Gas hot water tank or cylinder

Gas hot water tank or cylinder

A gas hot water tank also known as a gas hot water cylinder or gas fired hot water tank are gas fired water heaters that are storage hot water heaters. These water heaters are a solution for high flow rates or high intermittent water heating demands.

A picture of a gas hot water tank or gas fired hot water cylinder from Flexiheat UK, which are used for water heating in large domestic, commercial, and industrial applications. These units are condensing gas water heaters.

Gas water heaters with storage systems for high volumes at intermittent times demand. These condensing water heaters are energy efficient and cost effective to run.

These condensing water heaters are energy efficient gas water heaters that are used in heavy domestic, commercial or industrial applications where people want a domestic water heating device that utilizes a hot water storage tank to optimize water heating capacity and supply hot water instantly.

These gas water heaters suit applications where tankless water heaters cannot supply enough instant hot water flow rate or hot water temperature for the water heating requirements.

Sometimes these gas water heaters are referred to as a gas hot water heater tank, gas water cylinder ultimately, they all refer to the same product.

Water heater applications

Typical applications for this range of gas fired water heaters is health centres, hairdresser saloons, pubs and leisure facilities, hotels and bed and breakfast establishments or larger properties, where hot water demand and good flow rates are essential, and they have a gas supply – either natural mains gas or LPG (liquefied petroleum gas).

These gas water heaters allow you to sperate your central heating system from your domestic hot water system, meaning you can achieve greater energy efficiency by only heating water in the summer months and reduce your energy bills or your customers for their water heating.

This gas fired hot water tank range can also cover a vast range of industrial applications as well, such as producing instant hot water with a storage element for food or process manufacturing that require a energy efficient and cost effective gas water storage systems for high volumes at intermittent times.

Gas fired water heaters

Our largest gas fired water heaters is designated the 50/330 – This 50kW condensing gas-fired direct water heater that raises water from 10°C to 60°C on demand, providing domestic hot water at a rate of 871 litres per hour while maintaining outstanding efficiency and low NOx emissions that comply with ErP regulations for heating water. This gas water heater features a 330-liter storage tank with a fully enamelled heat exchanger enclosed therein for heating water, and it has a 50kW power output from a pre-mix gas burner (natural gas or LPG options).

50kW gas fired hot water storage cylinder water heating performance data-Flexiheat UK

Flow data at a storage temperature of 60C – incoming water temperature of 10C – mixed water temperature of 38C

Features of this 50kW gas water heater

  •  Energy efficiency class “A” – Load profile XXL – Up to 101.5% nett combustion efficiency
  • Anti-freeze and Anti-Legionella functions built-in to these water heaters
  • Fully ErP compliant with low NOx emissions of 39mg/kWh
  • Mains gas (natural gas) or LPG powered options
  • 20% Hydrogen gas mix compliant
  • Enamelled lined tank with dual impressed current cathodic protection
  • Multiple flue options for ease of installation

 

50kw gas condensing storage gas water heater performance detail Flexiheat UK

 

Download the 50kW Gas condensing storage water heater brochure – HY model – Flexiheat UK

50kW condensing gas fired water heaters components

A diagram showing the components for our 50kW gas fired condensing storage water heater form Flexiheat UK.

  1. Flue system outlet Ø 100 / 150mm
  2. Gas valve and regulation
  3. Flue system inspection
  4. Condensate drain
  5. Base of the
  6. Tank inspection flange
  7. Polyurethane foam insulation
  8. Enamelled heat exchanger
  9. Double electronic anode
  10. Combustion chamber
  11. Temperature & Pressure valve
  12. Premix burner

 

Then our “SFKA” Range of gas water heaters

gas hot water tank or gas fired hot water cylinder from Flexiheat UK

This gas condensing water heaters range is designed to store 150 litres of domestic quality water at a hot water temperature of 60C or above in the water storage cylinder, this instant DHW is then available to the installation when there’s a demand from the showers, baths, or hot water taps, with good flow rates.

gas hot water cylinder internal picture showing the storage tank with with high thermal efficiency, tankless gas water heater

Internal picture of our storage gas water heaters

We do two main types or models, a 28kW gas water heater or a 34kW gas water heater 

Our 28 kW output gas-fired hot water tank with its 150-litre stainless steel hot water cylinder (storage tank) will provide a continuous D.H.W. supply at a 30°C temperature rise of mixed water with a first 10-minute flow of 305 litres and a one hour flow rate of 984 litres.

Full detail on this gas water heater is here

Flexiheat SFKA 28.150 Condensing gas storage water heater – Hot water tanks Manual

Or

Our  34 kW output gas-fired hot water tank with its 150-litre stainless steel hot water cylinder (storage tank) will provide a continuous D.H.W. supply at a 30°C temperature rise of mixed water with a first 10-minute flow of 333 litres and a one hour flow rate of 1,167 litres.

Flexiheat SFKA 34.150 Condensing gas storage water heater – Hot water tanks Manual

This gas water heater range is a condensing high-efficiency storage water heater that is room-sealed, meaning these gas water heaters may be installed practically anywhere thanks to its flexible flue options. Making installation of this range of energy efficient condensing water heaters with hot water storage systems quick and easy in any commercial or heavy domestic site.

