35kW Combi boiler
Our modern 35kw combi boiler employs condensing technology to effectively heat the system water by removing latent heat from the flue gases which enables these boilers to have a “A” ErP rating for space heating efficiency and “A” ErP water heating efficiency rating, which means higher efficiency and thus lower running costs and for this combination boiler.
A combination boiler is the most popular boiler type in the UK, as the size of a combi boiler is one of its main benefits. As Combi boilers do not require external hot water cylinders / water storage cylinder, this type of boiler provides both hot water and central heating in a single compact unit for more than one bathroom properties.
Having “heating and hot water” in one boiler has many benefits and will save installation space on site and the users or customers will have a lower installation cost as a combi boiler installation is quicker that a system boiler and indirect cylinder installation.
Our gas boiler has a great modulation or turn down ration of almost 10:1 in range, which means the boiler will match or address the central heating load requirement very closely with high efficiency, ensuring you’ll save money on your energy bills.
With low noise level, this reliable gas boiler, which is available to natural gas or propane gas (LPG) will produce 16 litres/min with a temperature rise of 30C of domestic warm water and is up to 108.6 % efficient.
35 kW Combination Boilers
A gas burner in the combi boiler is lit when you need hot water or heating. The primary circuit receives the heat from the burner through the main heat exchanger, where it is then either moved straight to the radiators or through a plate heat exchanger to your hot water taps in larger homes.
One of the key features of our 35 kw ErP compliant modern combi boiler is a “pre-heat” system, which enables the boiler to contain a small volume of water that can be used instantly. The water is kept in the boiler all day and kept at the desired temperature so that it can be quickly delivered to the hot water taps.
Fuel options for our 35kw boiler combi
This 35kw combi is available in either natural gas or LPG (propane) gas options depending on local availability of the fuel to the property or house. Should you ever need to change your gas type, just speak to our customer services as we can supply a gas adaptor kit to change the gas boiler to your required fuel type. This is an easy installation and takes less than quarter of an hour to do at most if ever needed.
Stainless steel heat exchangers in our combi boilers
Our full range of condensing boiler models use stainless steel heat exchangers because of their high corrosion resistance across a broad pH range. Your combi boiler will last longer as a result and has a long warranty period, making them a good choice gas boiler for consumers who require a quality solution and high dhw output.
When discussing our combi boilers dependability, the development of our modern new design heat exchanger from one single continuous coil permits the water to move through more quickly, efficiently, and at a higher flow rate performance.
This reduces the possibility of debris blockages, increasing reliability and lengthening the boiler’s lifespan. A Stainless steel heat exchanger construction will withstand high flow rates without corroding or wearing out.
Patented A rated ErP water heating efficiency
Inside the high performance patented stainless steel main heat exchanger is a 12mm diameter internal stainless steel pipe that produces domestic hot water (installed within the 28 mm diameter heating exchanger). This ensures you have a quantity (approximately 7 litres) of “warm water ready to go,” as they say. Its total length is 8 metres. Because these boilers produce domestic hot water by continuously condensing, which makes them very efficient, gas energy costs and energy bills are reduced.
Additionally, these design features reduce the possibility of scale accumulation, which you can expect in older combi boilers with a plate heat exchanger that many companies still use.
In areas with hard water, this is crucial because our heat exchanger’s high velocity and flexing while in use reduce the potential for scale to build up and prevent it from happening, helping to ensure a long life, trouble-free operation, and a good hot water flow rate.
Good mains water pressure is needed for combi boilers
One potential drawback of a combi boiler is that if multiple showers and taps are initiated simultaneously due to combi boilers pulling water directly from the local availability in the mains cold water supply, the water pressure can drop quickly for example.
Our boiler needs a minimum pressure of 0.5 Bar and will operate up to a maximum pressure of 6 Bar. For good hot water performance we recommend around 3 Bar pressure for your hot water system.
Boiler specifications, features and details
Our 35kw heat output combi boiler has both “A” rated ErP water heating efficiency performance for both heating and domestic hot water, with low noise level outputs and is suitable for weather compensation, when used in conjunction with the external temperature sensor that we can supply for our full range of heating and hot water boilers. Weather compensation reduces the heat output to suit the weather conditions which can vary so much on a day to day basis in the UK.
This 35 kw boiler range is suited for space heating or central heating with radiators or underfloor heating systems with a high efficiency of 106.43% when used on a 50/30C range flow and return system which will save you money and cost on your gas energy bills.
With a useful central heating output of 36.19 kW when used on a 50/30C system , or when used on a 80/60C system the central heating output is 33.35 kW.
We use a Wilo pump rather than a Grundfos pump in our 35kw combi, as we consider them a more reliable pump than a Grundfos pump.
For larger homes, or homes that have larger dhw output demands then please look at our next size up combi boiler our – 50kW gas combi boiler
Our 35 kw combi boiler dimension are – Height = 642 mm , Width = 410 mm and a Depth of 350 mm – with a weight of 44 kg making these robust units easy to fit in any installation.
Flow and return and gas connections – 20 mm
Hot and Cold water connections – 15 mm
Flue lengths and options
With extensive flue options of up to 60 metres in length – when using a sperate 80mm diameter twin flue system, or up to 10 metres in length when using our 80/125mm co-axial horizontal flue system option – both options make this combi boiler a room sealed gas appliance.
Or our vertical flue option
This boiler can be controlled via the inbuilt digital display, or you can opt for our smart thermostat range option, which is an OpenTherm control system, that 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 them with what we consider the best 35kw combi on the market.
35kw combi boiler how many radiators can it run ?
The average size radiator in a new build property is now 1.5 kW (kilowatts) output – so your looking at 23 radiators, but for older properties your looking at around 11-15 radiators on average for this size gas boiler type.
Please ensure that the local area boiler installer or a company engineers are gas safe registered and can provide a labour warranty and service agreement on the install.
Delivery or Collection
You can collect for free from our location – postcode BH21 6SZ – just please phone ahead to check stock levels or alternatively we deliver on a small pallet service to prevent any risk of damage, throughout mainland UK and Northern Ireland ,just quote your postcode for the price of this service.
Contact us for free boiler quotes for your combi boiler requirements
Should you require anymore assistance, information or best deals/prices on the best 35kw combi boiler in natural gas or LPG gas on the UK market, please contact our customer services 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.