Ravenheat boilers - affordable and efficient

Ravenheat boilers - high efficiency Ravenheat boilers

CSI 120 and CSI 150

The CSI range of high efficiency combination boilers has been designed to deliver powerful heating and hot water performance, whilst also saving energy. Both models are SEDBUK Band A rated, with certified efficiencies of over 90.1% and are therefore recommended by the Energy Saving Trust.

A cylindrical Giannoni, large surface area stainless steel heat exchanger plus fan inside CSI premix boilers delivers fully modulating outputs, so the boiler adapts to the actual demand and reduces gas consumption. It also ensures Class 5 low NOx emissions, well below UK standards.

At just 700 x 400 x 300mm, the CSI 120 and CSI 150 are the smallest high-output combination boilers on the market, making them perfect for situations where space is tight but powerful performance is required.

The CSI 120 and CSI 150 are fully compatible with Energycatcher, our innovative Passive Flue Gas Heat Recovery System (PFGHRS) which recycles the heat in flue gases to reduce DHW costs by up to 52%.

  • Installer
  • Homeowner
  • Social housing / housebuilders
  • Controls
  • Flueing
  • Technical data

  • The CSI 120 and CSI 150 are affordable, high-performance boilers which will help you win more work. Quality and reliability come as standard through the use of the highest quality components and an all brass manifold for extra durability. This means that you really can “fit and forget.” CSI boilers are backed up by a three-year parts and labour guarantee with the option to extend up to a total of five years for complete peace of mind.

    CSI 120 – modulating CH output from 5.7 – 28.8kW and DHW flow rate of 13.2 litres/minute @ 35ºC rise
    CSI 150 – modulating CH output from 7.9 – 35.5kW and DHW flow rate of 17.3 litres/minute @ 35ºC rise

    Premium components:

    All brass manifold
    Giannoni heat exchanger
    Honeywell gas valve
    Low-energy Grundfos pump

    Main features:

    Fully modulating burner and fan
    Built-in automatic bypass
    Differential pressure switch (prevents dry firing and protects the heat exchanger)
    Built-in condensate trap and flexible condensate pipe
    Pump overrun on heating
    Fan overrun to clear the combustion chamber quicker
    Daily pump kick
    Frost protection
    Extended anti cycling device allowing the boiler to still fire if the return temperature drops significantly
    Easy to access all major components from the front + controls under lift-up flap
    Colour coded, compact and standardised valves that sit close to the wall
    Integrated isolation valves rather than tails
    Simplified diagnostics and status codes
    Comes pre-wired with 1m of flex
    Rear piping / stand off bracket available
    Fully insulated casing ensures minimal noise
    Operates even on low mains water pressure
    Straightforward commissioning process
    Flue gas analysis points on flue

  • Both the CSI 120 and CSI 150 offer powerful performance suitable for two or three bedroom properties, delivering both heating and hot water. These models can also be used in one bedroom properties where there is an exceptional demand for hot water.

    Both CSI models are affordably priced and will typically pay for themselves within two to four years, making them an excellent investment. You could save as much as 30% on your gas consumption, which will help to bring down your gas bills and get more usable heat for each pound you spend. In standby mode CSI boilers are also energy efficient with standby losses of just 3W.

    Because of their compact dimensions, the CSI 120 and CSI 150 can be fitted in many locations in the home, including inside a kitchen cupboard. A fully insulated case also ensures minimal noise, so you're less likely to hear the boiler working in the background. Our built-in frost protection also allows the boilers to be sited in outside spaces, such as a garage.

    For complete peace of mind CSI boilers are backed up by our standard three-year manufacturer's guarantee covering parts and labour. We offer guaranteed same-day or next-day service callouts, to ensure that if there is a problem, it's resolved quickly and with minimal disruption. You also have the option to extend the guarantee by a further one or two years.

    If you are in an area which is not on mains gas, CSI boilers are also available in LPG models.
  • For registered social landlords, Ravenheat high efficiency boilers are an excellent way to tackle fuel poverty and provide affordable warmth for your tenants. As well as delivering savings of up to 30% on heating bills, the initial capital cost of our products is much lower than many of our competitors, making it more cost effective for you to undertake large scale retrofit projects across more of your housing stock. 



