Agentis Internal System

Using Warmflow’s unique patented heat exchanger and Riello Low NOx technology with a sealed system kit.

Combines Warmflow's unique patented stainless steel heat exchanger & Riello low NOx technology along with a factory fitted sealed system kit to ensure seamless integration into any indoor application.

Register on Connect Manuals / Brochures ERP Labels Servicing

Boiler Stats

Models I21S I26S I33S
Models I21S I26S I33S
Output (kW) 15-21 21-27 27-33
Flue Options C/F, low/ high/ vertical B/F C/F, low/ high/ vertical B/F C/F, low/ high/ vertical B/F
C/F size (mm) 100 100 100
ErP Heating Rating rating rating rating
Height (mm) 865 865 865
Depth (mm) 602 602 602
Width (mm) 413 413 413
Flow Connection 28mm 28mm 28mm
Return Connection 22mm 22mm 28mm
Service Access front front front
DHW Flow (I/min) n/a n/a n/a
WFP

The next generation of oil boilers

  • Teddington fire valve with 9m capillary
  • Oil line installation kit with an oil filter
  • ADEY Magnaclean pro 2 filter
  • Pre Wired Grundfos UPM3 Flex AS Circulating Pump
  • Includes 2 Bottles of Inhibitor
discover the benefits of the professional range

Explore other models

Internal heat only stickers

Agentis Internal Heat Only

I21 / I26 / I33 / I44
  • Warmflow’s unique, patented 5mm stainless steel heat exchanger technology
  • Latest Riello low NOx burner
  • Stylish white casing suitable for all indoor installations
  • Outputs ranging from 15-44kW
  • Quiet operation
  • HVO Ready
View boiler details
Internal pumped stickers

Agentis Internal Pumped

I21 P / I26 P / I33 P / I44 P
  • Warmflow’s unique, patented 5mm stainless steel heat exchanger technology
  • Latest Riello low NOx burner
  • Factory fitted Grundfos UPM3 FLEX AS circulating pump
  • Stylish white casing suitable for all indoor installations
  • Outputs ranging from 15-44kW
  • Quiet operation
  • HVO Ready
View boiler details
Internal combi stickers

Agentis Internal Combi

I21 C / I26 C / I33 C
  • Warmflow’s unique, patented 5mm stainless steel heat exchanger technology
  • Latest Riello low NOx burner
  • One of the slimmest combi oil boilers on the market at 515mm wide
  • Stylish white casing to fit any kitchen or utility room
  • Factory fitted hinged 24ltr expansion vessel, 32 plate heat exchanger
  • Factory fitted pressure reducing & relief valves as standard
  • Factory fitted Grundfos UPM3 FLEX AS circulating pump
  • Outputs ranging from 15-33kW
  • Quiet operation
  • HVO Ready
View boiler details