Side-by-side laboratory comparison of radiant and all-air cooling: how natural ventilation cooling and heat gain characteristics impact space heat extraction rates and daily thermal energy use

•Radiant cooling must remove more thermal energy from a space than all-air cooling.•Buildings with all-air cooling reject more heat by passive means than buildings with radiant cooling.•The peak space heat extraction rate for radiant cooling is larger than for all-air cooling.•These differences are larger where heat gains are highly radiant.•These differences are larger where there is large opportunity for passive cooling.