To sell them you would need to have proper safety tests done.  In fact i wouldnt build a DIY one without a safety test, especially if youve modified the pressure vessel in any way structurally.

Also who would you sell them too?

The DIY market has no real need for autoclaves whith out of autoclave pre-pregs being available now.   Unless its dirt cheap, I can't imagine most DIY'ers being able to financially justify an autoclave for the amount of parts most people make.

Even small business it's hard to justify over using an oven.

Plus you said its 1.2m wide? by 1.5 m high? whats the internal dimensions as that doesn't seem that big and you might struggle to get a lot of car body panels in there especially as cars these days are quite big.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

so warren what you can suggest as a build? as mainly i want to pre preg wings and hoods. normal autoclave used 180.000 asked from me i do for sale for 20-30.000

You don't need an autoclave though if you want to use pre preg, just use an ooac pre preg and build an oven

£20-30k is still a lot of money.  Certainly beyond the "normal" DIYer and small business.

Unless you have some specific requirement that NEEDS pre-preg then i wouldnt recommend it for larger panels when resin infusion is good enough.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant