Last month at LightingControlsAssociation.org, we published an article about how to establish daylight zones in sidelighted (windowed) building spaces. We looked at an industry rule of thumb and then how the latest generation of energy codes and standards address it. In review, when designing an energy-saving daylight harvesting control system, a critical decision is to […]
When designing an energy-saving daylight harvesting control system, a critical decision is to establish lighting control zones, identifying lighting loads to be separately controlled. Before this decision can be made, however, we must first determine the daylight zones. A daylight zone, also called the daylight area (expressed in square feet), is defined by the ASHRAE/IES […]
As demand for lighting controls continues to grow, advanced solutions are becoming increasingly specified while also becoming increasingly sophisticated. This increasing sophistication translates to greater owner benefit but can also pose greater risk of design and installation mistakes. In a perfect world, designers create clear and detailed lighting control requirements that are easily installed by […]
Because of the strong energy savings potential offered by daylight harvesting, coupled with advancing technology, codes and standards are now beginning to address daylight harvesting—specifically, International Energy Conservation Code (IECC) 2009, ASHRAE/IES 90.1-2010, ASHRAE 189.1 and Title 24-2008.
Last month, the Lighting Controls Association published a guide to the new ASHRAE/IES 90.1-2010 standard, focusing on its prescriptive lighting power requirements as well as significant changes to its scope and administrative requirements. In Part 2 of this series on the new standard, we will focus on its extensive new mandatory and optional lighting control requirements. Regarding controls, the changes are nothing short of historic.
ASHRAE/IES 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings is published every three years to provide states and other jurisdictions with a model commercial building energy code. The 2010 version, published November 2010, represents the most dramatic revision of the standard since 1999. In this two-part series of special reports by the Lighting Controls Association, we will examine the new energy standard in detail. Part one, presented here, focuses on changes to the prescriptive lighting power requirements as well as changes to scope and administrative requirements. Part two, to be published next month, will focus on the standard’s extensive list of new mandatory and optional lighting control requirements.
To help achieve the PlaNYC goal of a 30% reduction in greenhouse gases by the year 2030, on December 9, 2009, the New York City Council enacted ambitious legislation targeting energy consumption in buildings. Recognizing that 85% of the buildings that exist today will still be in use in 2030, the Council is focusing on existing buildings. New York’s 22,000 largest buildings, concentrated largely in Manhattan, account for roughly 45% of total floorspace and energy consumption, and were specifically targeted by the legislation to make the biggest impact for the smallest amount of government intervention.
The big news is that ASHRAE 90.1-2010 has been published. It represents a major leap in evolution of the energy standard; it’s basically almost an entirely new standard. Lighting controls play a starring role. Here is a summary of lighting control-related changes that caught my eye at first glance.
Code authorities are considering approaches to energy codes that are performance based instead of mainly prescriptive. In a performance-based code, the building would be designed so that it would operate within a target limit for energy consumption—using annual kWh/sq.ft. instead of W/sq.ft. as the primary metric.
Green construction codes and standards are beginning to emerge on the national code stage. The standards go beyond energy standards such as 90.1 and the International Energy Conservation Code (IECC) to cover additional areas such as site sustainability, water efficiency, indoor environmental quality and materials and resources. The first is ASHRAE Standard 189.1, Standard for the Design of High-Performance, Green Buildings Except Low-Rise Residential Buildings, published by ASHRAE in January 2010 in conjunction with the USGBC and the Illuminating Engineering Society.