How does indoor environmental quality in green refurbished office buildings compare with the one in new certified buildings?

Highlights

• Indoor environmental quality (IEQ) was measured objectively and subjectively.
• IEQ performance of 14 buildings was compared in 3 different green building groups.
• Generalised linear mixed model accounting for clustering effects was used.
• Green converted buildings achieved IEQ nearly equivalent to new green buildings’.
• Green converted building occupants rated improved health and satisfaction with IEQ.