Air-to-Water · R290 · Monobloc
Ideal HP290
The Ideal HP290 is a monobloc air-source heat pump using R290 natural refrigerant. Designed for the UK climate, it provides low-carbon heating and domestic hot water, with flow temperatures of up to 75°C in suitable operating conditions.
It can be designed for homes with radiators, underfloor heating, or a combination of both — subject to a property survey and heat-loss calculation.
Features
- Intuitive control: smart weather compensating controls
- Low Carbon R290 refrigerant
- High temperature output
- Flow temperatures up to 75°C
- Smart grid and solar PV compatible
- Compatibility: radiator and underfloor heating systems
- Domestic hot water: hot, efficient and fast re-heat times
Why consider the Ideal HP290?
- R290 natural refrigerant.
- Monobloc outdoor-unit design.
- Flow temperatures up to 75°C.
- Suitable for radiator and underfloor-heating systems, subject to assessment.
- Smart weather-compensating controls.
- Compatible with smart-grid and solar-PV systems.
- Compatible with Ideal heat-pump cylinders.
- MCS-certified model range.
- Two-year warranty when registered within 30 days of installation and serviced annually, subject to Ideal’s terms and conditions.
HP290 heat-pump outputs
Six outputs from 4.5 kW to 14 kW. The correct model is selected from the property's calculated heat loss — not simply from the existing boiler size or floor area.
| Model | Nominal output | Ideal product code |
|---|---|---|
| HP290 4.5 kW | 4.5 kW | 241486 |
| HP290 6 kW | 6 kW | 241487 |
| HP290 8 kW | 8 kW | 241488 |
| HP290 10 kW | 10 kW | 241489 |
| HP290 12 kW | 12 kW | 241490 |
| HP290 14 kW | 14 kW | 241491 |
Ideal HP290 cylinder options
The HP290 pairs with an Ideal heat-pump cylinder for domestic hot water. Capacity and configuration follow household size, demand, available space and the heating-system layout — confirmed on survey.
Pre-plumbed with integrated buffer
Packaged cylinder with integrated buffer, control box, pumps, valves, sensors and associated hydraulics, depending on the selected model. Capacities from 180 to 300 litres; single-zone and two-zone; standard-width and slimline where available.
Pre-plumbed with control box
Factory-prepared cylinder and controls without an integrated buffer — 150 to 300 litres, standard and slimline, single- or two-zone, with low-loss-header configurations where required.
Standalone heat-pump cylinders
For bespoke hydraulics or where a pre-plumbed package is not required — 150 to 300 litres, including slimline 180-litre and 210-litre versions.
Choosing a cylinder size
An initial guide only. Sizing should account for occupants, bathrooms, peak usage, recovery time and any secondary hot-water return.
| Household or property requirement | Cylinder option to investigate |
|---|---|
| Smaller household with moderate hot-water demand | 150 or 180 litres |
| Typical family home | 180 or 210 litres |
| Larger household or higher demand | 250 litres |
| Larger home, multiple bathrooms, or greater stored demand | 300 litres |
| Restricted cylinder cupboard or narrow access | 180 or 210-litre slimline |
| Separate heating zones | Two-zone configuration |
| Packaged installation with hydraulic support | Pre-plumbed cylinder with integrated buffer |
| Bespoke system arrangement | Standalone heat-pump cylinder |
Which cylinder arrangement may suit you?
Pre-plumbed with integrated buffer
Attractive where a neat packaged install is preferred, installation time needs to be minimised, hydraulic support is required, or the property has one or two heating zones with enough space for the packaged unit.
Pre-plumbed with control box
Suits factory-prepared controls and a simplified install where the cylinder and heating arrangement stay separate — one-zone, two-zone or low-loss-header configurations as needed.
Standalone cylinder
For bespoke plant rooms, separate pumps and controls, slimline space constraints, or specific pipework layouts.
Existing cylinders, radiators and zones
An existing cylinder should not automatically be assumed suitable for the HP290. The installer checks coil size and heat-transfer area, storage capacity, condition and insulation, sensors, recovery time, immersion provision, pipework and safety components, and compatibility with the selected controls.
The HP290 can work with radiators and underfloor heating, but each room and circuit must be assessed — heat loss, radiator output at the proposed flow temperature, UFH performance, pipework flow rates, heating zones, buffer or low-loss-header needs, and balancing. Larger radiators may be needed in some rooms so the heat pump can operate efficiently at a lower flow temperature.
A complete HP290 system may include
- Ideal HP290 outdoor unit.
- Ideal heat-pump cylinder.
- Integrated buffer or low-loss header, where required.
- Control box and system controls.
- Heating circulation pumps and temperature sensors.
- Immersion heater and weather-compensating controls.
- Radiator or underfloor-heating modifications.
- Frost protection and insulated external pipework.
- Electrical isolators and protection.
- Solar-PV or smart-grid interface, where planned.
The exact equipment list is confirmed in the survey and quotation.
What Pretium Synergy will assess
Before recommending a system, we review whether Ideal HP290 — and which output and cylinder arrangement — is appropriate for your home.
- Property size and construction, and room-by-room heat loss.
- Existing boiler, controls, radiators, pipework and circulation.
- Existing hot-water cylinder and required capacity.
- Outdoor-unit position, noise and clearances.
- Electrical supply.
- Solar PV, battery and EV-charging plans.
- Planning, building-regulation and installation requirements.
Register interest
Considering an Ideal HP290 with a compatible hot-water cylinder? Tell 
Current about your home, heating system and hot-water needs — we'll discuss output sizing, cylinder options and the next step. No online checkout.
Ideal's HP290 range uses R290 refrigerant and is specified with compatible heat-pump cylinder options, including pre-plumbed and standalone cylinders in capacities ranging broadly from 150 to 300 litres. Final selection needs a qualified survey, room-by-room heat-loss calculation, radiator and pipework assessment, hot-water-demand review, electrical assessment and confirmation of installation space. Product availability, warranty conditions, technical specifications and cylinder compatibility should be confirmed before quotation.
