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PTAC Efficiency Specifications
March 1, 2009
What are the latest U.S. Department of Energy standards for packaged terminal air conditioners and heat pumps (PTACs and PTHPs), and are there any efficiency recommendations that go above the standards?
Content type: Ask E Source | Document ID: TAS-TN-3-09c | Author: Peter Criscione
Boeing’s Lean Energy Assessments
Low-Cost Measures Yield High-Value Savings
February 15, 2009
This Best Practice highlights procedures The Boeing Company uses to identify and take action on the “lowest hanging fruit”—the best opportunities for low-cost, rapid-payback energy savings in its 32 facilities comprising almost 74 million square feet.
Content type: Best Practice | Document ID: CEMC-BP-17 | Author: Spencer Sator and Gregg Eisenberg
BASs for Small Commercial Buildings
February 1, 2009
Are building automation systems (BASs) available for commercial buildings smaller than 10,000 square feet?
Content type: Ask E Source | Document ID: TAS-TN-2-09c | Author: John Sustar
Savings from Thermostat Setback
February 1, 2009
How much energy can be saved by setting back the thermostat in a typical home?
Content type: Ask E Source | Document ID: TAS-TN-2-09d | Author: Jessica Rivas
Lighting Controls
February 1, 2009
Controls that vary the time of operation and the intensity of electric lighting can cut energy use, reduce peak demand, improve occupant comfort, and increase productivity.
Content type: Resource Guide | Document ID: TAS-RG-16 | Author: Ira Krepchin
Small Gas Condensing Boilers
January 1, 2009
Residential-scale gas-fired condensing boilers (heating capacities of less than 300,000 Btu per hour) can provide efficient space and water heating in homes and small commercial buildings.
Content type: Resource Guide | Document ID: TAS-RG-14 | Author: Jessica Rivas
Hotel Room Automation
December 30, 2008
Lights and HVAC are the two biggest users of energy in limited-service motels. Available studies suggest a 25 to 44 percent energy-savings potential per room for automation products and can be used in virtually any hotel or motel to some degree.
Content type: Resource Guide | Document ID: TAS-RG-11 | Author: Peter Criscione and Ira Goldschmidt
Lighting Maintenance
November 30, 2008
All lighting systems experience a decrease in light output and efficiency over time—lamp light output decreases, dirt accumulates on fixtures, lamps burn out, and control systems drift out of spec or are overridden by occupants.
Content type: Resource Guide | Document ID: CEMC-RG-5 | Author: Ira Krepchin
Antifog Films for Refrigerated Display Cases
November 15, 2008
How well do antifog films work for refrigerated display case doors, and do they reduce energy use?
Content type: Ask E Source | Document ID: TAS-TN-11-08c | Author: Peter Criscione
Electricity Use of ECM Furnaces
User Behavior Plays a Critical Role
November 15, 2008
How much electrical energy from furnaces can be saved by using high-efficiency electronically commutated motors (ECMs) instead of standard-efficiency ones?
Content type: Ask E Source | Document ID: TAS-TN-11-08d | Author: Peter Criscione
Compressed Air Energy-Efficiency Programs
Results from an E Source Roundtable Discussion
November 1, 2008
Compressed air systems offer some of the most cost-effective energy savings available to the industrial sector. This report summarizes our August 2008 web conference with some of the most experienced managers of utility compressed air energy-efficiency programs.
Content type: Focus Report | Document ID: EDRP-F-27 | Author: Gregg Eisenberg
Estimating Retrofit Window Film Savings
October 1, 2008
How do I determine the energy savings from using a retrofit window film?
Content type: Ask E Source | Document ID: TAS-TN-10-08c | Author: Peter Criscione
Variable Refrigerant Volume Systems
October 1, 2008
How do variable refrigerant volume systems differ from traditional unitary air-conditioning equipment?
Content type: Ask E Source | Document ID: TAS-TN-10-08d | Author: Jessica Rivas
Lighting for Parking Lots and Garages
October 1, 2008
Well-designed lighting for parking lots and garages is cost-effective, efficient, and enhances the safety of drivers and pedestrians by directing light where it is needed, minimizing glare, distributing illumination evenly, and reducing light trespass.
Content type: Resource Guide | Document ID: CEMC-RG-2 | Author: Jessica Rivas and Ira Krepchin
Outlook for Power and Gas Prices: Fall 2008
October 1, 2008
Barring any unforeseen events, we expect Henry Hub prices for natural gas to remain in the $8.00 to $10.00 per MMBtu range over the next year. We project an average increase in North American wholesale electricity prices of 13 percent, with regional increases ranging from 4 to 21 percent.
Content type: Focus Report, Outlook for Power and Gas Prices | Document ID: CEMC-F-13 | Author: Neil Kolwey and Bill Horton
Market Status of Small On-Site Wind Power
July 1, 2008
What's the market status of small on-site wind technology for distributed generation?
