l lines

Thanks.

Have you got any links that are worth checking out don't know much about them

Thanks for that. Great answer with plenty to be thinking about.

The reason I was leaning towards a 4in system is mainly to do with the chimney currently in place. Ive been thinking of ways I could do a 6in system and would far rather buy the issue is chimney. Realistically I don't think I'll have time to take it out and replace before winter. Which leaves me with the problem should I put in a traditional coal stove this winter and wait until I can redo the whole thing or try with a 4in system which could well work.

My thinking to get some mass into the pocket rocket was to set a square tank in brick (ie wall around three sides of the central steel combustion chamber) and gain mass that way. Plus a fair proportion of the current chimney is brick so there would be some mass gain there as well. But still I think a RMH would work more efficiently and provide a cooking surface.

Any thoughts on whether it's worth trying for a 4in system. I'm in Kent in the South east and would love to see one in action over here if anyone knows of any

Thanks again

Hi all I am looking for some support.

I live in the UK and am moving into a tini space (109sq ft) I need to get an efficient heating system in that will run on small scrap wood and has some mass to retain heat over night. I have very little space for a log store so efficient is key.

My thinking is to put in a very small RMH with just a small amount of mass that I can top up morning and evening just to keep the winter chill at bay overnight.

There is currently a 4in flue in place and I'd love to use it if it's viable to do a 4in system as taking it out would be a massive job.

Alternatively I've been thinking about a pocket rocket with mass built in around the barrel on 3 sides and underneath if this would work better for such a small space.

I'd love to hear any thoughts or pointers to examples of 4in systems

Thanks

Hi all.

I have recently moved onto a narrow boat/barge and would like to put in a compost toilet. The toilet can be out of doors but space is a premium so any thought about what might work.

I should note there will be two of us male and female so ideally a solution needs to accomdate sitting and standing.

Great to hear any suggestions

Anyone know a ratio or equation that allows you to calculate the possible length of a horizontal flu from the hight of the heat riser.

e.g. heat riser = a
multiplier = b
therefore a x b = c (length of the horizontal flu).

I understand that the taller the heat riser the stronger the draw but it would be great to know what the ratio/equation is to calculate horizontal flu length limited by the hight of the heat riser. And if there are any lower limits on either side of that equation.

Any thoughts would be great and appreciated.

I have a 2.5 foot tall barrel and i would like to use it as the barrel for my RMH, from what i have read it seems that the taller the heat riser the better the performance. I am only heating a small space so the exhaust run could be short.

so my question:

can you create a rockety burn with a very heavily insulated but only 2 foot tall heat riser?

and if so would this work better with a larger internal cross sectional area, perhaps 8in?

any answers would be appreciated

L

Thank you for your reply i really appreciate the information,

What i ment by a 4 in system was that i would be using 4in stove pip for J tube and the flue. the reason i thought 4in was only because it only needs to be a small system. So jumping up to a six inch if its generally considered to be a safer bet would be no trouble.

The caravan will be static so I probably be doing something with thermal mass, I think i have a good understanding with regards to the principles of a RMH, and Rocket stoves and I was wondering if the two could be combined but Im beginning to think that perhaps the combination of the two might not be the best idea.

However, one question I really would like to know the answer to is what is the minimum hight for the heat riser on a six in system (that is, a heat riser made of six in stove pip). the reason being is that i have a two barrels one about 2ft tall the other 3ft and i was planning on using the smaller as the structure for the heat riser and the other in place of the barrel.

Let me know what you think

Louis

Hi I have 2 questions

I'm moving into a small two person caravan and i would like to put in rocket stove large enough to heat and cook.
I would like to know two things, if any one could help i would be incredibly grateful.

1) what is the minimum hight of the heat riser i could use on a 4 in system, bearing in mind that there wouldn't be much of a horizontal run, the chimney would maybe run five feet horizontally then outside and up.

2) My second question is maybe a little more complex. because i intend to be living in the caravan winter and summer and will want to cook without the radiant heat, i would like to know if could do two things with the rocket stove? 1: put a hole in the top of the barrel with a heavyduty close removable section, much like an aga/rayburn i use at the moment (see the right hand side of this stoves cook plate: http://mud4fun.files.wordpress.com/2012/09/new_rayburn-1.jpg). My concern is that i might not get a tight enough fit and that there would be a leaking of gasses from the top of the barrel. 2: if not i would like to know if i could create an easily removable barrel so i could switch from rocket mass heater to a conventional rocket stove quickly and efficiently, so i could use the stove either for direct heat cooking or radiant heat.

If anyone could give me an answer or let me know if im barking up the wrong tree and would be better off having both a rocket stove and a rocket stove heating unit please let me know I would really appreciate it asap as time is of the essence and i don't want to embark on a fruitless endeavour.

Thanks

Louis

a quick question: I'm new to this so i hope i express this ok.
is it reasonable to have the feed and the heat riser (sheltered) outside the house and run the exhaust pip though the home. I understand that you would forgo the radiant heat from the barrel but wouldnt' have the barrel in the home and you would still get the advantages of charging a thermal battery.