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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. 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 ...

  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. Pay-per-click - Wikipedia

    en.wikipedia.org/wiki/Pay-per-click

    However, in many cases, advertisers can negotiate lower rates, especially when committing to a long-term or high-value contract. The flat-rate model is particularly common on comparison shopping engines, which typically publish rate cards. However, these rates are sometimes minimal, and advertisers can pay more for greater visibility.

  6. FedEx Express Launches Flat-Rate Shipping - AOL

    www.aol.com/news/2013-10-21-fedex-express...

    Today, FedEx announced FedEx One Rate, which gives customers a flat-rate option for shipping their express packages, depending on the size of the package (not the weight) and the shipping method.

  7. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    The HVAC industry was historically regulated by the manufacturers of HVAC equipment, but regulating and standards organizations such as HARDI (Heating, Air-conditioning and Refrigeration Distributors International), ASHRAE, SMACNA, ACCA (Air Conditioning Contractors of America), Uniform Mechanical Code, International Mechanical Code, and AMCA ...

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