Quick do quite a large range, what sort of size are you after, or is there anything special about it that means an off the shelf one won't work for you ?
Thanks. Quick? Mine is horizontal and measure 350 X 1000 approximately. Immersion boss in the end. Just a single coil job, with the standard foam lagging is all I need. Thanks
That's just an example of what Quick do, to show who they are, range available in loads of distributors, but I'm not saying which would suit your purposes size/capacity wise.
OR, is yours repairable, if it's just the heater element that may be replaceable ?
Norfolk Marine are the cheapest around that I could find when I bought my Surecal one in the earlier part of this year. Hassle free and very quick delivery. Recommended.
I have a Surejust twin coil calorifier plus mains immersion heater, so the options are engine heating, Webasto heater or mains if alongside.
A major difference about the Surejust is that it uses copper for the heating coils whereas some use stainless steel, which is poor at heat transference. I get hot water at the tap within a few minutes' running the engine.