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Excellent 4.8 out of 5
Excellent 4.8 out of 5

Warmflow Agentis Pro External Combi 21kW Oil Boiler

Warmflow Agentis Pro External Combi 21kW Oil Boiler Boiler
Typical Price (inc VAT)
£2,650
Typical installation Cost (inc VAT)*
£1000 - £1500
Sundries (Filter, Flue, etc)
£300
Total Cost
£3,950 - £4,450

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Make Warmflow
Model Agentis Pro External Combi 21kW Oil Boiler
Is Condensing Yes
Efficiency Rating AA
Band Rating AA rating
LPG Compatible No
Standard Warranty 5 years
Central Heating Max. Output 21 kW
Mounting Floor standing
Flow Rate 18 l/min
Typical Price (inc VAT) £2,650
Typical installation Cost (inc VAT)* £1000 - £1500
Sundries (Filter, Flue, etc) £300
Total Cost £3,950 - £4,450
ERP Rating AA
Hot Water Max. Output 21 kW

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The Professional Agentis External Combi oil boiler from Warmflow has the same features and benefits of the Agentist External system boiler, in addition to numerous factory fitted accessories which enable quicker installation and maximises space within the system. The Agentis External Combi oil boiler is the UK & Ireland’s only AA rated oil boiler which will provide hot water for central heating and domestic use from one compact unit. Warmflow claims that this boiler can save homeowners up to 5ltrs of fuel per week compared to other leading combi oil boiler brands. The Warmflow Agentis External combi boiler uses Warmflow’s unique patented stainless steel heat exchanger with the latest Riello Low NOx burner technology to offer customers unparalleled efficiency and ease of installation. The Agentis combi also includes a factory fitted 24ltr hinged expansion vessel, a factory fitted pressure relief and reducing valve and a factory fitted DHW mini expansion vessel. This boiler is also available in 26kW and 33kW.

* This is a guide price for a straightforward, like-for-like boiler replacement. Installation costs will vary dependent on work required.

Why not compare these similar boilers?

Boiler Model kW Efficiency Warranty Typical Price

Best Sellers

Warmflow Agentis Internal System 33kW Oil Boiler 33 kw A heat 5 years £1,730 VIEW
Warmflow Agentis Internal Combi 26kW Oil Boiler 26 kw Aaa 5 years £2,270 VIEW
Warmflow Agentis Internal Combi 33kW Oil Boiler 33 kw Aaa 5 years £2,470 VIEW
Warmflow Agentis External Combi 33kW Oil Boiler 33 kw Aa 5 years £2,710 VIEW

