IBSE JOURNAL #Build2Perform February 2020 www.cibsejournal.com HEAT OF THE MOMENT Why Copenhagens drive for zero carbon is attracting worldwide interest FUTURE RETROFITS FOR ZERO CARBON UNCERTAINTY SLOWS PAY RISES SWITCHING TO A COMMUNAL HEAT PUMP CIBSE Feb20 pp01 Cover.indd 1 24/01/2020 15:26