Why is my natural gas furnace making buzzing sounds?

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I have a natural gas furnace and noticed that on an intermittent basis it makes a buzzing sound. At first the buzzing sound didn’t happen that often, but now it is happening more frequently.

The furnace will buzz for several seconds and then stop. Then at some random point it will buzz again for another few seconds. This only happens with the furnace is actually running.

The furnace is still producing heat. In fact, apart from the buzzing sound, it is working normally.


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How much natural gas would I use after converting from oil?

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I have a 40 year old house with an oil furnace. I know how much oil I use a year. Is there a conversion factor that would tell me how much gas I would use with a 90% and a 95% efficient natural gas furnace?


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I have a natural gas furnace but I want to use electric heat?

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What is better for the environment? I have a natural gas furnace, but in my area all of our electricity comes from hydro dams. So would I be better off using electric heaters to go more green? We have very cold winters and they last about 5 months. I am thinking of buying some plug in electric heaters, is this a good idea? I must confess that I also want to save money as our natural gas is going up in price this winter by 30%, would using electricity save me money?


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