Showing posts with label watts. Show all posts
Showing posts with label watts. Show all posts

Thursday, September 1, 2011

Watt Does This Use?

Question

I am trying to save electricity and wondering if leaving it on all the time or put it on a timer for 2 hours in the morning is better. I know it uses 900 watts. Right now I have the timer set to turn on one hour before I awake and one hour to turn off after drinking the coffee. I hope I make sense in this email.
Thank you,

Thomas


Answer

Thomas,

Not sure of the unit you have, although I will assume the unit has a blanket heater on the tank to reduce cycles on the control thermostat. The energy usage you would save would be the 35 watts of the blanket heater. We all pay for Kilowatt Hours (1000 watts on for 1 hour) at an average cost of approximately 0.06 dollars (6 cents) per Kwh. 35 watts on for 22 hours would consume approximately 0.77 Kwh/ 0.0462 dollars (call it 5 cents). At this rate 0.05 x 365 days would save $18.25. If the cost of the timer was $20.00, you break even in about one year.

Assuming the tank of water cooled to room temperature (75°F) after being off for 22 hours.

The 900 watt tank heater would be on for approximately 12 minutes to bring the water to 200°F. Costing about 0.012 dollars (1.2 cents). I will let you do the calculations from here.

Happy Brewing,
Dr. Brew

Friday, May 27, 2011

Always Ready for Great Coffee

Question

Have been using Bunn coffeemaker for several years. Need to add water to the preheated tank. How can we add two cups of water to have a full ten cups of hot water to fill coffee pot, instead of eight cups coming through?Can only four cups be made, or do we always need to make the full pot?

P.S. To settle an argument...

How much electricity does it take to keep the pot hot? I say more than keeping a night light on all day, my husband disagrees.
Thank you.




Answer

Your first two request can be answered pretty easily. The ground coffee absorbs/ retains approximately 2 ounces of brew water, per dry ounce of coffee used in the brew .

You can brew a half pot, simply use half the water volume and half to slightly more of the coffee weight than you normally do.

To keep the tank at brew temperature during idle times, and so its always ready to brew. The unit consumes approximately 35 watts per hour. Not sure how wins this one?

Happy Brewing,
Dr. Brew