Megaflo Eco SystemFit 125SF Indirect Unvented Hot Water Cylinder
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Description
The Megaflo Eco SystemFit 125SF 125 Litre Indirect Unvented Hot Water Cylinder (95050450) is a pre-plumbed and pre-wired hot water storage solution designed for use with compatible heat-only (regular) boilers. Unlike a standard indirect unvented cylinder, the Megaflo Eco SystemFit comes with factory-fitted plumbing, electrical wiring and key heating components to help simplify installation and provide a neat, professional finish.
Featuring a high-grade duplex stainless-steel inner vessel, 60mm of CFC/HCFC-free polyurethane foam insulation and an integrated floating-baffle expansion system, this 125-litre Megaflo cylinder is designed for reliable domestic hot water storage. Factory-fitted components include a 3kW immersion heater, primary circulation pump, motorised valves, safety controls and a wiring centre. The supplied cold water inlet control kit further supports installation, making the Megaflo Eco SystemFit 125SF a practical option for new heating installations and replacement projects.
At a Glance
Applications & Compatibility
The Megaflo Eco SystemFit 125SF is designed for domestic hot water installations using a compatible heat-only boiler. Its factory-fitted plumbing and wiring make it particularly suitable for projects where installation efficiency, organised pipework and integrated heating controls are important.
- Heat-only boiler systems: Designed for use with compatible regular boilers to heat and store domestic hot water.
- Central heating installations: Three factory-fitted two-port motorised valves support the specified central heating zones and domestic hot water circuit.
- Domestic hot water storage: The 125-litre nominal capacity is suitable for appropriately sized household hot water systems.
- Replacement cylinder projects: Provides an integrated option for suitable upgrades where the existing heating system and available space meet the product requirements.
- New-build properties: Factory-fitted plumbing and wiring can simplify installation planning for compatible heating system designs.
- Professional plumbing and heating projects: Suitable for installers seeking a pre-plumbed and pre-wired indirect unvented cylinder.
Confirm boiler compatibility, heating zone requirements, electrical connections, installation dimensions and the current manufacturer's instructions before ordering. Unvented hot water cylinders must be installed and commissioned by a suitably qualified professional in accordance with applicable regulations.
Key Specifications
| Product Information | |
|---|---|
| Brand | Megaflo Eco |
| Product Name | Megaflo Eco SystemFit 125SF Indirect Unvented Cylinder |
| Product Code | 95050450 |
| Product Type | Pre-Plumbed Indirect Unvented Hot Water Cylinder |
| Nominal Capacity | 125 litres |
| Compatible Boiler Type | Heat-only (regular) boiler |
| Energy Efficiency Rating | ErP B |
| Dimensions & Weight | |
| Height | 1102 mm |
| Width | 630 mm |
| Depth | 720 mm |
| Empty Weight | 43 kg |
| Full Weight | 183 kg |
| Construction & Insulation | |
| Inner Vessel Material | High-grade duplex stainless steel |
| Insulation Thickness | 60 mm |
| Insulation Material | CFC/HCFC-free polyurethane foam |
| Expansion System | Internal floating-baffle expansion vessel system |
| Heating & Hot Water Performance | |
| Standing Heat Loss | 1.05 kWh/24 hours |
| Maximum Flow at 3 Bar | 76 litres/minute |
| Maximum Flow at 1 Bar | 45 litres/minute |
| Heat-Up Time | 23 minutes (15 l/min flow, 80°C primary, 15°C to 60°C) |
| Recovery Time at 70% Draw-Off | 15 minutes |
| Immersion Heater Rating | 1 × 3 kW at 240 V |
| Pressure & Safety | |
| Operating Pressure | 3 bar (0.3 MPa) |
| Maximum Mains Pressure | 16 bar (1.6 MPa) |
| Minimum Recommended Supply Pressure | 1.5 bar / 20 litres per minute |
| Temperature & Pressure Relief Valve | 90°C / 10 bar, as specified |
| Expansion Relief Valve | 8 bar, as specified |
| Cold Water Inlet Control Kit | 3 bar pressure-reducing valve with strainer and check valve |
Key Features & Benefits
1. Factory-Fitted Plumbing & Wiring
Pre-installed pipework, electrical connections and heating components help reduce on-site installation work and provide a more organised, professional finish.
2. Integrated Heating Controls
Three factory-fitted and wired 22mm two-port motorised valves are specified for central heating zone 1, central heating zone 2 and domestic hot water.
3. Internal Floating-Baffle Expansion
The internal expansion arrangement is designed to reduce the space needed for a separate domestic hot water expansion vessel, helping create a more integrated installation.
4. High-Grade Stainless-Steel Vessel
The duplex stainless-steel inner vessel is designed for durable domestic hot water storage and resistance to corrosion under the specified operating conditions.