    All Ravenheat boilers are designed to the highest quality standards, working towards the principals of Best Value and with the aim of maximising the useful life of the product and minimising ongoing maintenance costs. By using premium components (including an all brass manifold in our CSI combination boilers, for added durability) we ensure failure rates of less than one percent in the field, and typically expect our boilers to last for up to 15 years.

    The low initial outlay for Ravenheat boilers, combined with our reliability means that RSLs who are experiencing disproportionately high maintenance costs for their existing condensing boilers could even save money by replacing those appliances, rather than continuing to repair them over their lifetime.

    
According to the Energy Saving Trust, an average three-bedroom family home could save as much as ￡300 per year, when upgrading from a G rated appliance (less than 70% efficient) to a Band A appliance, such as the CSI 120 and CSI 150, with heating controls.
  • Our wireless controls not only maximise the efficient operation of the boiler, they also allow householders to match their heating requirements to their lifestyle so that the home is at the desired temperature exactly when they need it. The WHITE HEAT range can be fitted with our optional 7-day combined room thermostat and timer, with programming options that split in to 24-hour periods, with up to 48 individual time slots. If your customers require simplified operation, there are also pre-defined “Comfort” and “Economy” settings.

    The transmitter, with its easy-to-read back-lit digital display is common to both models and has an  operating range of up 30m from the receiver unit. It can be wall mounted, or free standing and should ideally be placed approximately 1.5m above the ground in order to have maximal effect.

    The RHVT 1 includes a receiver unit which can be fitted away from the boiler, while the RHVT 2 has a receiver that is easily fitted in to the control panel of the boiler and is the same size as the standard clock which it replaces.

    Both types of receiver have a built-in manual override and LED display. Once set, the RF transmission code is set using dip switches, making it unique and preventing interference from any other RF signals.

  • The CSI 120 and 150 can be fitted with either a 100mm standard concentric flue, a 125mm flue duct or a twin eccentric flue duct, all in either horizontal or vertical configurations depending on the application. A standard one metre (60/100) horizontal flue kit is supplied separately and can be extended up to a maximum of 8 metres horizontally, or 13 metres vertically (without bends or elbows).

    The 125mm concentric flue system allows even greater siting flexibility, with runs runs of up to 26 metres.

    Finally, the twin flue ducting is ideal for covering extremely long distances and when used with a custom Ravenheat connector can extend the total flue run to 43 metres air intake / exhaust.

    100mm flue accessories
     

    Diagram ref Description Barcode Part number
    1 1 metre horizontal flue kit   PR5023016
    2 Straight flue header / Sample P   PR5094110A
    3 1 metre high plume kit   TER110101
    4 1 metre flue extension   PRFE
    5 45° in-line flue bend   PR45FBI
    6 90° in-line flue bend   PR90FBI
    7 Flashing sleeve / plate   TEG060050
    8 1 metre vertical terminal   TER110200
    9 Combi ridge terminal kit   TER090100
    10 90° flue exhaust deflection bend   CUR110100
    11 45° flue exhaust deflection bend   CUR110050
  •     CSI 85 AAA CSI 120 CSI 150
    Central heating        
    Maximum output kW 22.3 28.8 35.5
    Minimum output kW 11.4 5.7 7.9
    Maximum temperature °C 85 80 80
             
    Domestic hot water        
    Maximum output kW 28.0 32.2 41.5
    Minimum kW 12.3 5.0 7.9
    Flow rate 6°C inlet, at 30°C rise l/min 13.2 15.4 20.1
    Flow rate 6°C inlet, at 35°C rise l/min 11.0 13.2 17.3
             
    Expansion vessel litres 7 8 8
             
    Connections        
    Heating flow and return mm 22 22 22
    Gas connection - compression mm 15 15 15
    DHW supply - cold mm 15 15 15
    DHW supply - hot mm 15 15 15
             
    Efficiencies - Nat Gas        
    SAP 2005 % 90.1 90.6 90.6
    SAP 2009 %      
             
    Efficiencies - LPG        
    SAP 2005 % 92.1 92.6 92.6
    SAP 2009 %      
             
    Electrical mains supply   230V 50Hz FUSED 3amp 230V 50Hz FUSED 3amp 230V 50Hz FUSED 3amp
             
    Parts and labour guarantee years 3 3 3
    Dimensions - H x W x D mm 770 x 450 x 310 700 x 400 x 300 700 x 400 x 300