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General => Temperature Monitoring & HVAC Control => Topic started by: AgileHumor on March 15, 2014, 01:19:31 pm

Title: How to monitor/estimate cost for Gas (or any fixed output burner)?
Post by: AgileHumor on March 15, 2014, 01:19:31 pm
Much like the power arithmetic plugin (http://forum.micasaverde.com/index.php?topic=15840.0) for watts/KWH, has anyone tried to estimate the cost of natural gas in an HVAC unit and want to share?

I assume it could be done measuring the HVAC heat time total duration in a month which I can do in Excel and the EventWatcher or DataWatcher plugin...and match that to my billed amount to get Total gas used matched to geat time for the billed amount.   Total HVAC Heat Time / Billed Amount (for verified meter reading).

Kind of a "Current Cost" device.

Thanks!

Title: Re: How to monitor/estimate cost for Gas (or any fixed output burner)?
Post by: BulldogLowell on March 15, 2014, 07:23:57 pm
your furnace and water heater should have a rating in BTU/hr. and natural gas is about 1000BTU/cubic foot so you can estimate its consumption based on hours burned.  Also, if you consistently use the high setting on your clothes dryer, you could count its hours used also, knowing its maximum BTU rating.

the problem would be a gas cooktop or oven or outdoor grill for which you cannot likely capture the usage electronically.

Is that what you are looking to do?
Title: Re: How to monitor/estimate cost for Gas (or any fixed output burner)?
Post by: AgileHumor on March 15, 2014, 11:55:35 pm
More like the power arithmetic plugin, but would use time heat mode is set * X amount of gas used per minute the heat mode is active. 

I've gone through the app store searching and it looks like I'm out of luck for an existing solution.
Title: Re: How to monitor/estimate cost for Gas (or any fixed output burner)?
Post by: BulldogLowell on March 16, 2014, 12:08:29 am
maybe you could rig an optical sensor on your meter