@@Roodoo55 a mixer tap would mix hot and cold, but you’d have to adjust it as the water in the tank cooled. A thermostatic mixer would do this automatically, and reduce water wastage and increase safety-no chance of 80 degree water coming out of the tap!

@@bobilvans4205 instant hot water. My van is literally going to be posher than my house.

@@MrTemzi it won’t boil-that’s what glycol is for, it has a much higher boiling point than water.

@@bobilvans4205 But what about the water heater radiators behind it? I'm planning a similar system so that's why i'm asking for info🙂. I was going to order you'r electronic valves to use with a thermostat, mut you don't seem to sell those anymore.

@@MrTemzi we have an automated diverter as part of the kit. Without this and the smart controller there may be safety implications.

@@bobilvans4205 ok thanks for the info!

@@ih2530 the threads are 1/2”

@@ih2530 just on the inlet. There is a bit of pressure build up but that’s why there is an expansion tank, it massively reduces the increase in pressure to protect the pipes.

@@simplyboating4609 yes the expansion tank is included, we just haven’t fully updated our website.

@@ih2530 only the inlet and outlet John guest fittings and the valve, everything else is included!

@@bobilvans4205 Thanks! Also for people reading this, at 9:17 you also mention the John Guest pipe inserts. So it would be good to buy those as well

@@chblabah we’re working our way through it! Yes you can upgrade, it’s just the new exchanger, hoses, clips and the plumbing unit and expansion tank. Just send us an email and we’ll figure something out.

@@neilalexander2406 any purchase from around a month ago will be the new system 👍

@bobilvans4205 Thanks, order in shortly !

it's fine

@@sp6ml we’re engineers, not sound technicians!

Sorry to hear that Gary. Can we answer any of your questions via the written word!

Yes you can add insulation if you so desire, just leave space for the brackets when applying.

Sometimes try power cycling after programming to reset the logic

@@bobilvans4205 how is that done?

You can’t use a VSR for lithium batteries which is the point of this video.

It can!

@@bobilvans4205 im keen to get a smart controlled sysem in my caravan, air heated and tanked with the element as a dump load for my solar and wind charge controller

I think I cut around 200mm off the Autoterm one. You can push the tube to the tank bottom to measure it.

You can add extra fittings as the tank has an access hatch so you can get your hand in if necessary!

@VicRol67 moi pour mon Ducato L2, je cherche un réservoir à peu près du style de la vidéo introuvable en France. Vous connaissez un site de vente à l'étranger?

I really don’t understand this comment I’m afraid. All of the testing in this video is done with exhaust gases which originate from atmosphere, not from the cabin. The moisture comes from the combustion process. It was also not a particularly cold day so we weren’t heating air which was sub-zero or anything so the burn chamber temps wouldn’t have been particularly affected.

Because this was a one off test, rather than a full installation and building things takes time. I have another video using an egr cooler which is basically what you’re suggesting.

@@bobilvans4205 Thank you. Look forward to seeing it.

I will mention that the point of the video wasn’t really about the origin of fossil fuels, it’s about heat reclamation from exhaust gases.

Not sure I agree. The aim is to reduce the temperature of the air coming out of the exhaust as much as possible. The colder it is, the more energy has been transferred. By running the pump slower you increase the exhaust temperature which isn’t good. The key is the amount of energy that has been transferred, not the temperature.

@@bobilvans4205 It may seem counter-intuitive but hear me out. You want the EGR cooler to absorb as much heat out of the exhaust gas as possible, to do that, the water (your heat transfer medium in this case) needs to spend as much time as possible inside the EGR cooler so that it can absorb that heat. A high flow rate of water would be fine if you had a very long or large EGR cooler, but there's no space here for that with a small cooler, so the pump rate needs to be reduced to give the water enough time. The reverse is true for the small radiator, slowing the flow of water through it gives the water enough time to transfer it's heat into the cores of the radiator, where the air stream can carry it away. This comes from experience of racing engines, where we tried various combinations of high-flow radiators and high-output water pumps only to find that what _seemed_ like the best combination (high-flow water pump impeller with a 3-core high-flow radiator) actually made the engines run significantly hotter, to the point where one of them literally seized from overheating even though the coolant temperatures weren't above ordinary. The coolant was passing through the engines so fast, it could barely pick up any of the heat from the cylinders, so what arrived at the radiator was a mixture of warm-hot slush that only became a homogenous temperature when it arrived in the radiator header tank. Dropping the water pump impeller back to a standard size dramatically improved the overall cooling and allowed the 3-core radiator to do it's job. Funnily enough but I just had a thought, you could do away with the whole water transfer setup all together and make a long coil of pipe inside a can, or one that loops back and forth like a direct heat exchanger. Running exhaust gas through that would directly transfer exhaust heat into the incoming air stream far more efficiently because you're no longer having to work with the limitations of water boiling off.

​@@bobilvans4205Yes, I agree. Recover the wasted energy in the exhaust gases. Given your data as presented you recovered around 50 btu/min (6.5 liters/min) with a delta of 2 ½ ⁰... Given your heaters energy input is about 200 btu/min I'd say that was good progress. Measurements of delta T across the EGR would be beneficial. I've had 2 of these Diesel heaters for around 7 years now and have purchased a auxiliary automotive heater to do the very same. All I need now is the EGR cooler.

No, it just heats the coolant off the diesel heater

It’s included in the kit

Hi, it doesn’t work with smart alternators I’m afraid. Ed.

No issues at all 👍