Airtherm worked with contractor AC Preou Limited on boiler house refurbishments at Lambeth Hospital in London. They removed old equipment at Reay House and Oak House and replaced it with new efficient Ideal commercial boilers. Airtherm installed flue systems for the boilers simultaneously within two days to meet the client's schedule. The flue systems included Masterflue twin wall flues with insulation and silicone seals to operate efficiently and safely.