Radiant Slab Cooling for Retail

Ian Doebber, Mike Moore, Michael Deru

Research output: Contribution to journalArticlepeer-review

9 Scopus Citations


The design, field installation, control, and anticipated performance of a radiant-cooled floor and dedicated outdoor air system (DOAS) in a big box retail store, in a sixth-generation high-efficiency Wallmart store opened in Sacramento, Calif., in June 2009, are presented. The system satisfies the performance and construction objectives of maximizing evaporative cooling, decoupling ventilation from occupant conditioning, shifting peak cooling, and improving thermal comfort. The final radiant floor design, labeled installed radiant floor, met a sensible cooling demand of 15.8 Btu/h.ft2 with a 66°F floor surface temperature. Three fluid coolers rejected heat from the refrigeration racks and provided waterside economizing for the radiant floor, while merchandise and checkout zones were ventilated by four DOAS units. Simulations supported proof of concept of a 4 inch uninsulated radiant-cooled slab that would conserve energy while meeting thermal comfort requirements.

Original languageAmerican English
Pages (from-to)28-38
Number of pages11
JournalASHRAE Journal
Issue number12
StatePublished - Dec 2010
Externally publishedYes

NREL Publication Number

  • NREL/JA-5500-50530


  • evaporative cooling
  • radiant cooling
  • thermal comfort


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