Warmflow Agentis Heat Only Pre-Pumped Oil Boiler 15–44kW

Warmflow Agentis Heat Only Pre-Pumped Boiler

The Warmflow Agentis Heat Only Pre-Pumped Oil Boiler combines high-efficiency oil boiler technology with a factory-fitted circulating pump to simplify installation and reduce the amount of additional equipment required on site.

Available across the 15–44kW output range, the Agentis pre-pumped range includes the I21P, I26P, I33P and I44P models. Each model is designed as a heat-only oil boiler and incorporates Warmflow’s stainless-steel heat exchanger technology, a Riello low-NOx burner and a factory-fitted Grundfos UPM3 FLEX AS circulating pump.

Warmflow Agentis Pre-Pumped Boiler Models

The Agentis internal pumped range is designed for indoor installation and is available with outputs from 15kW to 44kW. Warmflow lists the I21P, I26P, I33P and I44P models within its current Agentis Internal Pumped range.

Factory-Fitted Grundfos Circulating Pump

A major advantage of the pre-pumped configuration is the factory-fitted Grundfos UPM3 FLEX AS circulating pump. The pump is integrated into the boiler to help reduce installation time and simplify system installation compared with sourcing and fitting a separate circulating pump.

The pumped configuration is particularly useful for heating installations where a compact, integrated boiler solution is preferred.

Efficient Heat Exchanger Technology

Warmflow Agentis boilers use Warmflow’s patented stainless-steel heat exchanger technology together with a 5mm steel inner-shell primary heat exchanger. The design is intended to provide efficient heat transfer while maintaining a compact boiler format.

The boiler is also equipped with the latest Riello low-NOx burner technology, helping the Agentis range achieve low-emission operation while maintaining reliable oil-fired heating performance.

Heat Only Oil Boiler

The Warmflow Agentis pre-pumped model is a heat-only oil boiler, rather than a combi boiler. It is designed to provide central heating and can be used with an appropriate hot-water system where required.

This makes it suitable for heating installations where the domestic hot-water arrangement is provided separately rather than through an integrated combi system.

Internal Installation

The Agentis Internal Pumped range is designed for indoor installation, with a white casing suitable for kitchen and utility-room applications. The I21P, I26P and I33P models have dimensions of approximately 865mm high × 413mm wide × 602mm deep, while the larger I44P model is approximately 1155mm high × 595mm wide × 872mm deep.

HVO Ready

Warmflow identifies the Agentis range as HVO Ready, providing compatibility with HVO as a lower-carbon liquid-fuel option when the installation is correctly configured and commissioned in accordance with the manufacturer’s requirements.

Why Choose the Warmflow Agentis Pre-Pumped Boiler?

• 15–44kW heating output range
• I21P, I26P, I33P and I44P models
• Heat-only oil boiler configuration
• Factory-fitted Grundfos UPM3 FLEX AS circulating pump
• Warmflow stainless-steel heat exchanger technology
• 5mm steel inner-shell primary heat exchanger
• Riello low-NOx burner technology
• Designed for indoor installation
• Front service access
• Quiet operation
• HVO Ready
• Suitable for kitchen and utility-room installations
• Available for European supply through Euro Fuel Supply

Frequently Asked Questions

What is a Warmflow Agentis pre-pumped boiler?

The Warmflow Agentis pre-pumped boiler is a heat-only oil boiler supplied with a factory-fitted Grundfos UPM3 FLEX AS circulating pump. This integrated configuration helps simplify installation and reduce installation time.

What output sizes are available?

The Agentis Internal Pumped range covers 15–44kW through four models: I21P at 15–21kW, I26P at 21–27kW, I33P at 27–33kW and I44P at 33–44kW.

Is the Warmflow Agentis pre-pumped boiler a combi boiler?

No. The Agentis pre-pumped models are heat-only oil boilers. They should not be confused with the separate Agentis Internal Combi range.

What pump is fitted to the Agentis pre-pumped boiler?

Warmflow specifies a Grundfos UPM3 FLEX AS circulating pump as factory fitted on the Agentis Internal Pumped range.

Is the Agentis pre-pumped boiler suitable for indoor installation?

Yes. The I21P, I26P, I33P and I44P are part of Warmflow’s Internal Pumped range and are designed for indoor installations.

Is the Warmflow Agentis pre-pumped boiler HVO ready?

Yes. Warmflow identifies its Agentis Internal Pumped range as HVO Ready. Installation and commissioning should follow the manufacturer’s requirements for the selected fuel.

What is the difference between a heat-only and pre-pumped Agentis boiler?

The underlying appliance is a heat-only boiler, while the pre-pumped version includes the circulating pump factory fitted. This can make installation more straightforward and reduce the need for separately sourced pump components.

Is this the same as the Warmflow Agentis Professional range?

Warmflow’s documentation identifies Pumped Professional versions alongside the standard pumped models, including I21P/PRO, I26P/PRO and I33P/PRO. The current Warmflow product pages, however, present the range under the broader Agentis Internal Pumped name.

Can I buy Warmflow Agentis boilers for European projects?

Yes. Euro Fuel Supply can position this product for European customers looking for Warmflow oil heating equipment, subject to product availability and delivery arrangements.