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  2. Zero-energy building - Wikipedia

    en.wikipedia.org/wiki/Zero-energy_building

    A Zero-Energy Building (ZEB), also known as a Net Zero-Energy (NZE) building, is a building with net zero energy consumption, meaning the total amount of energy used by the building on an annual basis is equal to the amount of renewable energy created on the site [1] [2] or in other definitions by renewable energy sources offsite, using technology such as heat pumps, high efficiency windows ...

  3. Cost estimate - Wikipedia

    en.wikipedia.org/wiki/Cost_estimate

    A cost estimate is the approximation of the cost of a program, project, or operation. The cost estimate is the product of the cost estimating process. The cost estimate has a single total value and may have identifiable component values. A problem with a cost overrun can be avoided with a credible, reliable, and accurate cost estimate. A cost ...

  4. Rain gutter - Wikipedia

    en.wikipedia.org/wiki/Rain_gutter

    Water falls towards a parapet gutter, a valley gutter or an eaves gutter. [12] When two pitched roofs meet at an angle, they also form a pitched valley gutter: the join is sealed with valley flashing. Parapet gutters and valley gutters discharge into internal rainwater pipes or directly into external down pipes at the end of the run. [12]

  5. Sustainable drainage system - Wikipedia

    en.wikipedia.org/wiki/Sustainable_drainage_system

    The EPA estimates that the average air temperature of a city with one million people or more can be 1.8 to 5.4 °F (1.0 to 3.0 °C) warmer than surrounding areas. [51] Higher temperatures reduce air quality by increasing smog. In Los Angeles, a 1 degree temperature increase makes the air roughly 3 percent more smog. [52]

  6. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    A round manhole cover of a given diameter has a smaller surface area than a square cover of the same width, thus less material is needed to cast the manhole cover, meaning lower cost. The bearing surfaces of manhole frames and covers are machined to assure flatness and prevent them from becoming dislodged by traffic.

  7. Water supply and sanitation in Singapore - Wikipedia

    en.wikipedia.org/wiki/Water_supply_and...

    Water and sewer tariffs were raised substantially in the late 1990s, so that the average monthly domestic bill including taxes increased from S$13 in 1996 to S$30 in 2000. [73] The sewerage tariff (called "waterborne fee") is S$0.30/m 3 for domestic users plus a fixed tariff of S$3 per "chargeable fitting" per month.

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