My Primus is a late-model No.735, made when Optimus had taken over the company but used the Primus name for a while. It’s pretty much an Optimus 510. Priming. Fired up. Catalogue entry for its Optimus 510 stablemate. Size/height comparison with other furnaces, left-to-right: Primus No.735; Primus No.85; Perfektus/Meva.
Hi John brilliant i Love those rocket stoves, i would like to get my hands on a plumbers London furnace with the Primus 702 burner
@gideon Each burner has the same output as a No.1 stove’s output in this table from @kerophile. So, that’s 2.8 x 4kw: 11.2kw, a fraction more than a Primus No.3 stove at 10kw and less than the single-burner No.85 (pictured above) at 16kw.
Yes indeed, for over a decade now, here firing a wok, my pal Henry doing the cooking - Good wok burner stoves.