Gas for hob

Pilgrimphil replied on 17/11/2020 14:06

Posted on 17/11/2020 14:06

We are considering having an almost gas free motorhome built to our specification. 

We are trying to do away with the need for bulky Calor Gas cylinders or underslung LPG tanks. 

Thus the fridge/freezer would be a compressor type running on 12/240v and the heating & hot water would be powered by diesel. 

In order that we have some form of gas hob for emergencies, we thought that the combined unit such as the Thetford Hob 980 or 981 series might work. This is as fitted to the Wildax Elara and has two gas rings & an induction hob. 

We would only need a small gas supply for the occasional use of the hobs. 

We have a Cadac Safari Chef 2 that uses the 500g disposable threaded resealable gas cartridges [CA500]. 

Thus my question is whether, with the right connector/regulator, these cartridges could be used to power the two gas hobs on the Thetford unit on a very occasional basis? 

Of course, this might not be at all feasible but it is worth asking the question! 

I have asked the question of Cadac but have yet to receive a response. 

PilgrimPhil

JVB66 replied on 17/11/2020 14:30

Posted on 17/11/2020 14:30

I would suggest a  camping gaz 907 or 904 cylinder  may be a more secure method of getting a gas supply to the hob for internal use ?

 ps the induction hob side  will need 6amp of your EHU and i think most leisure mains distributon boxes have 1x10amp and 2x 5amp trips

pps is this the second review of your convertion?wink

hitchglitch replied on 17/11/2020 15:55

Posted on 17/11/2020 15:55

I am curious about using diesel for the boiler and (possibly) the hob. It would be an unusual arrangement which I haven’t come across before. Is there any advantage over gas? After all, an underslung LPG tank is very compact and easily refilled. It should fit comfortably between chassis members just like the water and waste tanks.

As for using a gas canister, these are often used for barbecues so you could check the BTU of a typical portable one e.g. Weber (which lasts 3 or 4 hours) against the BTU output of your hob. 

Tinwheeler replied on 17/11/2020 16:10

Posted on 17/11/2020 15:55 by hitchglitch

I am curious about using diesel for the boiler and (possibly) the hob. It would be an unusual arrangement which I haven’t come across before. Is there any advantage over gas? After all, an underslung LPG tank is very compact and easily refilled. It should fit comfortably between chassis members just like the water and waste tanks.

As for using a gas canister, these are often used for barbecues so you could check the BTU of a typical portable one e.g. Weber (which lasts 3 or 4 hours) against the BTU output of your hob. 

Posted on 17/11/2020 16:10

The gas tank is easily refilled if you can find a dispensing pump, HG. Like you, we have a tank but I’d not have one from choice. I think Phil's aim is to save space and weight.

hitchglitch replied on 17/11/2020 20:25

Posted on 17/11/2020 16:10 by Tinwheeler

The gas tank is easily refilled if you can find a dispensing pump, HG. Like you, we have a tank but I’d not have one from choice. I think Phil's aim is to save space and weight.

Posted on 17/11/2020 20:25

I guess, but it’s the same weight just in different tanks. Easier to get diesel than LPG I suppose.

richardandros replied on 18/11/2020 11:53

Posted on 17/11/2020 15:55 by hitchglitch

I am curious about using diesel for the boiler and (possibly) the hob. It would be an unusual arrangement which I haven’t come across before. Is there any advantage over gas? After all, an underslung LPG tank is very compact and easily refilled. It should fit comfortably between chassis members just like the water and waste tanks.

As for using a gas canister, these are often used for barbecues so you could check the BTU of a typical portable one e.g. Weber (which lasts 3 or 4 hours) against the BTU output of your hob. 

Posted on 18/11/2020 11:53

Diesel fired heating is pretty much standard on yachts - either Eberspacher or Webasto are the best known brands. Indeed, I seem to recall my last Disco had a small diesel heater fitted.

Our last unit - a Webasto was an absolute pain on our last boat and I ended up shelling out over £2k for a replacement unit after numerous problems, caused largely by it running on red diesel.  That shouldn't be a problem in a motorhome, thoughwink

eurortraveller replied on 18/11/2020 12:49

Posted on 18/11/2020 12:49

The Prime Minister says I have to stop using a gas hob at home and use clean, green electricity instead. Is there to be a separate rule for motorhomers and caravanners, or will they have to get used to plugging into mains electricity on site and cooking that way too. Seems pretty simple to me. 

replied on 18/11/2020 13:01

Posted on 18/11/2020 12:49 by eurortraveller

The Prime Minister says I have to stop using a gas hob at home and use clean, green electricity instead. Is there to be a separate rule for motorhomers and caravanners, or will they have to get used to plugging into mains electricity on site and cooking that way too. Seems pretty simple to me. 

Posted on 18/11/2020 13:01

The prime minister does not say that you cannot use gas. He says that from 2025 there will be no gas supply to modern new build houses

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