The Ideal HP290 Single Zone Pre-Plumbed Cylinder is the simplest configuration in the HP290 range — a factory-assembled indoor hydraulic unit for straightforward properties running one heating zone, with no buffer or low loss header. Every cylinder ships fully pre-plumbed and pre-wired with the HP290 control box, circulation pump, diverter valve, magnetic filter, G3 unvented safety kit and a 3 kW immersion heater — the installer connects primary flow/return, DHW, cold feed and electrics, with no on-site hydraulic assembly required.
HP290 heat pump compatibility only
This cylinder range is designed exclusively for the Ideal HP290 R290 heat pump — the control box, wiring and pre-plumbed hydraulics are matched to the HP290 platform and are not a generic fit for other manufacturers' heat pumps.
G3-qualified installer required
Every HP290 cylinder is unvented and includes a full G3 safety kit. UK Building Regulations require the DHW side to be commissioned by a G3-qualified installer. Failure to install and commission to Ideal's instructions may invalidate the warranty.
Simplest configuration in the range
This is the plain pre-plumbed configuration — no integrated buffer or low loss header. Choose this where your property runs a single heating zone and your installer's system design doesn't call for extra hydraulic separation.
Choose your capacity
| Capacity |
Format |
Model code |
Best for |
| 150 L |
Slimline |
IDEPLUHP150PPSZSL |
Compact airing cupboards, single-zone heating only |
| 180 L |
Slimline |
IDEPLUHP180PPSZSL-D8 |
Narrow-footprint installs needing slightly more DHW |
| 180 L |
Standard |
IDEPLUHP180PPSZ |
Typical 2–3 bedroom single-zone systems |
Why choose the Single Zone Pre-Plumbed Cylinder
Compact, simple hydraulics
No integrated buffer or low loss header means a smaller overall footprint and the most straightforward pre-plumbed configuration in the HP290 range — ideal where system design doesn't call for extra hydraulic volume.
Slimline format available
Both 150 L and one 180 L variant are offered in a narrower Slimline cabinet — suited to constrained airing cupboards.
Fully pre-plumbed and pre-wired
Circulation pump(s), 3-port diverter valve, magnetic filter, G3 safety kit and the HP290 control box all factory-fitted and wired. The installer connects primary, DHW, cold feed and mains power — no on-site hydraulic assembly.
Industry-leading reheat times
Multi-coil heat exchanger design engineered for fast DHW recovery even at the lower flow temperatures typical of heat pump operation — Ideal specifically call out reheat performance as a differentiator for the HP290 cylinder range.
HP290 control box included
The control box consolidates all electrical components and provides the homeowner-facing interface — smart grid and solar PV compatible, with Wi-Fi connectivity and Anti-Legionella scheduling built in.
G3 unvented safety kit as standard
Every cylinder includes the pressure/temperature relief valve, expansion vessel and discharge pipework needed to meet Part G3 of the Building Regulations for unvented hot water storage.
3 kW immersion heater
Every HP290 cylinder is fitted with a 3 kW immersion as standard — backup DHW heating and Anti-Legionella disinfection support alongside the heat pump.
Specification (all capacities)
| Range |
Ideal HP290 Pre-Plumbed DHW Cylinder — Single Zone Pre-Plumbed Cylinder |
| Available capacities |
150 L (Slimline) / 180 L (Slimline or Standard) |
| Compatible heat pump |
Ideal HP290 R290 monobloc (exclusive fit) |
| Tank construction |
Duplex stainless steel |
| DHW type |
Unvented — full G3 safety kit included |
| Backup heater |
3 kW immersion (fitted as standard) |
| Control box |
HP290 Control Box (included) — smart grid and solar PV compatible |
| Anti-Legionella |
Weekly disinfect cycle to 60°C for 15 minutes (default), heat pump + immersion |
| Minimum system water flow rate |
At least 30 litres/minute recommended into the property |
| Optimum inlet pressure |
3 bar dynamic (will function at lower pressure with reduced performance) |
| Primary system minimum volume (HP290 platform) |
40 litres free system volume |
| Compatible controllers |
Ideal HP290 Controller or Ideal Halo Lite RF programmable room thermostat |
| Warranty |
Ideal HP290 platform warranty — up to 5 years parts and labour when registered within 30 days and serviced annually |
What's in the box (every capacity)
- Ideal HP290 pre-plumbed DHW cylinder — Single Zone Pre-Plumbed Cylinder (capacity per selected variant)
- HP290 Control Box — pre-wired
- Circulation pump(s) — pre-plumbed
- 3-port diverter valve — pre-plumbed
- Magnetic system filter — pre-fitted
- Full G3 unvented safety kit (expansion vessel, T&P relief valve, discharge pipework components)
- 3 kW immersion heater — pre-fitted
- Manufacturer installation and maintenance documentation
What you'll also need (sold separately)
- Ideal HP290 R290 monobloc heat pump (matched capacity — see our HP290 heat pump listings)
- Ideal Halo Lite RF programmable room thermostat, or use the HP290 Controller as room thermostat
- Discharge pipework to a suitable tundish and drain point per G3 requirements
- Anti-freeze protection on any pipework exposed to ambient temperatures below 5°C
- System inhibitor dosing per BS 7593:2019
Frequently Asked Questions
Which capacity should I choose?
150 L Slimline suits the most space-constrained single-zone installs. 180 L (Slimline or Standard) gives more DHW headroom for typical 2–3 bedroom single-zone systems — choose Slimline only if cupboard width is genuinely tight, as it doesn't add extra capacity or functionality over Standard.
Is this suitable for two-zone heating?
No — this configuration is single-zone only. If your property runs underfloor heating and radiators (or two areas) at different flow temperatures, see our HP290 Two Zone cylinder listings instead.
Do I need a G3-qualified installer?
Yes — every HP290 cylinder is an unvented hot water cylinder. UK Building Regulations require the DHW side to be commissioned by a G3-qualified installer. Failing to install and commission to Ideal's manufacturer instructions may invalidate the warranty.
What's included in the control box?
The HP290 Control Box consolidates the electrical components for the whole system and gives the homeowner-facing interface for heating and DHW schedules, Anti-Legionella cycling, and Wi-Fi connectivity. It's smart grid and solar PV compatible as standard, and is included in every pre-plumbed cylinder.
Is a room thermostat included?
The HP290 Controller can itself function as a room thermostat if no separate programmable room thermostat is fitted. For a dedicated wireless room thermostat experience, Ideal's Halo Lite RF is the compatible option — sold separately.
Can this cylinder be used with a different heat pump?
No — the HP290 pre-plumbed cylinder range is designed exclusively for the Ideal HP290 R290 heat pump. The control box, wiring and pre-plumbed hydraulics are matched specifically to that platform and are not a generic unvented cylinder for other manufacturers' systems.
