Free Hot Water from Waste Exhaust Gas Bottle Heating Home Diesel Oil Heater Waste Heat EGR Burner 

Throw in a few spuds, some veg, and some cubed beef into a zip-top poly bag in the morning, and season to taste. Bung it in the water, then by midday add gravy thickening and an 'Oxo' (other stock cubes are available). Slow-cooked tender beef-stew while you work! 😋😋😋

Would the plumbing be more effective if the exhaust entered the tank low and exited high? Less loss of heat and better use of convection maybe?

I like your idea for putting a diverter pipe before the water heater. Instead of pooping it straight out though, you could run it to your radiator. Then you could turn the water heater off but retain the free heat.

Brilliant experiment Get it turned on full blast 👍

Old oil barrel for a bath? Great vid again andy 👍

You can also use a natural gas water heater and use the exhaust as the burner once it is sealed and vented to outside.

I like what you have done here, I bet you could adapt this to a larger water heater using a stainless steel heater coil similar to what is used in hot water pressure washers. Even if the heater was set on a low heat setting, it would soon heat up a water tank over the course of a few hours. The water tank could be further insulated by adding a jacket so i bet the water would heat up quicker and maintain temperature. Who knows... maybe the water could be pumped around a series of radiators?

Good one, seemed to be the best working so far! I like the simplicity, could be done with a much bigger container like an oil drum or central heating tank. 😎👍

Excellent as ever Andy, Have you thought .... You have the heater in your box outside and all that exhaust gas is wasted. Have you thought of using this gas bottle but lagged and pipes to a radiator in your home with the 12v caravan pump?

I was speaking of old gas hot water heaters or radiators - in the US there were many farmers who still had farm light plants --' They had 16 two volt cells for house batterys - most were 7 kw light plants - They charged the house batterys ever friday - the exaust from the generator went in the bottom of the flue pipe of a old gas water heater and heated water to shower and wash clothing on friday - 32 volt Dc farm light plants were very popular in the US from about 1890 to 1960s befor rural electrification in the US -

Great video as always - The outside set up is brilliant. Have you got some pictures of the box before the heater went in ? and what box did you use. Just trying to look at a different setup to mine as its in a plastic outside garden box. Thanks

Hi Andy, I’ve thought of doing the very same thing with a Y-Section on the exhaust, then put an electric diverter valve after one of the Y-Legs to stop the heat from the exhaust that would be heating the water once the water got to a certain temperature. The hot water would be pumped through radiator/s to heat room/s up, obviously if it’s a sealed system you would have to have a pressure relief device on the water side, or make it an open circuit with a header tank. As your already set up with your channel it would be good to see you tackle this type of experiment.

Great work again Andy, I'm not sure where you go from there. Interesting idea about concrete, i wonder if there is any online research comparing heat storage in water verses concrete verses sand verses natural stone etc.

You can use a tank type gas hotwaater heater - just make a plate for the bottom of the fllue and a choke or.damper for the top of the flue - They work well enought but rexover slowly -

What u can do is plumb in a toilet tank at a higher location, drive the exhaust pipe into the water reservoir and out again, plumb a mains water pipe into the inlet, so, it will always fill up as the level gets down and another outlet to go into your house/kitchen, you then have hot water in the sink all the time.

The steel pipe will corrode in the water, the inside also unless it’s stainless steel. I’d be tempted to get a ready made heat exchanger for the exhaust.

Absolutely fantastic. Again, I love these experiments 😀. The only thing that worries me is the added backpressure. If that is going to damage the heater over time? Other than that this is probably the best I have seen so far to utilise the exhaust heat. Next step maybe to pump that water through a radiator to bring that heat back into the room. 😃

Hey Andy, I have mine installed and I am mucking about with the tailpipe outside. But after running mine outside for a few hours and then in the shed (16x10) I noticed a "smell" not Co but I have determined it is from the heat outlet hose. I removed this hose and it was way cleaner. I have since picked up some 3" semi-rigid aluminum vent hose. and a skinny hose clamp. This aluminum hose heats up fairly high.... But my brain has been thinking about the x4 45mm hose cap they make. Every one is playing with the heat recovery from the obvious source "Exhaust". So I will throw you a idea would love to see someone work with. (off work at moment so no "expendable funds" or I would do it.) I was thinking one could do a "poor mans heated floor" by routing the one or two of the 4 outlet hoses through a raised floor. I was thinking pallets. Then finally vented out the "step" into the shop. This would be for the back area where I spend most of the time at the laser or the drill/mill. Could you run it into conduit and have it radiate just enough to heat the feet? Or would EMT have a smell or chemical to be concerned about? Then I guess the next step is doing the heat exchanger trick to heat a 50/50 mix of water and antifreeze. Since this will not be heated constantly. Need to find a small holding tank with a pressure release or some sort. Car rad is little to big, but would also act as a heat source. Then run proper radiant heat PEX in a sub floor.... Toasty toes!!

That power supply might get damp in that box, it might be worth looking at ways to deal with the potential damp which cause it to fail.

I refer to my previous message about putting some stones or sand in the bottom to retain the heat and keep the water hot for an extended timeframe

Have you thought about a towel radiator? No idea if it would work but might be good for drying towels if it does?

Hello Andy, that epoxy resin, how much heat will it take, will it cope with the exhaust,

Over the past year what is your best exhaust recovery? I liked the radiator and was something I was thinking to implement, but what would you recommend?

Try in concrete, it will retain the heat longer.

I'm still got plans for heating a large greenhouse with a 350 chevy engine burning natural gas while turning a 150kw electric stator then selling the electricity to the point that electricity becomes free, just needs 8 clients the motor and wire the green house is. why's that thing on the store shelf with the sticker say from Mexico... only the sticker was made their...

Sand battery ?

It looks like one little nudge and the heater would fall over..

P r o m o S M