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2. Energy efficiency in British housing - Wikipedia

   en.wikipedia.org/wiki/Energy_efficiency_in...

   In the 2006 regulations, the u-value was replaced as the primary measure of energy efficiency by the Dwelling Carbon Dioxide Emission Rate (DER), [19] an estimate of carbon dioxide emissions per m 2 of floor area. This is calculated using the Government's Standard Assessment Procedure for Energy Rating of Dwellings (SAP 2005). [20]

3. Home Energy Saver - Wikipedia

   en.wikipedia.org/wiki/Home_Energy_Saver

   The Home Energy Saver is built on DOE-2, a computer program for building heating and cooling energy analysis and design. [3] DOE-2 performs a thermal load simulation that accounts for heating and cooling equipment and thermal distribution efficiencies, infiltration, and thermostat management. [4]

4. Federal roofing tax credit for energy efficiency - Wikipedia

   en.wikipedia.org/wiki/Federal_Roofing_Tax_Credit...

   The federal roofing tax credit for energy efficiency is dependent on the cost of the materials used in the renovation. A consumer could only receive a tax credit of up to 30% of the material cost, up to a maximum of $1,500. This credit is for funds spent on the energy-star approved materials, not on installation or labor cost.

5. How Much Does it Cost to Replace a Roof? - AOL

   www.aol.com/lifestyle/much-does-cost-replace...

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6. HERO Program - Wikipedia

   en.wikipedia.org/wiki/HERO_Program

   The HERO Program is an energy efficient financing program in the United States. The name HERO stands for Home Energy Renovation Opportunity. The HERO Program is a Property Assessed Clean Energy (PACE) Program, which provides financing for energy-efficient, water-efficient and renewable energy products to home and business owners in approved communities within California and Missouri.

7. Water efficiency - Wikipedia

   en.wikipedia.org/wiki/Water_efficiency

   Water efficiency is the practice of reducing water consumption by measuring the amount of water required for a particular purpose and is proportionate to the amount of essential water used. [ 1 ] [ 2 ] Water efficiency differs from water conservation in that it focuses on reducing waste, not restricting use. [ 3 ]