Ashrae 90.1 lighting power density
Otherwise, proper use of the table is in the fine print. First, one must read the accompanying text as separate requirements and options applicable to the table, not a consecutive list of actual requirements. The table was developed to simplify reading and reference of LPD and control requirements in each space, but, at first glance, it may appear confusing. The primary change is a new table (Table 9.6.1) format for determining LPD allowances using the space by space method and minimum mandatory control requirements using either the space by space method or building area method. “The savings can be substantial, and it will, in many cases, be advisable to seek some knowledgeable guidance to make the controls application as simple and seamless as possible.” “ASHRAE/IES 90.1 2013 requires more lighting control, and it can be difficult to plan for,” Richman said.
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“Mostly, it’s all about controls and simplifying how to determine requirements,” said Eric Richman, senior research manager for the Pacific Northwest National Laboratory and chair of the 90.1 Lighting Subcommittee.įirst, let’s look at LPD values, most of which were adjusted. The major changes to ASHRAE/IES 90.1 2013’s Section 9 (lighting) include more stringent lighting control requirements, adjusted lighting power densities (LPD), and a new table format for determining lighting power and control requirements in individual spaces. ASHRAE published the latest version in October 2013, but many states will adopt the 2010 standard. The standard, which applies to new construction and major renovations (including requirements for lamp-ballast retrofits), is updated every three years.
#Ashrae 90.1 lighting power density code
The Department of Energy recognizes the 2010 version as the national energy reference standard, and the International Energy Conservation Code recognizes 90.1 as an alternate compliance standard. ASHRAE/IES Standard 90.1 provides states and other jurisdictions a model commercial building energy code.