Radiant cooling cools a floor or ceiling by absorbing the heat radiated from the rest of the room. When the floor is cooled, it is often referred to as radiant floor cooling; cooling the ceiling is usually done in homes with radiant panels. Although potentially suitable for arid climates, radiant cooling is problematic for homes in more humid climates.
The panels cover most of the ceiling, leading to high capital expense for the systems. In all but the most arid locations, an auxiliary air-conditioning system will be required to keep the home's humidity low, adding further to the capital cost. Some manufacturers do not recommend their use in homes, while the Radiant Panel Association suggests they could yield added comfort and energy savings when used in combination with a central air conditioning system.
In addition, the limited U.S. experience with radiant cooling creates concerns about the quality and availability of professionals for installation, maintenance, and repair of a residential system.
Despite these caveats, there may be cases where radiant cooling is appropriate for homes, particularly in the arid Southwest. Radiant cooling systems have been embedded in the ceilings of adobe homes, taking advantage of the thermal mass to provide a steady cooling effect.
Homes built on concrete slabs are prime candidates for radiant heating systems, and radiant floor cooling takes advantage of the same principle using chilled water. This is particularly economic in homes with existing radiant floor systems. Again, condensation is a concern, particularly if the floor is covered with heavy carpeting, and the effect is intensified by the tendency of cool air to collect near the floor in stratified layers. This limits the temperature to which the floor can be lowered.
Despite that limitation, a study performed by DOE's Oak Ridge National Laboratory found that some early morning cooling of a home' s concrete slab, combined with nighttime ventilation, could shift most of the cooling loads for a house to off-peak hours, reducing the electrical demand on electric utilities.
The Healthy House Institute (HHI), a for-profit educational LLC, provides the information on HealthyHouseInstitute.com as a free service to the public. The intent is to disseminate accurate, verified and science-based information on creating healthy home environments.
While an effort is made to ensure the quality of the content and credibility of sources listed on this site, HHI provides no warranty - expressed or implied - and assumes no legal liability for the accuracy, completeness, or usefulness of any information, product or process disclosed on or in conjunction with the site. The views and opinions of the authors or originators expressed herein do not necessarily state or reflect those of HHI: its principals, executives, Board members, advisors or affiliates.
