The Megaflo Eco Direct 300L (4-Immersion) is a high-output unvented hot water cylinder designed for large properties, holiday lets and high-demand applications where rapid electric recovery is essential. With four 3kW titanium immersion elements delivering 12kW total output, it provides a 73-minute heat-up time across the full 300-litre capacity, while delivering up to 76 litres per minute at 3 bar.
The cylinder features 60mm CFC-free polyurethane foam insulation and an internal floating baffle, eliminating the need for an external expansion vessel. It is supplied with a factory-fitted T&P valve, 3 bar PRV, tundish and full unvented kit for a complete installation solution.
300L Capacity
12kW Total Output
4 × 3kW Titanium Elements
ErP C
Nominal capacity
300 litres
Max flow at 3 bar
76 l/min
Applications & suitability
Large Properties
300-litre hot water storage for properties with substantial domestic hot water requirements.
Holiday Lets
Suitable for holiday lets where high hot water demand can require fast electric recovery.
High-Demand Applications
Designed around a 12kW total immersion output for demanding hot water requirements.
High Flow Demand
Provides a maximum stated flow rate of 76 litres per minute at 3 bar.
Key specifications
| Nominal capacity |
300 litres |
| Height |
2053mm |
| Width × Depth |
579 × 600mm |
| Weight empty / full |
58kg / 339kg |
| Standing heat loss |
1.69 kWh/24h |
| Max flow at 3 bar |
76 l/min |
| Immersion heaters |
4 × 3kW titanium @ 240V (12kW total) |
| Heat-up time |
73 min (all elements) |
| Operating pressure |
3 bar |
| ErP rating |
C |
| Product code |
95050478 |
Installation & compatibility
The Megaflo Eco Direct 300L uses four 3kW titanium immersion elements at 240V, providing a combined 12kW electrical output. Its internal floating baffle removes the requirement for an external expansion vessel, while the factory-fitted T&P valve, 3 bar PRV, tundish and full unvented kit support the installation of the cylinder as a complete unvented hot water system.
Design & performance benefits
12kW Total Immersion Output
Four 3kW titanium immersion elements provide a combined 12kW output.
73-Minute Heat-Up
All four elements provide a stated 73-minute heat-up time for the 300-litre cylinder.
60mm Insulation
60mm CFC-free polyurethane foam insulation supports reduced standing heat loss.
Internal Floating Baffle
The internal floating baffle means no external expansion vessel is required.
Additional installation features
Factory-Fitted T&P Valve
Supplied with a factory-fitted temperature and pressure relief valve.
3 Bar PRV & Tundish
Includes a 3 bar pressure reducing valve and tundish as part of the unvented kit.
Made in the UK
Manufactured in the UK and supplied with a lifetime domestic guarantee.
Ideal for
Large Homes
300-litre capacity for larger domestic hot water storage requirements.
Holiday Lets
A high-capacity cylinder for properties with potentially high and variable hot water demand.
High-Demand Properties
12kW total immersion output and 73-minute heat-up for high-demand electric hot water applications.
Multiple Hot Water Outlets
300-litre storage and up to 76 l/min at 3 bar for applications requiring substantial hot water flow.
The Megaflo Eco Direct 300L (4-Immersion) combines 300-litre unvented hot water storage with 12kW of titanium immersion heating, a 73-minute full heat-up time and 76 l/min maximum flow at 3 bar. With 60mm insulation, an internal floating baffle and factory-fitted unvented components, it is designed for large properties, holiday lets and high-demand applications requiring high-capacity electric hot water recovery.
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Customers can also choose to collect their order from our store in
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