80kw Boiler – gas fired condensing

Our gas fired 80kW boiler is available in natural gas or for LPG applications. They are a high performance “A” rated ErP condensing boiler, and offer enhanced performance that exceeds the Part L building regulations for seasonal energy efficiency requirements.

This unit can be used for space heating, central heating, and domestic hot water production via a plate heat exchanger or indirect hot water cylinder or water heaters

Efficiency features: with a modulation ratio of 20:1, the automatic part load adjustment offers superb outputs down to 3.5 kw of heating output, which leads to better heat load matching of the system and lower fuel consumption and energy bills.

This energy efficient commercial boiler also has two stainless steel heat exchangers in one boiler as such, which ensures redundancy for your heating system; if one heat exchanger module fails, you still have up to 50% of your duty available. This feature can be vital in a commercial specification for a building that can’t be without some heat.

Wall Hung Gas Commercial Boiler

With the option of installing the boiler as a wall to wall solution or arranged inline on a free standing frame kit to offer enhanced performance.

The 80kW gas fired condensing boiler mounted on a free-standing frame kit with low loss header and plate heat exchanger of domestic hot water production.

We can provide a solution for every commercial specification, as we can cascade these high performance gas boilers up to 960 kW with automatic part load adjustment if so required.

For more details on this – please click here- cascading our commercial gas boilers 

80kW commercial wall-hung boilers

As each boiler (heat exchanger) has its own flue non-return valve, you can service either boiler heat exchanger module without shutting the space heating system down.

Our energy efficient gas boilers are fitted with fully modulating low NOx burners (Class 6 combustion levels) and fan for low carbon solutions.

R1K75 gas condensing boiler output and energy efficiency figures – Part L building regulations

The latest revisions to Part L of the Building Regulations that came into force on June 15, 2023, mean that all new wet central heating systems should be sized for a maximum heating flow temperature of 55°C (previously 75°C plus boiler flow temperature were allowed), as required by Part L1A, and preferably lower if possible to achieve the maximum condensing effect of boilers.

Thus, our gas boiler will produce 79.35 kW ( close enough to 80 kW for us) when the heating system flow and return temperatures are 50/30 °C. However, should you require more kW output, please look at the next size boiler up our 100kW boiler which again is available in natural gas or for lpg applications and offers superb outputs up to 106.8 kW.

The unit will also provide 72.83 kW at 80/60 °C if you have a process heating application that is not covered in the Part “L” building regulations.

Full Data is shown in the following –

Output and energy efficiency figures for our R1K75

This is detailed in our full manual which can be downloaded here –

Manual for R1K 75 Gas condensing boiler – Internal version Flexiheat UK

Should you require a larger output gas boiler (we do up to 240 kW in a single boiler), then we do a full range, which is listed here.

Commercial gas condensing boilers 

Specifications

• “A” rated wall hung boiler – for commercial use or very large home heating applications.

• Energy efficient condensing boilers up to 105.8 % at 100% heat input at 50/ 30°C

• Stainless steel heat exchanger with 28mm diameter water ways that ensure the boiler from very low pressure drops, guarantees lower risks of clogging (more resistance to fouling up), greater thermal efficiency, and greater ease of cleaning.

• Intelligent fault system: if the boiler has a fault, it will tell you exactly what has gone wrong, i.e., if the heating system pressure is too low, etc.

• Pressure sensor to monitor system pressure as part of the intelligent fault system

• Maximum heating operating system pressure = 3 Bar

• Maximum heating operating system pressure = 0.3 Bar

• Can be controlled by an “Opentherm” controller, such as a “Hive” or “Nest” type, which means you can control the boiler on the go from your mobile phone, tablet, or PC, just like our full range of smaller domestic counterparts that we supply.

• BMS compatible with our 0-10 Volt free contact kit

Dimensions of this commercial boiler: 80 kW gas-fired

This commercial boiler has the following compact dimensions:

A small compact energy efficient gas condensing boiler 80 kW with ErP “A” rated for central heating (radiators or underfloor heating) and domestic hot water via an indirect domestic hot water cylinder.

Connection details at the bottom of the unit: flow and return connections, gas connection, and condensate drain.

Free standing boiler frame detail

The gas condensing boiler on a free standing frame kit with low loss header.

80kW gas system boiler

Are these an 80kW gas system boiler? Yes, in that they have a pump (two actually, i.e., one for each heat exchanger module), but at this size of system boiler, we can’t fit an expansion vessel within the boiler casing, so one needs to be fitted to the pipework external to the boiler to make the unit a full system boiler.

Flue options

Each heat exchanger module has its own flue exit. You can either individually flue each unit with a co-axial flue (80mm/125mm) should you wish to go room sealed up to 10 metres vertically or horizontally. However, if you use a split flue system, you can go up to 40 metres vertically or horizontally.

The last option is a common flue header for the boiler.

Common flue pipe header option

Gas-fired 80 kW Boiler

Should you require more product information, check stock, technical support, or prices on our high performance 80kw boiler in natural gas or LPG ,then please don’t hesitate to contact our sales team on 01202 822221 or use our email contact form via the contact tab above to message us.