makes my head spin that "efficiency" is ANY concern to ANYBODY.
How can you possibly regulate efficiency????
Wouldn't it be better to just put a cap on how much energy a person can use, period? Isn't that the end goal? Is that next? I don't get why it wouldn't be. And I wouldn't be surprised to see it happen (with exclusions for government official's residences of course).
Residential New residential buildings 3-stories or less are required to meet an energy performance standard using the Home Energy Rating System (HERS). The HERS index rates each home on a scale where 0 is a zero-net-energy home, and 100 is a typical new home built in 2006. The HERS index has been in use for many years in programs such as: Energy Star homes, LEED homes, and by the Federal IRS to qualify homes for tax credits and energy efficient mortgages.
HERS ratings are performed by a „HERS rater‟, an independent certified building energy professional, working with the home builder.
HERS ratings are submitted to the local building code official in draft form at plan review and final form on building completion.
Stretch code exceptions: The stretch or base energy code is not triggered in the following situations: Storm windows added to existing windows Window repairs to an existing sash and frame Reroofing or residing over uninsulated roofs or walls where the sheathing is not exposed.
Requirements: New homes 3,000 ft2 or larger: HERS index of 65 or less less than 3,000 ft2: HERS index of 70 or less In multi-unit buildings, the unit size determines the HERS score needed.
In addition: Mandatory requirements of the base energy code (IECC 2009) Builders and HERS raters must complete the Energy Star Homes Thermal checklist. Requirements: Existing home renovations and additions Home additions and renovations have two options to meet the stretch code: Option 1) Performance path: whole house - HERS rating option Existing homes 2,000 ft2 or larger: HERS index of 80 or less Existing homes less than 2,000 ft2: HERS index of 85 or less Home additions less than 3,000 ft2: HERS index of 70 or less Home additions 3,000 ft2 or larger: HERS index of 65 or less In addition: 2 Mandatory requirements of the base energy code (IECC 2009) Builders and HERS raters must complete the relevant portions of the Energy Star Homes Thermal checklist.
Option 2) Prescriptive path: partial house option (HERS rater not required) Any portions of a building modified by renovation must be brought up to code, or insulated to fill open wall/ceiling/floor cavities whichever is less. Any new windows, doors or skylights must meet Energy Star 5.0 standards. Any new ducted heating or cooling systems outside the insulated space must be tested and meet a maximum of 4% leakage to outside. Builders must complete the relevant portions of the Energy Star Homes Thermal checklist. Commercial
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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