The Keston Heat 2 55kW is a high-capacity heat-only boiler engineered to resolve complex routing challenges in large domestic and light commercial environments. Unlike standard concentric models, this 60.10kg unit operates on a 50mm muPVC solvent weld twin flue system, permitting extended extraction runs of up to 18m. This exceptional routing capability allows the appliance to be situated deep within a building footprint, far away from external walls.

Measuring 850x500x360mm, the boiler delivers a highly efficient 5:1 turndown ratio to accurately match fluctuating thermal demand. The natural gas appliance features an inbuilt low energy modulating pump with a 3m minimum head, ensuring robust circulation across expansive pipework networks. Achieving a Low NOx Class 6 rating, it strictly limits nitrogen oxide emissions. With up to 110% part-load efficiency, it offers a highly advanced, room-sealed solution for heavy-duty heating circuits. This meticulous approach to combustion technology ensures the property benefits from an environmentally conscious and highly reliable thermal network.

Q: What is the maximum permitted flue length for this appliance?
A: The twin flue configuration supports extended runs up to 18m using standard 50mm muPVC pipework.

Q: Does this model include internal circulation components?
A: The unit features an integrated low energy modulating pump to drive primary circulation.

Q: What are the clearance dimensions required for the chassis?
A: The physical boiler casing measures 850mm high, 500mm wide and 360mm deep.

Q: What is the environmental classification for its emissions?
A: The appliance operates with a highly efficient Low NOx Class 6 rating.