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HDD
(redirected from Heating degree day)

   Also found in: Financial, Encyclopedia, Wikipedia 0.01 sec.
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HDD (Comput) abbr of hard disk driveFestplattenlaufwerk nt


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Add the heating degree days and cooling degree days, as Sivak’s study does, and you get an idea of how much energy is used year-round in the region.
The Verifier features a complex ultrasonic measurement system consisting of: a loop-powered ultrasonic sensor; a meter configured to produce an electrical indication when a predetermined volume of fuel passes through it; a rewritable memory for storing a look-up table to track the volume of fuel in the tank; systems of calculating and tracking heating degree days and oil consumption and issuing alarms as needed; and a system of remote monitoring for the fuel tank of the building.
Environment Canada lists the average degree days for Ottawa (1971-2000) as 4602 Celsius heating degree days <18[degrees]C (8284 Fahrenheit heating degree days <64[degrees]F) and 244 Celsius cooling degree days >18[degrees]C (439 Fahrenheit cooling degree days >64[degrees]F).
 
 
 
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