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Question:

Is it better to cover the roof fan vents over winter to help keep the heat in?

I just put bag over the vents and noticed that other had not done soThat made me second guess if covering them was usefull.

Answer:

no, better to have circulation in atticsYou could add more insulation, though.
The Older electric blankets used to run on line voltage lasted several yearsNow a days they are low voltage lucky to last more than 1 yearIt is called Planned ObsolescenceAlso now they use a 10 hour timerI built a photocell operated device 30 years ago am still using it.
Planned obsolescence is a conspiracy theorists concept of evil corporations raping consumersThere never was any realistic instance of design to self-destruct within a time spanReliability is a consumer's biggest demand, and companies that provide it are the ones that do the largest businessIn order for planned obsolescence to work, a new product must be more desirable so that consumers are willing to dispose of the old oneAverage lifespan is hard to say, much like cars or TVsSo much depends upon care and conditions of usageYou should get an easy 5 years out of it, if not 10 or moreAgain, it depends upon careWires can break if folded too tightly or washed too often, etcI tend to use a sheet between my body and blanket to reduce the actual washing cycle, and use Fabreze disinfectant and hanging on a line to periodically refresh it.
Mine have only lasted through 4 winters before they stop getting warmThanks for the info, Randy.

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