Natural Gas or LPG, gas type specified at the time of purchase

• EF24, 2.3-30 L/min, nominal water capacity is 24 L/min at a 25 °rise (1440 L/h)
• EF250/EFi250, 1.5-37 L/min, nominal water capacity is 32 L/min at a 25 °rise (1920 L/h)

• Hot water outlet R¾ (20 mm)
• Cold water inlet R¾ (20 mm)
• Gas supply R¾ (20 mm) 
• Condensate R½ (15 mm)

Direct electronic ignition

• External unit - forced flue
• Internal unit - forced flue (balanced flue, room sealed fan assisted), flue diameter; inner Ø80 mm, outer Ø100 mm

Fitted as standard. Frost protection operates automatically, as long as the appliance is connected to the electrical power supply, by activating when the temperature inside the unit drops below 3.5 °C, and turns off once the temperature inside the unit reaches 7 °C.

* = only one point

NG - 1.13kPa, LPG - 2.75 kPa

3.5 kPa (maximum standing pressure under abnormal intermittent conditions is 5.0 kPa).

In the case of commercial metering, (i.e. 35-37 kPa coming in), there may be a requirement to regulate the incoming pressure down.

50 dB(A). Some people are susceptible to low level noise. This needs to be considered if locating an appliance near a bedroom.

less than 60 ppm

• EF24, normal 50 W, automatic frost protection 118 W
• EF250, normal 51 W (NG), 62 W (LPG), automatic frost protection 170 W
• EFi250, normal 72 W (NG), 92 W (LPG), automatic frost protection 218 W

All units have a standby of less than 3 W

• Flame failure
• Boil-dry protection
• Overheat protection
• Fusible link
• Pressure relief valve
• Combustion fan RPM check

Nominal operating pressure: 240-1000 kPa
Activation flow rate: 2.4 litres per minute (EF24) and 1.5 litres per minute (EF250/EFi250)

Please note: If the water inlet pressure or flow rate drops below the minimum values stated above, operation of the INFINITY is not guaranteed. The unit requires both minimum flow rate and pressure to operate correctly.

EF24 - 27 kg
EF250/EFi250 - 32 kg

Energy Safety Supplier Declaration of Compliance declaration numbers:

• EF24 - 1431020135
• EF250/EFi250 - 1008720096

EF24 first released in 2008, relaunched 2011
EF250/EFi250 - July 2011

• EF24, Mar 2020, superseded by the EF26
• EF250, Jan 2020, superseded by the N-Series
• EFi250, Nov 2019, superseded by the N-Series