Warmflow Agentis Internal Oil Boiler 15–21kW
Warmflow Agentis Internal Oil Boiler 15–21kW
(Approx. 3-5 working days)
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The Warmflow Agentis I21 is an internal, heat only oil fired condensing boiler designed for installation in kitchens or utility rooms. It delivers a central heating output of 15–21kW and is housed in a compact, white casing to fit seamlessly into indoor spaces.
This oil boiler operates on kerosene and is HVO ready for renewable liquid fuels. It features a patented 5mm stainless steel heat exchanger for improved thermal efficiency and incorporates a Riello low NOx burner to meet current emission standards. The boiler is ErP A-rated for energy efficiency, classified as NOx Class 3, and has a SAP seasonal efficiency of 91%. Noise emissions are approximately 52 dB(A), ensuring quiet operation.
The I21 offers front service access and multiple flue options, including conventional and balanced flue configurations. Connections include a 28mm flow and 1" BSP return. Its design prioritises ease of installation and servicing while maintaining high performance.
- Output range: 15–21kW for central heating
- Compact casing for kitchen or utility room installation
- Patented 5mm stainless steel heat exchanger for efficiency
- Riello low NOx burner (NOx Class 3) reduces emissions
- SAP seasonal efficiency: 91%
| Brand | Warmflow |
|---|---|
| Width | 413 mm |
| Energy Rating | Not Selected |
| Depth | 602 mm |
| Flue Included | No |
| Fuel Type | Kerosene & HVO |
| Heating Energy Rating | A |
| Heat Output Range | 15–21kW |
| Height | 865 mm |
| Heating Output | 21 kW |
| Min Heat Output | 15 |
| Model Name / No | I21 |
| Colour | White |
| Mount Type | Floor Mounted |
| Hydrogen Ready | No |
| NOx Class | Class 3 |
| Residential Warranty | 2 years standard (extendable to 5 years) |
| Sound Power Level (dB A): | 52 dB |
| Burner Type | Riello RDB 2.2 |
| Seasonal Efficiency | 91% |
- Delivery cost will be calculated at checkout once delivery address has been confirmed
- Delivery lead times are an estimate only
- Delivery drivers will always prioritise safety over convenience when offloading materials
- Bagged products such as cement and plaster cannot be returned once opened
- Jumbo bags cannot be returned once delivered
- All other goods may be returned within 3 months with a proof of purchase provided
- Chargeable pallets may be returned for a full refund
- All online pricing is specific to Northern Ireland only. Pricing for our Isle of Man branch may vary.
The Warmflow Agentis I21 is an internal, heat only oil fired condensing boiler designed for installation in kitchens or utility rooms. It delivers a central heating output of 15–21kW and is housed in a compact, white casing to fit seamlessly into indoor spaces.
This oil boiler operates on kerosene and is HVO ready for renewable liquid fuels. It features a patented 5mm stainless steel heat exchanger for improved thermal efficiency and incorporates a Riello low NOx burner to meet current emission standards. The boiler is ErP A-rated for energy efficiency, classified as NOx Class 3, and has a SAP seasonal efficiency of 91%. Noise emissions are approximately 52 dB(A), ensuring quiet operation.
The I21 offers front service access and multiple flue options, including conventional and balanced flue configurations. Connections include a 28mm flow and 1" BSP return. Its design prioritises ease of installation and servicing while maintaining high performance.
- Output range: 15–21kW for central heating
- Compact casing for kitchen or utility room installation
- Patented 5mm stainless steel heat exchanger for efficiency
- Riello low NOx burner (NOx Class 3) reduces emissions
- SAP seasonal efficiency: 91%
| Brand | Warmflow |
|---|---|
| Width | 413 mm |
| Energy Rating | Not Selected |
| Depth | 602 mm |
| Flue Included | No |
| Fuel Type | Kerosene & HVO |
| Heating Energy Rating | A |
| Heat Output Range | 15–21kW |
| Height | 865 mm |
| Heating Output | 21 kW |
| Min Heat Output | 15 |
| Model Name / No | I21 |
| Colour | White |
| Mount Type | Floor Mounted |
| Hydrogen Ready | No |
| NOx Class | Class 3 |
| Residential Warranty | 2 years standard (extendable to 5 years) |
| Sound Power Level (dB A): | 52 dB |
| Burner Type | Riello RDB 2.2 |
| Seasonal Efficiency | 91% |
- Delivery cost will be calculated at checkout once delivery address has been confirmed
- Delivery lead times are an estimate only
- Delivery drivers will always prioritise safety over convenience when offloading materials
- Bagged products such as cement and plaster cannot be returned once opened
- Jumbo bags cannot be returned once delivered
- All other goods may be returned within 3 months with a proof of purchase provided
- Chargeable pallets may be returned for a full refund
- All online pricing is specific to Northern Ireland only. Pricing for our Isle of Man branch may vary.