Warmflow

Founded in 1970, Warmflow is Northern Ireland’s leading manufacturer of oil-fired boilers, It’s award winning range includes combi, regular and system boilers, as well as cylinders and heat pumps. 

Known for its continual innovation, Warmflow designed the UK and Ireland’s first AA rated combi oil boiler and has gone even further in its goal for improved efficiency with the introduction of a AAA rated boiler (the only company to offer this). Warmflow states this can save homeowners an average saving of 5 litres of fuel per week compared to other oil boilers. 

Warmflow boilers are known for their reliability, high-build quality and use of quality components. All of the Warmflow Agentis boilers also come with a standard parts and labour warranty of 5 years. 

Warmflow oil-fired combi boilers

The main benefit of a combi boiler is that everything needed to produce hot water is contained in the one unit. This means that unlike regular and system boilers there is no requirement to install a cylinder and/or cold water water storage tank. 

Combi boilers are highly efficient and with no water cylinder to heat up, are capable of producing hot water on demand. 

Warmflow’s Agentis combi boilers are available in a range of outputs from 21kW to 33kW, making them suitable for small to large family sized homes. If space is at a premium inside your house, then you also have the option of choosing an external model which can be installed outside your property. 

All of the combi boilers are fitted with a stainless steel heat exchanger and the latest Riello NOx burner technology designed to increase efficiency. 

Boiler model kW Output Efficiency Warranty Price
Warmflow Agentis Internal Combi 21kW Oil Boiler 21kW AAA 5 years £2,170
Warmflow Agentis Internal Combi 26kW Oil Boiler 26kW AAA 5 years £2,270
Warmflow Agentis Internal Combi 33kW Oil Boiler 33kW AAA 5 years £2,470
Warmflow Agentis External Combi 21kW Oil Boiler 21kW AA 5 years £2,300
Warmflow Agentis External Combi 26kW Oil Boiler 26kW AA 5 years £2,500
Warmflow Agentis External Combi 33kW Oil Boiler 33kW  AA  5 years £2,710
Warmflow Agentis Pro Internal Combi 21kW Oil Boiler 21kW AA 5 years £2,500
Warmflow Agentis Pro Internal Combi 26kW Oil Boiler 26kW  AA  5 years  £2,630
Warmflow Agentis Pro Internal Combi 33kW Oil Boiler 33kW  AA  5 years  £2,830
Warmflow Agentis Pro External Combi 21kW Oil Boiler 21kW AA 5 years £2,650
Warmflow Agentis Pro External Combi 26kW Oil Boiler 26kW  AA  5 years  £2,710
Warmflow Agentis Pro External Combi 33kW Oil Boiler 33kW  AA  5 years  £2,900

Warmflow oil-fired regular boilers

Regular boilers work by taking a supply of cold water from a storage tank (usually installed in a loft) which the boiler heats up and transfers to a hot water cylinder where it is stored until it is needed. Although regular boilers take up more space compared to combi boilers, they are able to deliver high volumes of water to multiple outlets at the same time. 

Warmflow’s Agentis regular boilers are available in a range of outputs from 21kW to 44kW and come with a standard parts and labour warranty of 5 years. 

