Ideal Logic Air DHW Pre-Plumbed Cylinder with Buffer 250L 2 Zone
Ideal Logic Air DHW Pre-Plumbed Cylinder with Buffer 250L 2 Zone
The Ideal Logic Air 250 L is a two zone pre-plumbed DHW cylinder with integrated buffer, supplied fully pre-plumbed, pre-wired and configured for the Logic Air heat pump range. It holds 239 litres of stored hot water alongside a 63.5 litre integrated buffer, and reheats from 10 °C to 50 °C in 26.56 minutes.
A pre-plumbed cylinder arrives with the heat pump's hydraulics already built onto it and wired into a factory-fitted control box. This version carries an integrated buffer tank for defrost volume and stable modulation, and controls two heating zones independently — underfloor downstairs and radiators upstairs, typically.
The buffer matters more than it looks. A heat pump needs a minimum volume of water open to it at all times so it can reverse the cycle to defrost the outdoor coil, and radiators sitting behind thermostatic valves do not count towards that volume. Without a buffer or a volumiser most retrofits cannot meet the requirement, so building one into the cylinder cabinet saves both the floor space and a second set of connections.
What is included
Every item below is factory fitted and wired before the cylinder leaves Ideal:
- Control box
- Buffer tank
- Heat pump filter
- DHW 3-port valve
- P&T relief valve
- High temperature cut out
- Expansion vessel
- Pressure gauge
- Automatic air vent(s)
- Isolation valves
- 3 kW immersion heater
- Circulation pump(s)
- Flow and return thermistors
- DHW thermistor
- Outdoor sensor
Specification
| Stored hot water capacity | 239 litres |
| Integrated buffer volume | 63.5 litres |
| Energy efficiency class | B |
| Standing heat loss | 62 W |
| Reheat time, 10 °C to 50 °C | 26.56 minutes |
| Primary heat exchanger surface area | 2.5 m² |
| Immersion heater | 3 kW |
| Secondary return connection | Yes |
| Overall dimensions (W × D × H) | 705 × 780 × 1,908 mm |
| Cylinder diameter | 630 mm |
| Cylinder height | 1,829 mm |
| Weight empty | 80 kg |
| Weight full | 382 kg |
| Cylinder material | Stainless steel |
| Ideal product code | 236211 |
Reheat time is measured to HWA Heat Pump Test 002:2020, 0.42 l/s at 55 °C flow temperature. Check the full weight against the floor before siting a cylinder this size: at 382 kg it is a structural consideration, not just a plumbing one.
Warranty
25 years on the stainless steel cylinder, plus 2 years parts and labour on components. Ideal's terms and conditions apply, including registration and annual servicing.
Works with these heat pumps
This cylinder is supplied configured for the Ideal Logic Air range:
- Ideal Logic Air — Ideal Logic Air 4.0kW Air Source Heat Pump, Ideal Logic Air 5.0kW Air Source Heat Pump, Ideal Logic Air 8.0kW Air Source Heat Pump and the rest of the heat pump range
Additional suggested items
Commonly ordered alongside a pre-plumbed cylinder:
- Ideal Magnetic Filter — captures the magnetite a strainer cannot, protecting the plate heat exchanger
- Intatec Zero Anti-Freeze Valve 28mm — mechanical frost protection for the external pipework, works without power
- Ideal Flexible Hose 500mm — pre-insulated, vibration-absorbing final connection to the unit
The datasheet, installation manual and user guide are in the Documents tab above. Pricing a full system? Contact our sales team at sales@clearraysolar.com.
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Delivery times vary by region:
- UK — 1-2 business days
- Highlands & Islands — 1-2 business days
Returns accepted within 14 days of delivery for unused items in original packaging.
