Discontinued Product, please contact 0800 RINNAI for more information

Discontinued Product, please contact 0800 RINNAI for more information

Rinnai Infinity HD250 External (REU-VM3237WC)

Rinnai Infinity HD250 External (REU-VM3237WC)


Temperature controlled continuous flow gas hot water system for external applications. Factory preset to 75 °C.

Hot water capacity
2.4 to 37 litres per minute.

Energy efficiency

Suitable for
• Commercial and domestic external applications
• Applications requiring higher hot water temperatures, can be set up to 95 °C
• Mains and low pressure systems

Hard or acidic water will need to be treated in order to use this product.

Gas type
Available for Natural Gas or LPG. Specify gas type at time of purchase.

The following diagram has been provided to assist you in determining where (and if) an external continuous flow water heater can be positioned. If in doubt, prior to purchase, consult a licensed gasfitter.

Colour: Silver
Input: 250 MJ/h or 69 kW
Output: 55.2 kW
Efficiency: 80%


Capacity Hot water capacity: 2.4 to 37 litres per minute
Nominal water capacity: 32 litres per minute at a 25 °C rise (1920 L/h)
Connections Hot water oulet: R¾ (20 mm)
Cold water inlet: R¾ (20 mm)
Gas supply: R¾ (20 mm)
Exhaust System Forced flue
Ignition System Direct electronic ignition
Injector Size (mm) NG: 1.00, 1.65  LPG: 0.75, 1.15
Line Pressure (min.) NG: 1.13 kPa,  LPG:2.75 kPa
Line Pressure (max.)

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 line pressure down.

Power Consumption Normal: 72 W,  Standby: 2 W, Automatic Frost Protection: 116 W
Pressure Relief Valve opens at 2060 kPa, valve closes at 1470 kPa
Noise Level 49 dB(A)
Safety Devices Flame failure, boil-dry protection, overheat protection (OHS), fusible link, pressure relief valve, combustion fan rpm check
Water Supply Nominal operating pressure: 140-1000 kPa
Minimum water flow: 2.4 litres per minute
Weight 29 kg
Compliance ES Supplier Declaration of Compliance:
• Declaration Number: 10996200911
Market Release 2006
Discontinued 2009

  All dimensions are in mm  
A Width 470
B Depth 244
C Height - unit 600
D Height including brackets 644
E Hot water outlet from wall 115
F Hot water outlet from centre 61 
G Cold water inlet from wall 99
H Cold water inlet from centre 52 
I Gas connection from wall 61
J Gas connection from centre 110
K Condensate outlet from wall
L Condensate outlet from centre
M Gas: Length of gas connection (from base)
Cold: Length of cold water inlet (from base)
Hot: Length of hot water outlet (from base)

Rinnai Infinity HD250 External (REU-VM3237WC)

Ducted Gas Heating Service Centre

Ducted Gas Heating Service Centre
Operating 5 days a week, 8am to 5pm, Monday to Friday our New Zealand based customer service centre provides nothing but top quality. If you need to book in a Ducted Gas Heating service, we have a team of providers fully trained and equipped with diagnostic tools to service your appliance when you need them. 

Architects Portal

*Architects* Portal

Are you an Architect, Designer or Specifier?

We have everything you need to support your design process including CAD & BIM content. Check out everything you need from one easy Architects and Designers portal.

Enquire about a product

We’re happy to help with anything, big or small. Please fill out the short form below and we’ll get back to you within 24 hours.

Please enter your name Please enter your email address Please enter a subject Please enter a message