The Megaflo Eco SystemReady 300SB 300 Litre Indirect Unvented Hot Water Cylinder is designed for system boiler installations requiring high-capacity hot water storage and simplified installation. Combining the performance of the Megaflo Eco range with factory-fitted plumbing and electrical components, it helps reduce on-site installation work and provides a neat, organised system layout.
Featuring a high-grade duplex stainless-steel inner vessel, 60mm CFC/HCFC-free polyurethane foam insulation and a factory-fitted 3kW immersion heater, the Megaflo Eco SystemReady 300SB provides dependable hot water storage for larger homes. Pre-fitted controls, safety components and wiring arrangements help streamline installation by a suitably qualified installer.
300L CAPACITY
SYSTEM BOILER READY
FACTORY-FITTED COMPONENTS
ERP RATING C
Megaflo Eco SystemReady 300SB at a Glance
39 min
Listed Heat-Up Time
76 L/min
Maximum Flow at 3 Bar
1.69
kWh/24h Standing Heat Loss
Key Features and Benefits
01. Factory-Fitted Components
Supplied with pre-fitted plumbing and wiring components, including a motorised valve, wiring centre, immersion heater and safety equipment, to help simplify installation.
02. High-Capacity Hot Water Storage
The 300-litre cylinder is designed to support larger households and properties with substantial domestic hot water requirements.
03. Duplex Stainless-Steel Vessel
The high-grade duplex stainless-steel inner vessel provides durable hot water storage for compatible indirect unvented installations.
04. 60mm Thermal Insulation
CFC/HCFC-free polyurethane foam insulation helps reduce stored-water heat loss. The listed standing heat loss is 1.69kWh per 24 hours.
05. Integrated Immersion Heating
A factory-fitted 3kW immersion heater includes a cylinder thermostat and high-limit overheat cut-out, with the controls pre-wired.
06. Integrated Expansion Arrangement
The internal floating baffle expansion vessel is built into the cylinder shell, removing the need for a separate external expansion vessel for the cylinder arrangement described.
Factory-Fitted Components
The Megaflo Eco SystemReady 300SB is supplied with key components fitted to help reduce on-site assembly and wiring work.
Immersion Heater and Controls
One 3kW immersion heater with a cylinder thermostat and high-limit overheat cut-out, pre-wired.
Temperature and Pressure Relief
Factory-fitted T&P relief valve set at 90°C / 10 bar, with T&P insulation kit fitted.
Tundish
Factory-fitted 15/22mm tundish for the cylinder discharge arrangement.
Wiring Centre and Motorised Valve
A wiring centre and 22mm 2-port motorised valve are factory-fitted and wired.
Internal Expansion Vessel
An internal floating baffle expansion vessel is integrated into the cylinder shell.
Supplied with the Cylinder
Cold Water Inlet Control Kit
The cold water inlet control kit is supplied for installation on site and comprises:
- 3 bar (0.3MPa) pressure-reducing valve.
- 8 bar (0.8MPa) pressure relief valve.
- ¼-turn isolating valve.
- Line strainer.
- Non-return valve.
- Drain valve.
The supplied kit specifications reference BS EN 1567, BS EN 1491 and EN 13959 for the relevant components.
Connections Required on Site
The installer must complete the following connections:
- Cold mains water supply to the cylinder inlet through the supplied inlet control kit.
- Hot water outlet to the property's distribution pipework.
- Primary flow and return connections from the system boiler.
- Tundish discharge pipe to a compliant termination point in accordance with applicable Building Regulations, including Part G.
- 230V electrical supply to the wiring centre.
Installation note: Unvented hot water cylinders must be installed and commissioned by a suitably qualified installer in accordance with the manufacturer's instructions and applicable regulations. Confirm the required discharge arrangements, safety devices and system compatibility before use.
Technical Specifications
| Product Information |
| Product name |
Megaflo Eco SystemReady 300SB |
| Product type |
Indirect unvented hot water cylinder |
| Product code |
95050502 |
| Nominal capacity |
300 litres |
| ERP rating |
C |
| Dimensions and Weight |
| Height |
2053mm |
| Width |
579mm |
| Depth |
710mm |
| Empty weight |
65kg |
| Full weight |
348kg |
| Performance and Heating |
| Standing heat loss |
1.69kWh/24h |
| Maximum flow at 3 bar |
76L/min |
| Maximum flow at 1 bar |
45L/min |
| Heat-up time |
39 minutes at 15L/min, 80°C primary flow, heating from 15°C to 60°C |
| Recovery time at 70% draw-off |
27 minutes |
| Backup immersion heater |
1 × 3kW at 240V |
| Pressure and Construction |
| Operating pressure |
3 bar (0.3MPa) |
| Maximum mains pressure |
16 bar (1.6MPa) |
| Minimum recommended supply pressure |
1.5 bar / 20L/min |
| Inner vessel |
High-grade duplex stainless steel |
| Insulation |
60mm CFC/HCFC-free polyurethane foam |
Frequently Asked Questions
1. What is the Megaflo Eco SystemReady 300SB?
It is a 300-litre indirect unvented hot water cylinder designed for system boiler installations, with factory-fitted plumbing and electrical components.
2. What components are factory-fitted?
The listed factory-fitted components include a 3kW immersion heater with thermal controls, temperature and pressure relief valve, tundish, wiring centre, 22mm 2-port motorised valve and internal floating baffle expansion vessel.
3. Is the cold water inlet control kit included?
Yes. The cylinder is supplied with a cold water inlet control kit for installation on site. It includes a pressure-reducing valve, pressure relief valve, isolating valve, line strainer, non-return valve and drain valve.
4. What is the heat-up time?
The listed heat-up time is 39 minutes at a flow rate of 15L/min with an 80°C primary flow, heating the water from 15°C to 60°C.
5. Does it need a separate external expansion vessel?
The supplied specifications describe an internal floating baffle expansion vessel built into the cylinder shell, so a separate external expansion vessel is not required for the cylinder arrangement described. Confirm the complete system design with the manufacturer and installer.
6. What is the product code?
The product code for the Megaflo Eco SystemReady 300SB is 95050502.
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