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Photo credits

Some photos on this site are shared by their authors under Creative Commons licences. Thank you to:

• A Vitodens 200 condensing boiler: Boulderhydronics, CC BY-SA 3.0
• An older Renova Bulex gas boiler: Nolf, Public domain
• A Danfoss thermostatic radiator valve: Santeri Viinamäki, CC BY-SA 4.0
• A radiator with a thermostatic valve: Tiia Monto, CC BY-SA 3.0