No-chill should work nicely in cold climates. Just remember to rescue your wort before it freezes!
Plastic wrap around the kettle/lid gap should help but some air will still get sucked in if there is any headspace at all. I would get one of the 5 gallon HDPE "cube" jugs. Fill it absolutely to the top with hot wort, squeeze the sides to expel all air, screw the lid down good. You can add hot water if needed, to bring up the level. Excess can be chilled normally and refrigerated, and added the next day. Or used for starter. The hot wort sanitizes the jug. With no air, the cooling wort won't pull a vacuum and if it did, the flexible sides of the jug would compensate. There are a few cautions. You want an extended boil time to drive off DMS precursors, so I am told, and there can be "interesting" results with mash bills heavy on pilsner malts. Hops bittering develops more strongly and you may want to reduce hops boil time. Currently I go 15 minutes on the bittering hops instead of the usual 60, and my total boil time is 90 minutes, sometimes longer if I think I am much over my mark.
Another trick I use is I pull a quart of hot wort for ice bath chilling, and use that for my starter wort. Since the wort in the jug will not be transferred to fermenter until the next day, I can chill that quart of wort and make my starter, and it is ready for war by the time my batch is in the BMB. So my starter is exactly the same as the wort I am pitching to.
Also, apparently since the wort is of course thoroughly pasteurized and the jug is sanitized, the wort can be kept in the jug for several days. I personally have not tried that. I am told that some guys just ferment in the jug but not sure exactly how they manage that, with no headspace. I suppose some wort has to be transferred out, or one heck of a blowout tube used! There are also collapsible bladder type no-chill jugs, and you could maybe brew a 3 gallon batch and have room for fermentation. A spunding valve would help keep the jug inflated and maintain headspace for the krausen. I haven't tried that though.
Here is the jug I am using:
5 Gallon Plastic Hedpack with cap + Free Shipping
www.amazon.com
And these look interesting.
Skip the chilling phase and just bag that wort! These hot fill bags can be filled with any liquid up to 212°F.
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