• Lighting
• HVAC and Industrial Process Loads
• Compressed Air

• Bi-level stairway lighting - in New and Existing Facilities
  Many stairways are unoccupied most of the time. This bonus is available for stairway fixtures that have two lamps, and an occupancy sensor control - integral to the fixture - that reduces the fixture light output automatically when the area served by the fixture is unoccupied. This option is a particularly attractive option for new construction and for renovations that include fixture replacement. It builds on a recent manufacturing innovation. See the ESS Funding Calculation Worksheet for this measure.
  
  
• Daylighting control of interior lighting - in Existing Facilities
  "Daylighting" is automatic reduction in artificial lighting levels when natural light is available. In many circumstances, daylighting offers dramatic energy savings, particularly in facilities with well-placed windows or skylights. Utility support for daylighting increases motivation to explore emerging ballast and control technologies that will allow energy efficient lamps and ballasts to benefit from advanced control strategies.
  
  
• T-5 fluorescent lighting - in New and Existing Facilities
  T-5 fluorescent lighting has the distinct environmental advantage over T-12 and T-8 fluorescent lighting in that that the amount of pollutants used per lumen of light output is dramatically reduced, and the number of tubes is reduced by roughly 50%. The T-5 light source is highly concentrated so is particularly well suited to applications with high ceilings. T-5 fluorescent lighting offers better color rendition and controllability than HID.
  
  
• Permanently installed LED lighting - in Existing Facilities
  LED (light emitting diode) lighting is rapidly evolving and shows much promise for a variety of interior and exterior applications. This bonus applies to replacement or retrofit of fluorescent, incandescent, or neon with LED lighting for signage or decorative lighting. The highest savings for LED retrofits are typically found on red, green or amber signs that use tinted translucent panels in front of fluorescent tubes, or have continuous strips of red, green, or amber lighting. The long life of LED lamps tends to reduce maintenance costs as well. This measure does not include exit signs.
  
  
• LED lighting - in New Facilities
  The LED bonus is available in new construction only for exterior signage with programmed (automatically changing) messaging that utilizes only LED-type lamps.
  
  
• Replacing incandescent or halogen lighting with dimmable fluorescent or dimmable cold-cathode lighting - in Existing Facilities
  For compact fluorescents and cold-cathode lighting, the proposed equipment must have a power factor of no less than 90%, and a total harmonic distortion (THD) no greater than 33%. For four-foot fluorescent lamps, the proposed ballast must have a ballast factor not less than 95% and a THD of no more than 20%.
  
  
• Lighting fixtures with advanced local lighting controls - in Existing Facilities
  This bonus is available for fixtures that include, at a minimum, the following lighting controls integral to each fixture and capable of producing a separate lighting control zone for each fixture:
  • Occupancy sensor control that senses the area directly served by the fixture
  • Photocell sensor of light levels in the area directly served by the fixture
  • Personal lighting level adjustment control with separate input for the individual occupant of space directly served by the fixture
    
    
  In order to be eligible for this bonus, the fixtures must be installed directly over individual desk areas (producing a non-uniform lighting pattern), and the fixtures must communicate through a computer network to allow monitoring of fixture use and control of wider zones.

• Air-side economizers for data centers - in Existing Facilities
  Install 100% outside-air cooling capability in a data center to provide free cooling where outside air was previously provided only for satisfying the minimum ventilation requirements. Because data centers require air conditioning year-round, significant energy savings are realized by using outside air for free cooling.
  
  
• Electrically commutated motors (ECMs) for series variable air volume zone terminal fans
  Electrically commutated motors (ECMs) offer a higher energy efficiency and controllability than the traditional motors used to drive variable air volume zone terminal fans.
  
  
  1. Replacement of standard motors with ECMs - in Existing Facilities
     This bonus is available even if the ECM motor is operated at a constant speed.
     
     
  2. Automatic speed control of ECMs - in New and Existing Facilities
     This bonus is available for those who would like to go beyond the standard ECM installation, by adding automatic speed control of the ECM fan motor in a manner that reduces energy consumption below that of a constant speed ECM installation. The bonus is only available if the energy savings are achieved without reducing outside air ventilation levels during occupied hours below ventilation levels available with constant speed ECM operation. Applicable in new and existing commercial buildings.
     
     
  
  
  
• Heat-pump domestic hot-water heaters that also provide air conditioning - New and Existing Facilities
  The proposed measure uses a heat pump to air condition the surrounding space while heating domestic water, and includes controls (including valves, piping, ductwork and dampers) to assure that air conditioning and water heating are provided only as needed. Beneficial for locations such as laundries and kitchens with high use of domestic hot water and air conditioning year round. Not available for hydronic-loop heat pumps in new construction. In existing facilities, must replace a hot water heater that uses electric resistance heat.
  
  
• Ultra-sonic humidification - in Existing Facilities
  In order to be eligible for this bonus, the new humidifier must replace an existing humidifier in which electric resistance heat is used to generate steam. Ultra-sonic humidifiers add moisture to the air without heating the water, so the energy savings are over 90%. Humidifiers are commonly found in hospitals, art museums, industrial processes, and computer rooms. This technology has become standard in new construction.
  
  
• Transformers that are TP-1 rated and k-rated - New and Existing Facilities This bonus is available for applications with high harmonic content, where a k-rated transformer is needed to achieve a high overall energy efficiency.
  
  

• Conversion of industrial equipment from compressed air to direct drive - in Existing Facilities
  Compressed air is often used in industry to drive processes that could be achieved using far less electricity. Electricity savings of up to 80% may be realized for switching from use of compressed air to direct-drive (via electric motor) for specific applications, such as cooling, drying, conveying, mixing, and cleaning. This type of measure requires familiarity with the specific application, but creating thinking can yield strong economic benefits.
  
  
• Clean-on-demand compressed air controls for baghouses - in Existing Facilities
  Baghouse bag filters are typically cleaned with pulses of compressed air. Some controls issue pulses at regular time intervals, regardless of the level of need. This bonus is available for replacing baghouse compressed air controls that issue pulses at fixed time intervals with controls that issue pulses based on measurement of the differential pressure across the bag filters. Potential benefits include energy savings and longer bag filter life.
  
  
• Replacing desiccant compressed air dryers with refrigerated dryers - in Existing Facilities
  Sometimes desiccant dryers are used where the dewpoint achievable with a refrigerated dryer would suffice. This bonus is available to customers willing to have their desiccant dryer permanently removed and replaced by a cycling refrigerated dryer. Benefits include reduced operating costs by reduced use of both electricity and desiccant fill.
  
  
• Replacing existing desiccant compressed air dryers that use electric resistance heat with heat-of-compression desiccant dryers - New and Existing Facilities
  Where very dry air is needed, the customer should consider replacing their standard desiccant air dryer with a desiccant dryer that uses waste heat from the compressor to regenerate the desiccant.
  
  
• Air compressors with variable speed drives, replacing compressors with modulating controls - in Existing Facilities only for compressors less than 50-hp VSD control of air compressors is more efficient than load no-load controls, which are more efficient than modulating controls. By adding a bonus for VSD-driven air compressors, the utility encourages the customer to leap-frog the load no-load controls when replacing a compressor with modulating controls.
  
  

The Seattle City Light Web Team: