I have a need to use or acquire a new covection oven to dry some water
saturated components.  It is necessary to use electrical heating
elements to do this drying due to the absence of natural gas at its
intended location.  I wish to reduce my electricity usage in an
attempt to reduce the power costs.  Are there any electrically heated
convection ovens available with a built-in heat exchanger(s) which
takes the heat out of the humid exhaust air and puts it into the cool
intake air?  I know that separate air to air heat exchangers can be
purchased, but I want to find a commercial/industrial oven with system
already built in.  My oven with have an interior space of about one
cubic meter.  A satisfactory answer will include the contact
information for at least one manufacturer or distributor of such an
oven in the US.

In Europe a lot of people use efficient ventless condensing clothes
dryers for drying laundry.  Of course you probably don't want the
tumbling action.  But sometimes these dryers have an accessory
shelf/rack allowing you to lay out a delicate jacket or sweater and
get pure convective drying.  That would probably make it work for your
application.

Or, you can buy a condensing clothes dryer and snip the drive belt, if
you prefer.

Search google for condensing dryers and a lot of products show up. 
And when you're done with your project, hey, you have a valuable
clothes dryer.

As far as I know, Kenneth Technology import such products from the
German company Votsch. You can visit their website at www.v-it.com.
They manufacture humidity controlled thermal chambers and some models
feature energy recovery. It may be best to directly speak to Kenneth
Technology as the Votsch website is in German!
 Kenneth Technology  
 9 Bacorn Road  
 Flemington, NJ 08822-3211  U.S.A.  
 Tel.  (+ 1-908) 237 14 00  
 Fax (+ 1-908) 237 14 01  
 email  kennethtech@erols.com