Lawrence (Larry) Clark, CEA, GGP, LEED AP O+M

Lawrence (Larry)
Sustainable Performance Solutions LLC, Fort Lauderdale, Fla.
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A member of HPAC Engineering’s Editorial Advisory Board, Lawrence (Larry) Clark, CEA, GGP, LEED AP O+M, is principal of Sustainable Performance Solutions LLC, provider of energy audits, general energy-efficiency and sustainability consulting services, and metering and submetering solutions. He has more than a dozen published articles on HVAC- and energy-related topics to his credit and frequently lectures on central-energy-plant optimization, metering/submetering, and advanced ventilation.

What Owners Need to Know About ... Green-Building Rating Systems 
With so many choices, it is important for facility owners to have at least a nodding familiarity with the various building rating systems. This article takes a look at LEED, Green Globes, ENERGY STAR, and the Living Building Challenge.
Reducing Energy in Older (Not Just) Health-Care Facilities
Lighting, HVAC, and hot-water heating account for 60 to 80 percent of the electricity and even more of the natural-gas consumption of hospitals. Given the number and size of these facilities throughout the United States, modest improvements in efficiency can save a great deal of energy resources.
Leveling the Playing Field of Green Products
In a 2010 survey of chief executive officers worldwide, 93 percent of respondents cited sustainability as critical to the future success of their companies, with 91 percent saying their companies would employ new technologies, such as renewable energy and energy efficiency, to address sustainability issues in the ensuing five years. That is the good news. The bad news is that many promising new products and technologies are having a difficult time making it onto the radar of specifiers and purchasers.
The Benefits of Ice-Based Thermal Energy Storage
Is ice-based thermal-energy storage (TES) really green? Although the success of ice-based TES in reducing energy costs has been substantiated, there are differing opinions within the HVAC community regarding whether TES is a green technology.
Multiparameter Demand-Controlled Ventilation 
Long known to correlate with human metabolic activity, carbon-dioxide (CO2) levels are a reliable indicator of indoor pollution originating from building

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