The SUF range direct-fired gas water heaters provide a new level of economy and efficiency in hot water production. All models are fully condensing and incorporate a burner modulation giving up to 97% thermal efficiency and are designed to operate as a room-sealed system in both vented and unvented commercial/industrial applications. With vertical or horizontal concentric or parallel flue kits,up to 100 meter in length, the range is particularly useful where extensive conventional flues are either not possible or practical.

  • Nominal output of 31.0 to 121.8 kW
  • Capacity of 217 up to 480 litres
  • Fully room-sealed condensing high-efficiency water heater 109% (nett)
  • Automatic gas/air premix burning system including burner modulation
  • Delivered with low-maintenance inert anodes
  • NOx emission ≤ 30 ppm (dry – air free) – NOx class 5
Nominal Capacity kW: 31 – 121.8
Storage Volume Liters: 217 – 480
Power Source: Natural Gas
Limited Tank Warranty: 5 Years
Limited Parts Warranty: 1 Years
Anode: Powered Anode
T&P Relief Valve: Yes
Water Connection Location: Top
Emissions: Ultra-Low NOx

Gas-fired water heater will be as State Water Heaters SUF series or equivalent. Condensing direct gas-fired water heater with 8 bar rated and 12 bar tested glass-lined tank, foam insulated and meeting energy class A per European regulations. Glass-lining to be made by the water heater manufacturer to ensure glass matches the thermal and physic expansion properties of the steel. Heater will have a modulating pre-mix gas burner with automatic gas/air mixture regulation, easily converted from LPG to natural gas. Internal double loop spiral burner chamber and heat exchanger will ensure a 97% heat transfer efficiency and prevent calcium build up on heat exchanger. Burner will be low NOx (≤ 30PPM) and low noise. Low-maintenance inert electric anodes to ensure additional corrosion protection. Heater will have electronic programmable controls with week programs, status and fault indication on display, anti-legionella cycle, programmable circulation pump relay and BMS connection for fault report. Heater will be factory supplied with brass hot and cold water connection and drain valve. Venting material to be supplied by water heater manufacturer to ensure easy long distance safe flue gas discarding up to 100 meter.