Product code: S12440
The Potterton Sirius Three 90 floor standing condensing boiler is suitable for a whole range of projects of varying sizes requiring up to 440kW or 1WM as part of a cascade system. This unit offers modulation ratios of up to 9:8, has a reliable stainless steel heat exchanger and boasts the lowest NOx rating available. It's also ErP A-rated for energy efficiency and offers a gross seasonal efficiency of up to 97.5%. Extremely compact and fitted with castors for easy roll-in, this boiler makes installation straightforward.