Two of these and it’s done?B&Q
Ha! 2000W? I thought we were building a furnace! These are too small in dimension (and have bad reviews). I emailed the manufacturer for advice on the jacketed ruby 350mm at 1000W each. We could however use 4 smaller tubes like these. It’s cheaper to buy them separately and I think I have seen reflectors too for the smaller sizes. I’ll look for an alternative arrangement that fits the dimensions.
1 Like
But they do come with a reflector. And as far as the review goes we are only interested in two components.
could we not manufacture the reflector? surely it’s just a bent bit of (very thin) steel?
Yes , but it would save a few hours
The manufacturer of the 350mm 1000W lamps says they’ll be suitable for the temperatures we want to achieve. . They also do 370mm lamps, which will give us even better coverage of the 400mm x 400mm area. I have asked if they provide reflectors for either of these.
From the overall dimensions of the B&Q heater, I gather that the lamps must be at least 216mm. Two of them side by side, will push the width wider than 400mm. If we decide to adjust the overall size to accommodate this, then the manufacturer I’ve contacted definitely sells the lamps and the reflectors. I’d rather get those, than hack the B&Q heater.
Also, the bad feedback for the B&Q heater relates to the lamps themselves failing very quickly and apparently people are saying you can’t get replacements. This sounds a bit strange, but I wonder if they are custom size and not the readily available ones.
I’ll update you when I hear back regarding the reflectors. It will definitely save us time and effort to get them ready than making them.
Fair point well made
Back to plan A 
1 Like
370 mm that sounds perfect.
Thin sheat of staneless steel and 3 lamps and we are in business
How are you planning on controlling it? Mechanical timer, themostatic?
That’s probably the main way you’d limit the “it might catch on fire” risk, past building it sensibly…
I’ve a thermocouple and a controller at home, which should do the trick.
1 Like
Pluss a over temperature stat and a timmer
All of the above