5. 3kW Backup Immersion Heater
The factory-fitted immersion heater provides an additional electric heating option when required, subject to the correct electrical supply, controls and installation requirements.
6. 60mm Thermal Insulation
CFC/HCFC-free polyurethane foam insulation helps reduce standing heat loss. The listed heat loss of 1.05 kWh per 24 hours supports comparison when assessing hot water storage options.
Factory-Fitted Components
The Megaflo Eco SystemFit 125SF is supplied with an integrated set of plumbing, heating and safety components to simplify installation with a compatible heat-only boiler.
- 3kW immersion heater: One pre-wired immersion heater with thermal controls and a Superloy 825 alloy-sheathed element.
- Temperature and pressure relief valve: Specified at 90°C / 10 bar, with insulation kit and 15/22mm tundish.
- Pressure relief valve: An 8 bar valve incorporating a check valve.
- Drain valve: Factory-fitted for the specified draining arrangement.
- Wiring centre: Provides the designated electrical connection point for the system components.
- Three motorised valves: 22mm two-port valves for central heating zone 1, central heating zone 2 and domestic hot water.
- Primary circulation pump: Grundfos UPM3 Auto L 25-70.
- Lockshield flow balancing valve: Supports balancing of the specified primary circuit.
- Automatic differential bypass valve: Included as part of the factory-fitted plumbing arrangement.
- Internal floating-baffle expansion system: Integrated within the cylinder shell.
What's Included?
Supplied with the cylinder:
- Megaflo Eco SystemFit 125SF 125-litre indirect unvented cylinder (95050450).
- Factory-fitted plumbing and wiring components listed in the product specification.
- 3 bar cold water inlet control kit incorporating a pressure-reducing valve, strainer and check valve.
Confirm the exact package contents and any additional installation accessories against the current manufacturer documentation before ordering.
Who Is This Cylinder For?
The Megaflo Eco SystemFit 125SF is intended for homeowners, plumbers, heating engineers and installers looking for a pre-plumbed indirect unvented hot water cylinder for a compatible heat-only boiler system. Its factory-fitted components make it particularly relevant for replacement projects, new heating installations and properties requiring a coordinated central heating and domestic hot water arrangement.
Installation & Setup
- Check the available installation space against the cylinder's 1102mm height, 630mm width and 720mm depth.
- Allow for the full operating weight of approximately 183kg and ensure the supporting surface is suitable.
- Confirm compatibility with the heat-only boiler, two central heating zones and domestic hot water controls.
- Verify the mains water supply, pressure requirements, safety valves and discharge arrangements before installation.
- Ensure the electrical supply and factory-fitted wiring are connected and commissioned in accordance with the manufacturer's instructions.
- Arrange installation and commissioning by a suitably qualified unvented-cylinder professional.
Frequently Asked Questions
1. What is the Megaflo Eco SystemFit 125SF?
The Megaflo Eco SystemFit 125SF is a 125-litre nominal-capacity indirect unvented hot water cylinder designed for compatible heat-only boilers. It comes with factory-fitted plumbing and wiring to help simplify installation.
2. What is the difference between Megaflo Eco and Eco SystemFit?
The SystemFit model adds factory-fitted plumbing and wiring to the cylinder, including designated motorised valves and other heating components. This reduces the amount of component fitting required on site compared with a standard cylinder installation.
3. Which boiler is compatible with the Megaflo Eco SystemFit 125SF?
The cylinder is designed for use with a compatible heat-only or regular boiler. Confirm the specific boiler model, heating configuration and controls with the manufacturer before installation.
4. Does the Megaflo Eco SystemFit 125SF include an immersion heater?
Yes. The supplied specifications list one factory-fitted 3kW immersion heater with thermal controls. The specified electrical rating is 3kW at 240V.
5. What are the dimensions of the 125SF cylinder?
The listed dimensions are 1102mm high, 630mm wide and 720mm deep. Allow additional room for pipework, safety discharge arrangements and servicing access.
6. What is the standing heat loss?
The specified standing heat loss is 1.05 kWh over 24 hours. The cylinder also features 60mm of CFC/HCFC-free polyurethane foam insulation.
7. What hot water flow rate can it provide?
The supplied specifications list a maximum flow rate of 76 litres per minute at 3 bar and 45 litres per minute at 1 bar. Actual performance depends on the incoming mains supply, pipework and installation conditions.
8. Does the cylinder require a separate expansion vessel?
The SystemFit incorporates an internal floating-baffle expansion arrangement for domestic hot water. Follow the manufacturer's instructions to determine the complete expansion and safety requirements for the installation.
9. What is the ErP rating of the Megaflo Eco SystemFit 125SF?
The supplied specification lists an ErP energy rating of B. Check the current product energy label for the applicable declared performance information.
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