48:38 GMT -8
coastalrocketeer: Anyone posting in this shout box... if you have something you want people to see and respond to, create a thread in the appropriate forum section... this is not the place...
Dec 16, 2018 18:10:49 GMT -8
vesuvius: High Temperature Glass options,
Jan 4, 2019 16:28:17 GMT -8
vesuvius: Do any of you have experience with using the glass from home oven doors on a rocket stove? I'd like to have a viewing port on my stove but don't want to fork out for new ceramic glass. Any thought as to whether it would take the heat of a rocket stove?
Jan 4, 2019 16:30:40 GMT -8
yaya: you dont need the blowair for that temp..
Jan 13, 2019 16:43:57 GMT -8
flybywire: Glass window from an old washing machine is designed to take high temps. Cheap solution to your need.
Jan 27, 2019 0:10:58 GMT -8
coastalrocketeer: Anyone posting in this shout box... if you have something you want people to see and respond to, create a thread in the appropriate forum section... this is not the place to have a discussion... it is for short announcements
Feb 7, 2019 0:11:23 GMT -8
coastalrocketeer: you won’t likely get replies to questions here, and it is not a spot that makes holding an ongoing discussion possible...
Feb 7, 2019 0:12:22 GMT -8
TexasGonzo: Sooooo glad I found this site! Its always rewarding to find such a super group of folks! To any and all, feel free to PM me anytime. Thanks for having me!
Mar 11, 2019 18:56:41 GMT -8
jlmtech: GADGET: CONSIDER USING A JET PUMP INSTEAD OF A BLOWER FAN TO INDUCE DRAFT; NO CLOGGING.
Mar 26, 2019 8:19:28 GMT -8
michaelegan: i am unable to open the sketchup files on my mac. I used sketchup a few years back but apparently the company now requires a subscription. does anyone have any advice/instructions on how to use the program or how to view pictures without spending money?
Aug 20, 2019 18:41:48 GMT -8
mannytheseacow: michaelegan: download AutoCAD student version for free... import .SKP
Aug 23, 2019 13:33:44 GMT -8
topbaza: hi everyone, been searching all over net and this is were i need to be i think!!
Sept 28, 2019 6:16:25 GMT -8
anounaki: Hi, why I cant upload photos when I make new tread to this forum?
Feb 28, 2020 2:09:40 GMT -8
ahansen: photos under 1 mb not possible?
Jun 4, 2020 0:09:21 GMT -8