Content type: Ask E Source | Document ID: TAS-TN-7-08c | Author: John Sustar
Burning Reclaimed Oil in Furnaces
July 1, 2008
What are the advantages and disadvantages of burning used oil in a furnace?
Content type: Ask E Source | Document ID: TAS-TN-7-08d | Author: Spencer Sator
Network Computer Power Management
July 1, 2008
Billions of kilowatt-hours are wasted every year by idle networked computers in offices, libraries, computer labs, and research facilities. Building managers and network administrators can significantly reduce computing costs if these idle machines are switched off.
Content type: Resource Guide | Document ID: TAS-RG-10 | Author: John Sustar and Spencer Sator
Energy Star Rating versus LEED Certification
July 1, 2008
Is there any connection between the Energy Star energy performance rating system and the U.S. Green Building Council's Leadership in Energy and Environmental Design (LEED) certification?
Content type: Ask E Source | Document ID: MAS-AskES-7 | Author: Gwen Farnsworth
Nighttime Curtains for Commercial Greenhouses
June 1, 2008
Greenhouses spend as much as 80 percent of their heating energy costs during the night, so there's great potential to save energy by installing nighttime curtains (also called shades, screens, or blankets) to help reduce heat losses. A good rule of thumb for estimating heating energy savings is to ...
Content type: Ask E Source | Document ID: TAS-TN-6-08b | Author: John Sustar
Energy-Use Benchmarks for Wastewater Treatment
June 1, 2008
Energy use in wastewater treatment facilities is typically measured in terms of energy used per gallon of treated water, or more commonly, kilowatt-hours per million gallons (kWh/MG). According to the Electric Power Research Institute, the 2003 national average energy use in wastewater treatment facilities ...
Content type: Ask E Source | Document ID: TAS-TN-6-08e | Author: Jessica Rivas
Impacts of Shading on Air Conditioners
April 1, 2008
Do outdoor air-conditioning units perform better when they're shaded versus when they're in full sun?
Content type: Ask E Source | Document ID: TAS-TN-4-08d | Author: Spencer Sator
Outlook for Power and Gas Prices: Spring 2008
April 1, 2008
Wholesale natural gas prices have increased by more than 40 percent since August 2007. Power prices are also increasing significantly due to accelerating natural gas and coal prices, obstacles to building new coal plants, and increasing construction costs for new generation of all types.
Content type: Focus Report, Outlook for Power and Gas Prices | Document ID: CEMC-F-12 | Author: Bill Horton and Neil Kolwey
Rooftop Units
March 20, 2008
A single-packaged air-conditioning rooftop unit (RTU) is a type of unitary air conditioner, a category that includes both single-packaged and split systems. RTUs are sometimes referred to as packaged units because they are self-contained.
Content type: Resource Guide | Document ID: TAS-RG-8 | Author: John Sustar and Peter Criscone
Data Center Virtualization
March 1, 2008
What is data center virtualization, what are its energy-efficiency benefits, and who can do it? Anything you can do to translate from IT language into English on this subject would be appreciated.
Content type: Ask E Source | Document ID: TAS-TN-3-08c | Author: Jessica Rivas
Wireless Hotel/Motel Room Energy Controls
February 1, 2008
What's the latest in wireless hotel/motel room energy control and monitoring systems?
Content type: Ask E Source | Document ID: TAS-TN-2-08c | Author: Jessica Rivas
Subsidized Energy Manager Programs
Energy Manager Salary Support, Training, and Tracking for Verifiable Energy Savings (Sometimes)
February 1, 2008
We look at two utilities that have created programs to reduce the risk of hiring an energy manager and to make the benefits more transparent. These programs provide financial incentives and guarantees to encourage large customers to hire an energy manager for a three-year term.
Content type: Focus Report | Document ID: EDRP-F-15 | Author: Gwen Farnsworth
High-Performance T8 Fluorescent Lamps
January 22, 2008
Fluorescent lighting technology has achieved new levels of efficiency, color quality, and longevity in a class of products called high-performance T8s. Most carry a price premium, but they are typically more cost-effective replacements for T12s than standard T8s.
Content type: Resource Guide | Document ID: TAS-RG-6 | Author: Peter Criscione
Daylighting Controls
January 8, 2008
Daylighting controls can avoid the common daylighting hazards of underdimming, overdimming and rapid cycling. This Resource Guide covers design and technology fundamentals and alternatives, economics, maintenance, efficiency, market information, and utility program models.
Content type: Resource Guide | Document ID: TAS-RG-3 | Author: Christie Rewey and Ira Krepchin
High-Bay Lighting: HID versus HIF
November 7, 2007
Metal halide and high-pressure sodium lamps have dominated the market for lighting indoor spaces with high ceilings. But high-intensity fluorescent light sources have improved significantly, making them the most cost-effective solution for most high-bay applications.
Content type: Resource Guide | Document ID: TAS-RG-4 | Author: John Sustar and Ira Krepchin
