Indoor High Efficiency Condensing Boilers

The Warmflow High Efficiency Condensing Utility Series has been specifically designed to fit into kitchen and utility room applications.  With models starting at only 865mm high and 413mm wide, the High Efficiency Condensing Utility Series is available in Standard, Pumped, System and Combi variants.

Key Features

• Available in outputs from 15 to 44kW
• Designed to fit neatly under standard work surfaces (models up to 120HE)
• Stylish, pre-coated white casing
• Front servicing
• Suitable for use with conventional flues or with the multi-optional HE ‘Easy-Fit’ Balanced Flue System
• Riello RDB2.2 and 3.2 burners fitted as standard
• Optional 7-day Digital Programmer for mounting within the boiler casing

The Utility Standard Boilers (UHE) are supplied with a pre-wired, factory-fitted burner and thermostat. Only one IE320 mains socket (supplied) needs to be wired on site. The multi-optional flue system can be routed through the top, back, left or right hand side of the casing.

The Utility Pumped Boilers (UPHE) are supplied with a pre-wired, factory-fitted burner, thermostat and circulating pump. Only one IE320 mains socket (supplied) needs to be wired on site. They are also factory-fitted with a 3-Bar pressure relief valve and auto air vent as standard. The multi-optional flue system can be routed through the top, back, left or right hand side of the casing. The Utility Pumped Boilers allow for hassle free, quick and cost-effective installations.

The Utility System Boilers (USHE) are supplied as a kit, consisting of a Utility Pumped Boiler (UPHE) (see above) and a System Kit.

As described above, the Utility Pumped Boiler (UPHE) is supplied with a pre-wired factory-fitted burner, thermostat and circulating pump. Only one IE320 mains socket (supplied) needs to be wired on site. The multi-optional flue system can be routed through the top, back, left or right hand side of the casing.

The System Kit consists of a pre-assembled expansion vessel, pressure gauge and filling loop. A pressure hose for connection to the system is also supplied. The System Kit can be connected in only a few minutes creating a sealed heating system.

Models up to 120HE are supplied with System Kit SK1 having a capacity of 12 litres suitable for a maximum total system volume of 145 litres. Refer to BS7074 and the Boiler Manual for further guidance on expansion vessel sizing.

The Utility Combi Boilers (UCHE) are compact yet extremely powerful. At only 595mm wide they are similar in size to most standard kitchen appliances but are still capable of producing over 18 litres of hot water per minute. By utilising the latest twin pump technology and an integral thermal heat store within the boiler casing, the boilers are able to provide plenty of hot water when you need it, as well as helping to keep your heating costs to a minimum.

Key Features

• Available in outputs from 15 to 26kW
• Designed to fit neatly under standard work surfaces
• Stylish, pre-coated white casing
• Front servicing
• Complete with circulating pump, filling loop, pressure gauge and 12 litre expansion vessel
• Integral thermostatic mixing valve
• Suitable for use with conventional flues or with the multi-optional HE ‘Easy-Fit’ Balanced Flue System
• Riello RDB2.2 burner fitted as standard
• Optional 7-day digital programmer, for installation within the integrated the control panel

The Utility Combi Boilers (UCHE) are supplied fully pre-wired with a factory-fitted burner and control panel. Only one 3-pin mains socket (supplied) needs to be wired on site. The multi-optional flue system can be routed through the top, back, left or right hand side of the casing.

1. Pressure Relief Discharge (15mm)
2. Heating Flow (22mm)
3. Domestic Hot Water (22mm)
4. Cold Water Mains (15mm)
5. Heating Return (1" BSP)

Where outputs above 44kW are required a Warmflow High Efficiency Condensing Boiler Cascade System is the ideal choice offering the same performance and installation benefits as the other boilers in our range, plus a lot more.

Key Features

• Available in outputs from 52 to 88kW
• More efficient than a traditional single boiler installation
• More reliable than a traditional single boiler installation
• All the benefits of a High Efficiency Utility Series Boiler

Consisting of two High Efficiency Utility Series Boilers operating together, the Warmflow Cascade System is inherently more efficient than a traditional single boiler installation however is still capable of achieving an equivalent output. At times of low heating demand, only one boiler usually fires to keep the system hot once up to temperature. At times of high heating demand, both boilers fire together to provide their full combined output.

A Warmflow Cascade System is also more reliable than a traditional single boiler installation. If a fault occurs on one boiler the other boiler is still able to provide hot water and some heating. Should a fault occur on one boiler it can be individually isolated from the electrical supply allowing the 2nd boiler to continue operating.

The Warmflow Cascade System is supplied as a pair of High Efficiency Condensing Boilers with a shopping list of additional required components and detailed instructions on how to plumb and wire the boilers together as system. There are two Indoor Cascade Systems available:

U225HE

• Consisting of two U120HE boilers
• Capable of achieving a range of outputs from 52 to 66kW

U300HE

• Consisting of two U150HE boilers
• Capable of achieving a range of outputs from 66 to 88kW