Available

Warmflow Agentis Internal Heat Only 21kW Oil Boiler 21 kw A heat 5 years £1,300 VIEW
Warmflow Agentis Internal Heat Only 26kW Oil Boiler 26 kw A heat 5 years £1,360 VIEW
Warmflow Agentis Internal Heat Only 33kW Oil Boiler 33 kw A heat 5 years £1,560 VIEW
Warmflow Agentis Internal Heat Only 44kW Oil Boiler 44 kw A heat 5 years £1,700 VIEW
Warmflow Agentis Internal Pumped 21kW Oil Boiler 21 kw A heat 5 years £1,440 VIEW
Warmflow Agentis Internal Pumped 26kW Oil Boiler 26 kw A heat 5 years £1,440 VIEW
Warmflow Agentis Internal Pumped 33kW Oil Boiler 33 kw A heat 5 years £1,530 VIEW
Warmflow Agentis Internal Pumped 44kW Oil Boiler 44 kw A heat 5 years £1,900 VIEW
Warmflow Agentis Internal System 21kW Oil Boiler 21 kw A heat 5 years £1,500 VIEW
Warmflow Agentis Internal System 26kW Oil Boiler 26 kw A heat 5 years £N/A VIEW
Warmflow Agentis Internal Combi 21kW Oil Boiler 21 kw Aaa 5 years £2,170 VIEW
Warmflow Agentis External Heat Only 21kW Oil Boiler 21 kw A heat 5 years £1,560 VIEW
Warmflow Agentis External Heat Only 26kW Oil Boiler 26 kw A heat 5 years £1,590 VIEW
Warmflow Agentis External Heat Only 33kW Oil Boiler 33 kw A heat 5 years £1,920 VIEW
Warmflow Agentis External Heat Only 44kW Oil Boiler 44 kw A heat 5 years £2,100 VIEW
Warmflow Agentis External Pumped 21kW Oil Boiler 21 kw A heat 5 years £1,680 VIEW
Warmflow Agentis External Pumped 26kW Oil Boiler 26 kw A heat 5 years £1,740 VIEW
Warmflow Agentis External Pumped 33kW Oil Boiler 33 kw A heat 5 years £2,110 VIEW
Warmflow Agentis External Pumped 44kW Oil Boiler 44 kw A heat 5 years £2,500 VIEW
Warmflow Agentis External System 21kW Oil Boiler 21 kw A heat 5 years £1,740 VIEW
Warmflow Agentis External System 26kW Oil Boiler 26 kw A heat 5 years £1,800 VIEW
Warmflow Agentis External System 33kW Oil Boiler 33 kw A heat 5 years £2,000 VIEW
Warmflow Agentis External Combi 21kW Oil Boiler 21 kw Aa 5 years £2,300 VIEW
Warmflow Agentis External Combi 26kW Oil Boiler 26 kw Aa 5 years £2,500 VIEW
Warmflow Agentis Boilerhouse 21kW Oil Boiler 21 kw A heat 5 years £1,170 VIEW
Warmflow Agentis Boilerhouse 26kW Oil Boiler 26 kw A heat 5 years £1,170 VIEW
Warmflow Agentis Boilerhouse 33kW Oil Boiler 33 kw A heat 5 years £1,370 VIEW
Warmflow Agentis Pro Internal Pumped 21kW Oil Boiler 21 kw A heat 5 years £1,760 VIEW
Warmflow Agentis Pro Internal Pumped 26kW Oil Boiler 26 kw A heat 5 years £1,850 VIEW
Warmflow Agentis Pro Internal Pumped 33kW Oil Boiler 33 kw A heat 5 years £1,950 VIEW
Warmflow Agentis Pro Internal Pumped 44kW Oil Boiler 44 kw A heat 5 years £2,060 VIEW
Warmflow Agentis Pro Internal System 21kW Oil Boiler 21 kw A heat 5 years £1,820 VIEW
Warmflow Agentis Pro Internal System 26kW Oil Boiler 26 kw A heat 5 years £1,890 VIEW
Warmflow Agentis Pro Internal System 26kW Oil Boiler 33 kw A heat 5 years £1,950 VIEW
Warmflow Agentis Pro Internal Combi 21kW Oil Boiler 21 kw Aa 5 years £2,500 VIEW
Warmflow Agentis Pro Internal Combi 26kW Oil Boiler 26 kw Aa 5 years £2,630 VIEW
Warmflow Agentis Pro Internal Combi 33kW Oil Boiler 33 kw Aa 5 years £2,830 VIEW
Warmflow Agentis Pro External Pumped 21kW Oil Boiler 21 kw A heat 5 years £1,990 VIEW
Warmflow Agentis Pro External Pumped 26kW Oil Boiler 26 kw A heat 5 years £2,150 VIEW
Warmflow Agentis Pro External Pumped 33kW Oil Boiler 33 kw A heat 5 years £2,400 VIEW
Warmflow Agentis Pro External Pumped 44kW Oil Boiler 44 kw A heat 5 years £2,600 VIEW
Warmflow Agentis Pro External System 21kW Oil Boiler 21 kw A heat 5 years £1,800 VIEW
Warmflow Agentis Pro External System 26kW Oil Boiler 26 kw A heat 5 years £2,110 VIEW
Warmflow Agentis Pro External System 33kW Oil Boiler 33 kw A heat 5 years £2,500 VIEW
Warmflow Agentis Pro External Combi 21kW Oil Boiler 21 kw Aa 5 years £2,650 VIEW
Warmflow Agentis Pro External Combi 26kW Oil Boiler 26 kw Aa 5 years £2,710 VIEW
Warmflow Agentis Pro External Combi 33kW Oil Boiler 33 kw Aa 5 years £2,900 VIEW
Warmflow Kabin-Pak Combi KC70HEE 21kW Oil Boiler 21kw 89.1% 2 years £1,995 VIEW
Warmflow Kabin Pak Combi KC90HEE 26kW Oil Boiler 26kw 89.5% 2 years £1,975 VIEW
Warmflow Kabin Pak KC120HEE Combi 33kW Oil Boiler 33kw 89.1% 2 years £2,200 VIEW
Warmflow Utility UC70HEE Combi 21kW Oil Boiler 21kw 89.1% 5 years £1,345 VIEW
Warmflow Utility Combi UC90HEE 26kW Oil Boiler 26kw 89.1% 5 years £1,400 VIEW
Warmflow Utility UC120HEE Combi 33kW Oil Boiler 33kw 89.1% 5 years £1,990 VIEW
Warmflow Kabin Pak KS70HE System 21kW Oil Boiler 21kw 90.7% 2 years £1,417 VIEW
Warmflow Kabin Pak KS90HE System 26kW Oil boiler 26kw 90.8% 2 years £1,650 VIEW
Warmflow Kabin Pak KS120HE System 33kW Oil boiler 33kw 90.7% 2 years £1,650 VIEW
Warmflow Utility US70HE System 21kW Oil Boilers 21kw 90.7% 5 years £1,175 VIEW
Warmflow Utility US90HE System 26kW Oil boiler 26kw 90.8% 5 years £1,585 VIEW
Warmflow Utility US120HE System 33kW Oil boilers 33kw 90.7% 5 years £1,510 VIEW
Warmflow Boilerhouse B70HE 21kW Regular Oil Boiler 21kw 90.7% 7 years £1,045 VIEW
Warmflow Boilerhouse B90HE 26kW Regular Oil Boiler 26kw 90.7% 7 years £1,780 VIEW
Warmflow Boilerhouse B120HE 33kW Regular Oil Boiler 33kw 90.8% 7 years £1,225 VIEW
Warmflow Kabin-Pak K70HE 21kW Regular Oil Boiler 21kw 90.7% 7 years £1,310 VIEW
Warmflow Kabin-Pak K90HE 26kW Regular Oil Boiler 26kw 90.8% 7 years £1,345 VIEW
Warmflow Kabin-Pak K120HE 33kW Regular Oil Boiler 33kw 90.7% 7 years £1,635 VIEW
Warmflow Kabin-Pak K150HE 44kW Regular Oil Boiler 44kw 90.3% 7 years £1,915 VIEW
Warmflow Utility HE U70HE 21kW Regular Oil Boiler 21kw 90.7% 7 years £1,175 VIEW
Warmflow Utility HE U90HE 26kW Regular Oil Boiler 26kw 90.8% 7 years £1,230 VIEW
Warmflow Utility HE U120HE 33kW Regular Oil Boiler 33kw 90.7% 7 years £1,300 VIEW
Warmflow Utility HE U150HE 44kW Regular Oil Boiler 44kw 90.3% 7 years £1,795 VIEW

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Excellent 4.8 out of 5
Excellent 4.8 out of 5

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