Condensing water heaters

As our gas fired water heaters range are condensing water heaters, you’re getting many benefits with a reliable and efficient hot water installation, with the benefit of lower energy consumption. They are as such hybrid water heaters, with a tankless water heater which are condensing water heaters combined with a storage tank.

Gas water heater features

Our commercial, or heavy domestic gas water heaters range features

  • Our heat exchanger is produced in stainless steel and has large single-tube coils with a diameter of 28 mm. Because of this, it has very low pressure drops, which means it is less likely to get clogged, uses heat more efficiently, and is easier to clean.

High DHW performance gas fired water heaters

  • The domestic sanitary water temperature adjustment ranges from 40 °C to 60 °C
  • Anti-legionella system;
  • These are condensing water heaters – being highly energy efficient and thus cost effective to run. 
  • Possibility of recirculation or direct feed for high volumes of demand at intermittent times with our gas water heaters
  • Remote management and control of these gas fired water heaters is possible via 0-10 volts or via our Opentherm thermostat and controller with an app that allows you to control the gas water heater from a phone, tablet, or PC.
  • Integrated post-circulation for excess heat disposal to help save energy.
  • Self-diagnostic electronic board with frost protection
  • Integrated recirculation function for immediate DHW delivery;
  • Fast H2O pre-heating for efficient and instant hot water without waiting.
  • Electrical systems protection level is IPX5D
  • Very low NOx emissions, maximum 50 mg/kWh.
  • Suitable Anode to protect the storage tank.
  • Available in natural gas (mains gas) or LPG
  • Can even be used in industrial applications for decentralised water heating with our gas fired hot water cylinder range.

Dimensions of our water heaters gas fired

Both water heaters gas fired have the same dimensions occupying a small space or footprint.

Gas hot water cylinder dimensions for SFKA28 and SFKA34 models from Flexiheat UK

Contact us

Whether you a new customer or a trade account, should you require anymore assistance, information, check stock or get a recommended price / cost on our cost effective  gas hot water tank or gas fired hot water cylinder range in natural gas (mains gas) or LPG on the UK market with fast delivery times, please contact our customer services sales team on 01202 822221 or use our email contact above on the web page for our email form.

35kW Combi boiler – Combination boilers

35kW Combi boiler

35kw combi boiler - a high efficiency combination boiler for central heating and hot water being a condensing boiler with a long warranty. No hot water cylinder is required as your producing domestic hot water on demand.

35kW combination boiler – “R2C34” from Flexiheat UK – high performance domestic hot water output flow rate of 16 litres/min with a 30C temperature rise for commercial or domestic installations

Our modern 35kw combi boiler is a cost effective heating solution that 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 gas combi 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 for heating and hot water.

With low noise level, this reliable gas boiler, which is available to natural gas or propane gas (LPG) will produce a domestic hot water output of 16 litres/min with a temperature rise of 30C and is up to 108.6 % efficient and provides a cost effective heating solution for domestic installations with tested technology.

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 gas combi boiler is a “pre-heat” system, which enables the boiler to contain a small volume of water that can be used instantly for fast hot water response. 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 output gas combi boiler

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 as the unit has easy access to all internal components. 

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 and are better than a aluminium heat exchanger. 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 domestic hot water output.

When discussing our combi boilers dependability, the development of our modern 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 more than a aluminium heat exchanger.

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. It’s 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.

Pipe in pipe stainless steel heat exchanger for heating and hot water production for our 35kW combi boiler suitable for glow worm controls.

 

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.

Blocked combi heat exchanger with scale and debris

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 for domestic installations.

Good mains water pressure is needed for combi boilers

One potential drawback of a combination 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 gas combi, as we consider them a more reliable pump than a Grundfos pump.

R2C34 combi boiler 34kW technical data, showing the central heating or space heating and domestic hot water performance of this condensing boiler by Flexiheat UK

Download the Flexiheat R2C 34kW Combi Boiler Manual

For larger homes, or homes that have larger hot water performance demands then please look at our next size up combi boiler our – 50kW gas combi boiler

Dimensions

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.

combi boiler 35kw dimensions Flexiheat UK

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.

Horizontal flue kit co-axial room sealed for our boilers Flexiheat UK

Horizontal flue kit co-axial – the 80/125mm Ø will go 10 metres

 

Or our vertical flue option

Vertical flue kit co-axial for our boilers Flexiheat UK

Vertical flue kit co-axial – the 80/125mm Ø will go 10 metres vertical

Control options

This boiler can be controlled via the inbuilt digital display, which displays digital operating status and diagnostic 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.

cloud warm app to control the boiler from your mobile phone or tablet

Cloud Warm App – control on the go !

Nest and Hive controllers are Opentherm compatible, so you can use them with what we consider the best 35 kW combi on the market and a cost effective heating solution for homes heating

Common question

35kw combination 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.

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 with great hot water performance 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.