Windows In Oven Doors
Are ridiculous, they waste far too much power and always get dirty and few people use them anyway, they still open the door and peek.
One of the reasons that this FD electri-clean oven had one of the best cleaning and baking performances EVER in an oven was the lack of a window.
Behind the inner porcelain door panel of this range was a 1/4" thick plate of alluvium [ don't tell donald ] this allowed great heat transfer over the entire inner door panel to even out cleaning and baking temperatures as well. Ever square inch of these FD EC ovens would clean perfectly.
GE, HP, Thermador and Roper-Kenmore SC electric ranges achieved much the same good cleaning effect with an additional heating element under the front edge of the oven liner, and on GE-HP P-7 ovens they even used this additional mullion element during baking to make up for any unevenness cause by heat losses near the door opening.
This was not only great engineering but ranges from this time period used far LESS energy than these new ranges do today as well as pre-heating faster and baking better as well.
John L.