Rinnai gets heavy with continuous hot water

Rinnai, DHW, domestic hot water

Rinnai’s Heavy Duty HD50i Internal water heater is a wall-hung, gas-fired continuous-flow water heater that can deliver hot water at 13 l/min through a 50 K temperature rise. It has a 125 mm concentric flue that can be extended up to 15 m, less 1 m for each 45° bend. These water heaters can operate with pressures from 1 to 10 bar, so they are suitable for mains cold water and systems with boost pumps. Incoming water temperatures of up to 60°C are accepted, making the HD50i suitable for secondary return systems.

Outputs are up to 69 kW, and water temperature is stable to within ±1 K. These water heaters operate only on demand.

For more information on this story, click here: February 2012, 117
Related links:
Related articles:



modbs tv logo

Rinnai UK launches applied products division

Rinnai is launching a new division - Rinnai Applied - which will be dedicated to the design, supply and service of larger HVAC units and systems that will meet the specific heating, ventilation, air conditioning and hot water demands of commercial and industrial premises.

Engineering services alliance welcomes government consultation on retentions and late payments

Actuate UK, the engineering services alliance, has welcomed the new government consultation on reforming cash retentions and taking legislative measures against late payments to small businesses, as part of the new Small Business Plan unveiled on 31st July 2025.