If the worst should happen and your boiler stops working we’re ready to respond as soon as you pick up the phone. Pay online with paypal or card. Bio-clean drain septic (2 pounds), $50. A high efficiency condensing range of oil-fired outdoor combi boilers designed for cost effective installation, instant hot water production and situations where internal space is at a premium. For further information, download the. Maximize the output of your hvac equipment while keeping your.