Alex Colchester

here is the PerfectBurn heating a hot tub

All PerfectBurn RMH are square!

Hi

We have developed a Rocket Stove water heater that would certainly heat your pool. It runs on wood pellets. Check out www.perfectburn.co.uk

Hi

A lot of the developments are innovative and so I am currently exploring some protection (maybe a patent application). Once this is achieved I will happily let those in the permies community know in detail the innovations for self-build purposes. Of course, anybody using these advances commercially would have to license the ideas off me.

Here is a burn demonstration of the second prototype (the one that has become my new product at www.perfectburn.co.uk )

here it is

https://permies.com/t/69707/Engineered-Modular-Rocket-Stove-Hot

Hi

Thanks for the response. Absolutely agree- a video is a great idea. Next time I have a hot tub I will post. Here is a video with a smokeless burn

Hey Anthony!

check out the next version of my design

would love your feedback

thanks

Alex

... And it is worth noting that our system heats 1000 litres of water from well cold to 39celsius in 3 hrs using 20lbs of wood pellets. Far less fuel than many of the previous posts are suggesting is required. I note someone saying thay needed 500lbs of wood!

Hi

We have solved using a rocket stove to heat a hot tub and our system is tested over a year with zero issues. Check out my threads.

There is a lot of misinformation out there, with people very sure that it is very dangerous to heat water with a rocket stove. The whole flash to steam/ 'boom squish' thing is way overstated. We put water in the direct flame path of the rocket at 1100F and see absolutely no problems. We have a safety valve fitted just in case, but it has never triggered in 1 year of using the heater at full rocket burn temperature. Also, the idea that the rocket becomes smoky due to the cold water is also untrue. We maintain almost nil smoke emission even after starting the burn and heating water that is very cold.

Of course, if you fill a container with water and seal it and put it on a heat source you will make a bomb and possibly cause serious injury. But that will be true whatever your heat source (rocket or otherwise) and is not a specific concern of rocket stoves.

We engineer our water heating tank to be extremely safe with the use of very large bore pipes (almost impossible to block unwittingly) and the use of a pressure safety valve (probably overkill, but best to be safe).

It would be great to have feedback from the permies community, but it seems that for some reason people aren't interested in my developments, perhaps because I am an outsider to the 'permies scene'.

Thanks for all feedback in advance

Alex

Hi

Our rocket heater has an attachment specifically designed for hot tub heating (thoroughly tested over a year). The stove is compact and can easily be carried by two adults. Check out my recent posts or www.perfectburn.co.uk

thanks