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[Oberon]

Greetings all,

So if you cook at high heat in a conventional home oven you know the woosh of searing heat that rushes out when you open the oven door.  Also, notice how brick ovens commonly oven space ABOVE the top of the oven door...hmmm...so I am thinking about (and just starting to devise some plans for) creating a 'heat dam' or a lip across the top of the front of the oven interior, speculating that it might prevent at least some of the hot air at the top of the oven rushing out when opening the door.

Has this been addressed before (please point me to the thread)?  Anyone try something like this out?  Recommendations?

Thanks much...

[pacoast]

It's a good idea & while it won't be a panacea, it should help. It is important for both heat retention and drafting in brick ovens. Heat rises, with the hottest air typically being at the top (dome) of the oven. So if you build the "heat dam", not only is your effective door size reduced but you are mostly losing the (somewhat) cooler air at the bottom of the oven.

A conventional home oven doesn't have the thermal mass to make to achieve the thermal dampening seen in brick ovens, so the effect won't be as large. But at a guess I'd say it's significant enough to be worthwhile. Don't let your dam interfere with the door gasket though or you will probably negate the improvement.

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[Oberon]

Nice feedback on the rationale...and thanks for reminding me of the concept of "effective door size" - I'd forgotten that since I haven't read "The Breadbuilders" in a while...

Now about the design...I'm think pretty cheap and low-tech at the moment: using very heavy gauge wire (no coating) to build a frame that fits inside the perimeter of the top/front of the oven, and that fits tightly enough to remain in place when set (or else I'll rest it on one of the racks in the top slot), then I would use good old foil to wrap around that frame and fit it in place.

Other thoughts?

[pacoast]

If it were me, I'd just take a piece of sheet metal and install it with clips, so that it's removable. Or possibly with a hinge if there isn't a broiler element on the roof of the oven to interfere. If you have access to a mil or university surplus store, you might be able to get a metal curtain that slides up & down. Lots of ways to implement an idea like this.

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[Jack]

How about just using more oven mass to speed up the temperature recovery?  I use two Fibrament stones in the oven when I need to cook more than three pies in quick succession.

Jack

[ThunderStik]

Jack has the right idea. I dont think any sheild or anything like that will hgelp the cause. I throw in a big cast iron skillet and another stone.

[Oberon]

I actually like to sheet metal option and will borrow my friends tin snips soon.

I tried a foil wrapped around the front of a rack on the top level and fitted around the opening last night.  I didn't have the capacity to track the temp, and didn't notice much difference in cooking, but I didn't get the same blast of hot air coming out when I opened the door.

[ThunderStik]

If you are trying to hold the heat in its not going to happen. If you are trying to divert it from your face then that is possible with a sheild of some type.