CBECS Comparison: Selected Conservation Measures

Home > Households, Buildings & Industry > Commercial Buildings Energy Consumption Survey (CBECS) > Background Information > Selected Conservation Measures Table 5

Comparisons Between 1992, 1995, 1999, and 2003 CBECS

Table 1. Survey Sample and Design | Table 2. Building Characteristics | Table 3. Energy Sources and Consumption | Table 4. Energy-Using Equipment

1992

1995

1999

2003

Lighting Conservation

Specular reflectors;
Daylighting controls; Occupancy sensors; Time clocks or timed switches; Manual dimmer switches;
Other lighting conservation equipment

Same as 1992
AND
Energy-efficient ballasts

Specular reflectors; Electronic ballasts; Skylights or atriums (designed specifically to provide light)

Same as 1999
AND
Automatic controls or sensors that increase or reduce lighting in response to level of natural light

Sponsor of lighting conservation feature

Same as 1992

Not collected

Percent of lighted building space lighted by each feature listed above

Not collected

Insulation

Roof or ceiling insulation;
Exterior wall insulation

Same as 1992

Not collected

Installed during construction or added (if added, year added)

Not collected

Sponsor of building envelope conservation feature

Same as 1992

Not collected

Windows

Storm windows or doors, thermal pane or double or triple paned glass

Same as 1992

Single paned windows; Multi-paned windows; Combination of both

Same as 1999

Tinted or reflective glass or shading films

Same as 1992

Same as 1992 EXCEPT did not include shading films in question

Tinted window glass and Reflective window glass asked separately

Exterior awnings or interior horizontal or vertical shades or miniblinds

Same as 1992

Not collected

Exterior overhangs or awnings

Most windows open and close

Not collected

Installed during construction or added (if added, year added).

Not collected

Sponsor of window conservation feature

Not collected

Heating, Ventilation, and Air Conditioning (HVAC)

Variable air volume (VAV) system; Economizer cycle; Regularly scheduled maintenance and repair

Same as 1992

Installed during construction or added (if added, year added)

Not collected

Sponsor of HVAC conservation feature

Same as 1992

Not collected

Energy Audit

Whether performed AND sponsor

Same as 1992

Not collected

Energy Management and Control System (EMCS)

Presence of EMCS

Same as 1992 AND sponsor

Same as 1992

Given as a choice of how heating or cooling is reduced when building not in full use (not asked unless heating or cooling is reduced)

EMCS controls: Heating;
Cooling;
Domestic hot water heating;
Lighting;
Any other equipment

Not collected

EMCS controls:
Heating; Cooling; Lighting

Person with Day-to-Day Energy Responsibility

Building owner or manager;
Custodian or maintenance engineer; Dedicated dnergy manager; Cleaning or maintenance contractor;
Repair service upon need;
Someone else

Presence of full-time building energy manager

Not collected

Length of service

Not collected

Percent of time devoted to operating and maintaining HVAC equipment in building

Not collected

Other Conservation Features or Programs

Energy-efficient motors; Direct electricity load control;
Thermal storage; Standby electricity generation;
Process heating or cooling (waste heat recovery); Interruptible natural gas rate

Same as 1992
AND
Special rates or incentives

Not collected

Sponsor of feature or program

Same as 1992

Not collected

Reduction in Use During Off-Hours

Heating;
Cooling;
Hot water heating;
Lighting;
Other equipment

Heating;
Cooling;
Lighting

Heating;
Cooling;
Office equipment and computers

Same as 1999