Boiler model kW Output Efficiency Warranty Price
Warmflow Agentis Internal Heat Only 21kW Oil Boiler 21kW A heat 5 years £1,300
Warmflow Agentis Internal Heat Only 26kW Oil Boiler 26kW A heat 5 years £1,360
Warmflow Agentis Internal Heat Only 33kW Oil Boiler 33kW A heat 5 years £1,560
Warmflow Agentis Internal Heat Only 44kW Oil Boiler 44kW A heat 5 years £1,700
Warmflow Agentis Internal Pumped 21kW Oil Boiler 21kW A heat 5 years £1,440
Warmflow Agentis Internal Pumped 26kW Oil Boiler 26kW  A heat 5 years £1,440
Warmflow Agentis Internal Pumped 33kW Oil Boiler 33kW A heat 5 years £1,530
Warmflow Agentis Internal Pumped 44kW Oil Boiler 44kW  A heat 5 years  £1,900
Warmflow Agentis External Heat Only 21kW Oil Boiler 21kW A heat 5 years  £1,560
Warmflow Agentis External Heat Only 26kW Oil Boiler 26kW  A heat  5 years  £1,590 
Warmflow Agentis External Heat Only 33kW Oil Boiler 33kW  A heat  5 years  £1,920 
Warmflow Agentis External Heat Only 44kW Oil Boiler 44kW  A heat  5 years  £2,100 
Warmflow Agentis External Pumped 21kW Oil Boiler 21kW  A heat  5 years  £1,680 
Warmflow Agentis External Pumped 26kW Oil Boiler 26kW  A heat  5 years  £1,740 
Warmflow Agentis External Pumped 33kW Oil Boiler 33kW  A heat  5 years  £2,110 
Warmflow Agentis External Pumped 44kW Oil Boiler 44kW  A heat  5 years  £2,500 
Warmflow Agentis Boilerhouse 21kW Oil Boiler 21kW A heat  5 years   £1,170
Warmflow Agentis Boilerhouse 26kW Oil Boiler 26kW  A heat   5 years   £1,170 
Warmflow Agentis Boilerhouse 33kW Oil Boiler 33kW  A heat   5 years   £1,370 
Warmflow Agentis Pro Internal Pumped 21kW Oil Boiler 21kW  A heat   5 years   £1,760 
Warmflow Agentis Pro Internal Pumped 26kW Oil Boiler 26kW  A heat   5 years   £1,850 
Warmflow Agentis Pro Internal Pumped 33kW Oil Boiler 33kW  A heat   5 years   £1,950 
Warmflow Agentis Pro Internal Pumped 44kW Oil Boiler  44kW  A heat   5 years   £2,060 
Warmflow Agentis Pro External Pumped 21kW Oil Boiler  21kW  A heat   5 years   £1,990 
Warmflow Agentis Pro External Pumped 26kW Oil Boiler  26kW  A heat   5 years   £2,150 
Warmflow Agentis Pro External Pumped 33kW Oil Boiler  33kW  A heat   5 years   £2,400 
Warmflow Agentis Pro External Pumped 44kW Oil Boiler 44kW  A heat   5 years   £2,600 

Warmflow oil-fired system boilers

System boilers are similar to regular boilers in the fact they both require a cylinder to store hot water. However, system boilers connect to the mains water, which means you don’t need a cold water storage tank for it to function. 

The system boilers from Warmflow are all A rated and are available in a range of outputs from 21kW to 33kW. They are fitted with a stainless heat exchanger and Riello low NOx technology which help to make them A rated for efficiency.

Boiler model kW Output Efficiency Warranty Price
Warmflow Agentis Internal System 21kW Oil Boiler 21kW A 5 years £1,500
Warmflow Agentis Internal System 26kW Oil Boiler 26kW A 5 years £1,600
Warmflow Agentis Internal System 33kW Oil Boiler 33kW A 5 years £1,730
Warmflow Agentis External System 21kW Oil Boiler 21kW A 5 years £1,740
Warmflow Agentis External System 26kW Oil Boiler 26kW A 5 years £1,800
Warmflow Agentis External System 33kW Oil Boiler 33kW  A 5 years £2,000
Warmflow Agentis Pro Internal System 21kW Oil Boiler 21kW A 5 years £1,820
Warmflow Agentis Pro Internal System 26kW Oil Boiler 26kW  A 5 years  £1,890
Warmflow Agentis Pro Internal System 33kW Oil Boiler 33kW A 5 years £1,950
Warmflow Agentis Pro External System 21kW Oil Boiler 21kW A  5 years  £1,800
Warmflow Agentis Pro External System 26kW Oil Boiler 26kW  A  5 years  £2,110
Warmflow Agentis Pro External System 33kW Oil Boiler 33kW  A  5 years  £2,500