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How long does a freezer stay frozen when the power goes out?

woodgears.ca

251–260 of 384 posts

Re: How long does a freezer stay frozen when the power goes out?

#251

Nitpick and fun fact: "we avoid opening the fridge and freezer to keep the cold inside." Technically, you cannot keep the cold inside because cold is a word for the absence of warmth (energy), so you're actually trying to keep the warmth outside. Words indicating the absence of something (cold, darkness, ...) are called privatives. h/t Terry Pratchett

Technically there is a mass of cold air that comes out of the fridge when you open the door. Keeping the door shot keeps this mass of air inside.

Re: How long does a freezer stay frozen when the power goes out?

#252

The location of the freezer or refrigerator is critical. If you live in a house that has a typical unfinished basement, don't overlook the advantage it offers. With one simple change, you can noticeably lower your electric bill, reduce your carbon footprint, gain extra kitchen space and improve your health. Just move your refrigerator to the basement. Since the basement is normally cooler than the upstairs, the refri…

Sounds like a good idea in theory, in practice though, nowadays very few people have a house with a basement like that anymore, unfortunately. I don't get it myself to be honest, it's more efficient use of the ground surface area a house occupies. I'd go with a chest freezer in the basement and a small fridge in the kitchen for frequently used / quick access stuff (milk, tonight's dinner ingredients).

Yeah, you don't really want to run down to the basement every time you want some ice cubes or cream for your coffee.

But that's more or less what I do. I have a (not small) fridge in the kitchen and an upright freezer in the basement. (I find chest freezers can become something of a black hole.)

When I had a 48-hour power outage recently, the freezer upstairs was pretty much defrosted--which was mostly fine because I didn't have perishable meat/fish up there. But the freezer downstairs was fine. (Made a point of keeping it buttoned up the whole time.)

Re: How long does a freezer stay frozen when the power goes out?

#253

Hi. Actualexperience here... it depends on the ambient temperature and how much stuff is in said freezer. So heres a data point: Freezer: normal upper level refrigerator freezer chock full of frozen fish caught on holiday in Alaska. Place, Time: Houston, TX, Late Summer, Hurricane Igor just hit and knocked our power out for 14 days. Findings: We kept the freezer shut and at about 4-5 days the fish was noticeably thaw…

Ice cubes always taste funny if used without good ice forms, absorbing the fridge odors. Use the ones with silicone cover. Not a hint of the freezer in the made ice.

Re: How long does a freezer stay frozen when the power goes out?

#254
post #182

A simple way to detect power failure induced thawing in a freezer is to store a paper cup about half full of frozen water in the freezer. By keeping a coin on top of the ice it’s easy to see with a quick glance if the temperature has risen for an extended period of time (possibly due to a temporary power failure or the door not being fully closed).

I keep a bag of ice cubes in the freezer for this purpose. If it’s a single cube the freezer went out.

Re: How long does a freezer stay frozen when the power goes out?

#255
post #182

A simple way to detect power failure induced thawing in a freezer is to store a paper cup about half full of frozen water in the freezer. By keeping a coin on top of the ice it’s easy to see with a quick glance if the temperature has risen for an extended period of time (possibly due to a temporary power failure or the door not being fully closed).

It is possible for the Ice to partially melt and the coin to not sink, the ice would need to COMPLETELY melt before this test would work, given the nature of ice it is possible for food to raise to an unsafe temperature while the ice is still melting

This "trick" should not be used in place of proper temperature monitoring

Re: How long does a freezer stay frozen when the power goes out?

#256
post #61

I bought and filled a chest freezer in pandemic preparations. Cost of the chest freezer: CAD 1,000 Cost to completely fill the freezer with good food: CAD 2,700 Given that, during a pandemic or a winter storm in Canada, a power failure can be a prolonged event... Cost of a good gas powered generator to keep the freezer viable beyond a day: CAD 1,000. This article seems to validate the generator purchase.

Problem is, freezers typically run 40% of the time. If you let it get up to -10C, the duty cycle will be a fair bit lower, but still quite high, while only drawing about 100 watts. But that's a lot of money to spend protecting food hoarding. Dry goods would be better for emergency cases.

The idea is more, if the freezer contains between CAD 1,000 and CAD 2,700 worth of food, how to keep it viable and not lose everything in a 1.75+ standard deviation power outage.

The generator is insurance, not a lifeboat.

Re: How long does a freezer stay frozen when the power goes out?

#257

Earlier quoted context omitted.

My three year olds can trivially turn the burners up, or pull the pans down.

that is a child problem not a stove problem

Ok? No one was debating which of those categories it fell in. In either case it's a "don't leave it unattended" problem.

Re: How long does a freezer stay frozen when the power goes out?

#258
post #253

Hi. Actualexperience here... it depends on the ambient temperature and how much stuff is in said freezer. So heres a data point: Freezer: normal upper level refrigerator freezer chock full of frozen fish caught on holiday in Alaska. Place, Time: Houston, TX, Late Summer, Hurricane Igor just hit and knocked our power out for 14 days. Findings: We kept the freezer shut and at about 4-5 days the fish was noticeably thaw…

Ice cubes always taste funny if used without good ice forms, absorbing the fridge odors. Use the ones with silicone cover. Not a hint of the freezer in the made ice.

Ooo nice, never seen this before.

Re: How long does a freezer stay frozen when the power goes out?

#260

The location of the freezer or refrigerator is critical. If you live in a house that has a typical unfinished basement, don't overlook the advantage it offers. With one simple change, you can noticeably lower your electric bill, reduce your carbon footprint, gain extra kitchen space and improve your health. Just move your refrigerator to the basement. Since the basement is normally cooler than the upstairs, the refri…

Sounds like a good idea in theory, in practice though, nowadays very few people have a house with a basement like that anymore, unfortunately. I don't get it myself to be honest, it's more efficient use of the ground surface area a house occupies. I'd go with a chest freezer in the basement and a small fridge in the kitchen for frequently used / quick access stuff (milk, tonight's dinner ingredients).

> nowadays very few people have a house with a basement like that anymore

It depends on where you live, and the type of ground underneath you. Where I live, everyone has a basement.

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