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Topic # 175419 29-Jun-2015 09:47 Send private message

I have both electric and gas running into my home ... with gas being used for hot water (Infinity system) and cook-top.

Electricity usage obviously varies with time of year (heaters in winter), lighting, clothes & dish washing, etc etc.

My gas bill, however, shows a very wide variation where I would have assumed, in a household of just two adults, it would be pretty even throughout the year?

Mid-winter months are double the summer months.

Since we on average take the same number/time for showers, and use the appliances that draw hot water much the same too, why would gas usage graphs show definite highs and lows?



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Stu

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  Reply # 1333191 29-Jun-2015 10:01 Send private message

Do you cook more hot meals in the winter? We tend to use the hob more often in cooler months and are outside with the BBQ or eating salads etc more in the summer.




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  Reply # 1333192 29-Jun-2015 10:02 Send private message

Could be a few variants at play to change it.

Market pricing (they change it based on supply dont they?)
Temperature expansion/evaporisation
Mixture of propane volume in the feed likely varies

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  Reply # 1333206 29-Jun-2015 10:18 2 people support this post Send private message

The temperature of cold water drops in winter, so to heat it to the same temp (60 degrees plus) takes more energy. Add in that people probably spend longer in hot showers when it's cold and more hot meals, this sounds perfectly normal to me.




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  Reply # 1333208 29-Jun-2015 10:19 Send private message

Cooking uses very little gas.

My guess would be it is the water heating as the incoming cold water can be much colder in winter.  You may also have the shower hotter due to cold bathrooms or be taking longer showers.

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  Reply # 1333212 29-Jun-2015 10:19 Send private message

timmmay: The temperature of cold water drops in winter, so to heat it to the same temp (60 degrees plus) takes more energy. Add in that people probably spend longer in hot showers when it's cold and more hot meals, this sounds perfectly normal to me.


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  Reply # 1333242 29-Jun-2015 11:25 Send private message

We have a similar set up to you, I think those suggesting that the water heating is the cause are correct. Infinity type water heaters use a lot of gas to heat the pass through water, in winter the pipe temperature of the water is colder therefore takes more energy to heat it. Add to that the ambient room
temperature etc and your hot water usage will be higher.




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  Reply # 1333282 29-Jun-2015 12:16 Send private message

Thanks for replies, they all make some sense.

Might check some of the theories with a gas expert wink

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