The Megaflo Eco SystemFit 300SF is a 300-litre indirect unvented hot water cylinder designed for installation with a heat-only (regular) boiler. Building on the standard Megaflo Eco design, the SystemFit model features factory-fitted plumbing and wiring to help reduce installation time and provide a consistently neat finish. With a high-grade duplex stainless steel inner vessel, 60mm CFC/HCFC-free polyurethane foam insulation and an integrated internal floating baffle expansion vessel, it provides a practical hot water storage solution for larger domestic installations.
300 Litre Capacity
Indirect Unvented
SystemFit Factory Fitted
ERP Rating C
Nominal Capacity
300L
Hot water storage
Backup Immersion
3kW
1 × 3kW @ 240V
Standing Heat Loss
1.69
kWh/24h
Heat-Up Time
39 min
15°C to 60°C
Applications & suitability
Heat-Only Boiler Systems
Designed specifically for installation with a heat-only (regular) boiler as part of an indirect hot water system.
Large Hot Water Demand
The 300-litre nominal capacity provides substantial stored hot water for installations requiring larger storage capacity.
Neater Installations
Factory-fitted plumbing and wiring help reduce installation work and create a consistently neat appearance.
Unvented Hot Water Storage
An unvented cylinder configuration with an internal floating baffle expansion vessel integrated into the cylinder shell.
Key specifications
| Product |
Megaflo Eco SystemFit 300SF |
| Product Code |
95050455 |
| Product Type |
Indirect Unvented Hot Water Cylinder |
| Nominal Capacity |
300 litres |
| Height |
2053mm |
| Width |
630mm |
| Depth |
720mm |
| Weight Empty / Full |
69kg / 352kg |
| Standing Heat Loss |
1.69 kWh/24h |
| Max Flow at 3 Bar |
76 l/min |
| Max Flow at 1 Bar |
45 l/min |
| Heat-Up Time |
39 min (15 l/min, 80°C primary, 15°C–60°C) |
| Recovery – 70% Draw-Off |
27 min |
| Backup Immersion |
1 × 3kW @ 240V |
| Operating Pressure |
3 bar (0.3 MPa) |
| Max Mains Pressure |
16 bar (1.6 MPa) |
| Min Recommended Supply Pressure |
1.5 bar / 20 l/min |
| Inner Vessel |
High Grade Duplex Stainless Steel |
| Insulation |
60mm CFC/HCFC-Free Polyurethane Foam |
| ERP Rating |
C |
Installation & compatibility
Factory-fitted SystemFit installation: The Megaflo Eco SystemFit 300SF comes with factory-fitted plumbing and wiring, including three 22mm 2-port motorised valves, a Grundfos UPM3 Auto L 25-70 primary circulation pump, wiring centre, lock shield flow balancing valve and automatic differential bypass valve. The cylinder also incorporates a pre-wired 3kW immersion heater, temperature and pressure relief valve, pressure relief valve, drain valve and internal floating baffle expansion vessel.
Design & performance benefits
Factory-Fitted Plumbing & Wiring
Pre-fitted plumbing and electrical components help reduce installation time and provide a neat, consistent installation.
Integrated Expansion Vessel
The internal floating baffle expansion vessel is built into the cylinder shell, removing the requirement for a separate DHW expansion vessel.
Duplex Stainless Steel Vessel
The high-grade duplex stainless steel inner vessel provides the core storage structure for the unvented cylinder.
60mm Insulation
CFC/HCFC-free 60mm polyurethane foam insulation contributes to the cylinder's specified standing heat loss of 1.69 kWh/24h.
Additional installation features
Pre-Fitted Motorised Valves
Three 22mm 2-port motorised valves are factory fitted and wired for CH zone 1, CH zone 2 and DHW.
Integrated Pump & Controls
A Grundfos UPM3 Auto L 25-70 primary circulation pump and wiring centre are factory fitted to the cylinder.
Supplied Cold Water Inlet Kit
Includes a 3 bar pressure reducing valve with strainer and check valve, compliant with the stated BS EN and EN standards.
Ideal for
The Megaflo Eco SystemFit 300SF 300L Indirect Unvented Hot Water Cylinder is ideal for larger domestic hot water installations using a heat-only (regular) boiler. Its 300-litre capacity, factory-fitted plumbing and wiring, integrated pump, motorised valves and internal expansion vessel make it a practical choice where installation efficiency and a neat finished appearance are important. With a high-grade duplex stainless steel inner vessel, 60mm polyurethane foam insulation, 3kW backup immersion heater and specified 3 bar operating pressure, it provides a comprehensive indirect unvented hot water storage solution.
At GetPlumb, we strive to provide reliable and cost-effective delivery options to our customers. Please review our shipping policy below.
🆓 Free Local Delivery (Orders £100 & above)
We offer FREE delivery on orders £100 or more
for selected local areas.
Eligible Postcodes Include:
- RG*
- SL*
- OX10*, OX11*, OX49*
- HP1*, HP3*, HP8*, HP9*, HP10*, HP11*, HP12*, HP13*, HP14*
- WD*, HA*, UB*, TW*, KT*
- W1* – W9*
- NW*, SW*
Delivery Time: 2–4 working days
Shipping Cost: £0.00
📦 Standard Shipping (Weight-Based Rates)
For orders that do not qualify for free delivery, standard
shipping rates apply based on total cart weight.
- For cart weight between 0–2 kg, the shipping cost is £4.50 with a delivery time of 2–4 working days.
- For cart weight between 2–24 kg, the shipping cost is £9.99 with a delivery time of 2–4 working days.
- For cart weight between 24 kg and above, the shipping cost is £60 with a delivery time of 2–4 working days.
🧱 Block Salt (Harvey’s) – Unit-Based Shipping
This rate applies only to Harvey’s block salt products.
- £7.99 is charged for every 3 items.
- The charge increases by £7.99 for each additional set of 3 items.
Examples:
- 1–3 items → £7.99
- 4–6 items → £15.98
- 7–9 items → £23.97
Delivery Time: 2–4 working days
📏 Large / Long Items (Length-Based Shipping)
For oversized items where the product length is 1.5 metres or more:
Conditions:
- Product length ≥ 1.5 m
- Cart weight ≤ 40 kg
Shipping Cost: £18.00 (flat rate)
Delivery Time: 2–4 working days
Collection from Store
Customers can also choose to collect their order from our store in
Reading, UK, at no additional charge. For any questions regarding shipping, please contact our support team at online@getplumb.co.uk.
