OVEN CONSTRUCTION

[WELDER260]

I AM IN THE PROCESS OF BUILDING AN OVEN WITH FINAL INSIDE DIMENSIONS OF 4WX5LX6H.THE FRAME AND INNER SHELL ARE CONSTRUCTED AND I HAVE A FEW QUESTIONS FOR THOSE OF YOU THAT HAVE BUILT YOUR OWN OVENS OF THIS SIZE.I HAVE READ THRU ALL OLD POSTS AND THERE IS NO SPECIFIC INFO ON THIS.
1) WHERE SHOULD HEATER ELEMENTS BE LOCATED.
2)WHAT WOULD YOU RECOMMEND FOR AN AIR DISTRIBUTION SYSTEM IN OVEN.
THESE QUESTIONS HAVE BEEN ASKED BEFORE ,BUT NO SPECIFIC ANSWERS HAVE BEEN GIVEN,MAYBE SOMEONE COULD SHED SOME LIGHT FOR MYSELF AND OTHERS ON THIS SUBJECT. THANKS IN ADVANCE....JOHN

[BikerBill]

Welder,

I too am building my first oven, but mine will be gas.

This link http://www.coatings.de/manual/kap11-1.pdf
should help in determining the BTU's required to get your oven up to temp. Then use table 11-5 to figure out what size heaters to put in it. Nix all the formulas about chain weight, conv. speed and all that other stuff since this is not a conveyor and go straight for lbs/hr. because you will need more BTU's to heat the parts too. I think that should get you real close.

I will use a small squirrel cage motor on mine. I don't know, but I think if you were to circulate the air a few times per minute that it would keep the temps pretty consistent. I took a motor from an old food service convection oven at work and it is way too much air... I it would blow the dust right off the parts. Since you are going to install a convection fan in the unit I would put the heaters in the bottom of the oven to avoid any extra radiant heat from parts being to close to the elements.

Bill