Typically, clinical laboratories possess multiple instruments and pieces of equipment that generate heat. Therefore, heating in winter tends to be slightly less of a problem than cooling in summer, although it depends on the lab location and design. Some techniques mentioned about lighting can also be applied to heating and cooling. Spaces that are used less frequently can have automatic setbacks or timers. Cooling can sometimes be reduced by spacing out high heat-producing instruments so that the laboratorians can feel more comfortable in the room. Some instruments themselves may require lower room temperatures for optimum function. However, sometimes labs are over-cooled, necessitating the laboratorians to wear layers such as sweaters and fleece. In the summer, room temperature should be set at the warmest setting, which is comfortable for most.
Fume hoods are a particular case and have a significant impact on heating and cooling the lab. They can consume even more energy than -80°C freezers. According to the Harvard University Green Labs Program: "Fume hoods are one of the most energy-intensive types of equipment in a laboratory environment, but significant savings can be achieved by keeping them closed when not in use."7(Page 1) By simply closing the sash, the cool or warm air in the room may be prevented from exiting through the fume hood exhaust.
When purchasing new fume hoods, some brands may offer multiple airflow speeds. Lower airflow can be selected during times when the hood is not being used.
