24KW Combi Boiler – Combination boiler
A 24 kW combi boiler is an ideal new boiler that is suitable for a small one-bedroom home, apartments or flats.
Because there isn’t much space to heat in these-sized properties, there are normally fewer than ten radiators (the average size of radiators in a new build property is 1.5 kW). There is also less demand for domestic hot water in the property because they frequently have a shower or a single bath that can’t be used simultaneously.
Our 24 kW combi boiler is a small boiler that provides both heating and hot water on demand. With its compact dimensions, it is designed to fit into a standard 350mm deep kitchen cupboard unit and has a low lift weight, which makes them the right combi boiler for these types of properties.
These combi boilers are are available in natural gas or LPG ( propane) gas and
This gas boiler has an ErP rating of : Water heating efficiency “A” and a space heating efficiency “A” – thus reducing energy usage.
Instant warm water on demand
The instant hot water system, provides energy efficient hot water to the taps or bathroom, and that’s why the Energy Saving Trust recommends a high efficiency combi boiler, when installing a new heating system or to replace an existing non condensing combi boiler in your flat or smaller property.
Larger properties, with more bathrooms will have a higher demand for instant water , and require a larger boiler size to achieve the local availability of warm water to the taps or showers through the home – as a boiler guide we do a 35kW combi boiler ( typically to suit a 3 bed home for example) and a 50kw combi boiler suited or capable of doing 4 or 5 bedroom property depending on related factors such as available mains water flow rate to the home. The 50kW combi boiler version has its own dedicated webpage, that shows all its features and performance data here : 50kW combi boiler
High efficiency combi boiler
All boiler manufacturers have since 2005 , have had to make a high efficiency combi boiler which is condensing in operation to help reduce carbon emissions via the combi boilers lower carbon-footprint. It has been mandatory to instal condensing boilers, whether they are combi boilers or system model boilers.
Our easy-to-use combi boiler is “A” rated for both heating and hot water, making it a high-efficiency combi boiler.
Hot water heat exchanger
The 12mm diameter internal stainless-steel pipe where domestic hot water is produced, is inside the patented stainless steel main heat exchanger (28mm diameter). Its total length is 8 meters, and this ensures you have a volume (approximately 6 Litres) of “warm water ready to go” as they say. The DHW production is always available and always in condensing operation, resulting in lower energy costs and bills for these combi boilers.
This design feature also reduces the chance of scale, something that older technology combi boilers that use a plate heat exchanger can suffer from. This is incredibly important in hard water areas– as our heat exchanger, with its high velocity and flexing in operation, reduces the ability for scale to build up, and prevents this happening ensuring a long life 24kw combi with trouble free operation and a good hot water flow rate.
This unique and clever engineered solution for our heat exchanger system provides many advantages as opposed to most boiler manufacturers that use a traditional separate plate heat exchanger system, for the domestic water. This why many consider our 24 kW combi boiler the best combination boiler on the market in the UK, with high reliability at a fair market price or cost.
Central heating system or space heating of the combination boiler
A combi boiler provides warm water for radiators or an underfloor central heating system or any other type of space heating, with our compact 24kw combi model having a hot water (DHW) priory system. The total heat requirement (radiators ,underfloor heating etc) should not exceed 24.79 kW based on a 50/30C flow and return heating when in operation on the coldest of days for this boiler size.
Specifications of the R2C24 combi boiler 24 kW condensing boiler
The models comparison of technical data, is covered in the picture below.
and in more detail in the manufacturer manual – which can be downloaded here –
Download the Flexiheat R2C 24kW Combi Boiler Manual
Our 24 kilowatts output dimension details are generally – Height = 642 mm , Width = 410 mm and a Depth of 307 mm – making the units easy to fit in any installation.
24kW Combination boilers with high modulation
Our combi boilers have an exceptionally high modulation range or ratio of 1:9 for this size boiler, which means our 24kw combination boiler will ramp all the way down to 2.9 kW of heat output. This high modulation range ensures the closest of heat load matching to the properties demand, which results in lower heating energy bills.
These combi boilers fire up when the water temperature drops below 5 °C within the heat exchanger, automatically starting the burner until the heating water reaches the temperature range of 30 °C. This anti-freeze system will protect the boiler up to an external temperature of -10 °C.
Flue lengths and options
With extensive flue options of up to 60 metres in flue length – when using a sperate 80mm diameter twin flue system, or up to 10 metres in length when using our 60/100mm or 12 metres for our 80/125mm co-axial horizontal flue system option – Both systems make these combi boilers a room sealed gas appliance.
Or our vertical flue options
All our boiler sizes, be they the 24kW, 28kW or 35kW outputs or models can be controlled via the inbuilt digital display or you can opt for our smart thermostat range option, which is an open-therm control system, which allows you to control these combi boilers from an app on your phone, tablet, or computer.
Nest and Hive controllers are Opentherm compatible, so you can use these with what we consider the best boiler on the market.
An Open-therm thermostat controller is a smart controller which helps your central heating run in an more energy-efficient state, as they can optimize and weather compensate the heating systems to the external weather conditions – Explained very well in the following video –
Condensing boiler installation
As gas safe heating engineer installer, normally with local availability must be used to ensure a safe installation ( always check their company registration number with the gas safe register) and to provide a labour warranty on the 24kw combination boiler install.
Our 24kw combi boiler model are the ideal boilers for a smaller house, apartment or flat, with its compact dimensions this size boiler can fit in a kitchen cupboard if so required. Should you require anymore assistance, information or price on the best small combi boiler in natural gas or LPG on the UK market, please contact our sales team on 01202 822221 or use our email contact above on the web page for our email contact form. All of sales are supplied with a vat invoice.