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2. Flat rate - Wikipedia

   en.wikipedia.org/wiki/Flat_rate

   A "flat rate" (more accurately known as fixed rate) for electricity is a fixed price per unit , not a fixed price per month, and thus different from that for other services. An electric utility that charges a flat rate for electricity does not charge different rates based upon the demand that the customer places on the system.

3. Cooling load temperature difference calculation method

   en.wikipedia.org/wiki/Cooling_load_temperature...

   The CLTD/CLF/SCL (cooling load temperature difference/cooling load factor/solar cooling load factor) cooling load calculation method was first introduced in the 1979 ASHRAE Cooling and Heating Load Manual (GRP-158) [1] The CLTD/CLF/SCL Method is regarded as a reasonably accurate approximation of the total heat gains through a building envelope ...

4. Volumetric pricing - Wikipedia

   en.wikipedia.org/wiki/Volumetric_pricing

   Volumetric pricing requires metering that can be expensive to implement, especially in the case of irrigation, alternatives include: [2] [3] [4] flat rate; per-area pricing, coupled with tiered pricing; a system of water rights or quotas; input pricing as a percentage of the cost of certain input(s), e.g., seed;

5. Utility ratemaking - Wikipedia

   en.wikipedia.org/wiki/Utility_ratemaking

   P(t) is the price in time t. RPI is the rate of inflation. X is the efficiency factor (X-factor). P(t-1) is the price in time (t - 1). Since the price is set with regard to the overall inflation rate (RPI) and required growth of efficiency (X-factor), such kind of regulation is also called RPI-X regulation.

6. Heat recovery ventilation - Wikipedia

   en.wikipedia.org/wiki/Heat_recovery_ventilation

   Diagramatic operation of a thermal wheel Ljungström Air Preheater by Swedish engineer Fredrik Ljungström (1875–1964). A thermal wheel, also known as a rotary heat exchanger, or rotary air-to-air enthalpy wheel, energy recovery wheel, or heat recovery wheel, is a type of energy recovery heat exchanger positioned within the supply and exhaust air streams of air-handling units or rooftop ...

7. When is the last day to ship for Christmas? Deadlines ... - AOL

   www.aol.com/last-day-ship-christmas-deadlines...

   Take advantage of "National Free Shipping Day" on Dec. 14 by checking to see if the retailer where you are shopping is participating. ... reuse old packing materials and use flat-rate boxes, which ...