The cylinder features an enlarged surface heat exchanger designed to maximise coil output across the full load, with a 22-minute heat-up time from cold under the stated test conditions of 15 l/min primary flow and 80°C primary temperature. A 1 × 3kW Superloy 825 backup immersion heater provides additional heating support when required.
170L Capacity
Indirect Unvented
ERP Class B
30-Year Tank Warranty
Max Flow
76 L/min @ 3 bar
Applications & suitability
3–4 Bedroom Homes
A 170-litre cylinder size suited to typical 3–4 bedroom homes and higher domestic hot water demand.
System or Heat-Only Boilers
Designed to be heated via a system or heat-only boiler using the indirect heating coil.
High Flow Demand
Provides up to 76 litres per minute at 3 bar for strong mains-pressure hot water delivery.
Pump-Free Installation
The unvented cylinder system does not require a pump or cold water storage cistern.
Key specifications
| Product Type |
Indirect Unvented Hot Water Cylinder |
| Nominal Capacity |
170 litres |
| Height |
1384 mm |
| Width × Depth |
579 × 600 mm |
| Weight Empty |
39 kg |
| Weight Full |
233 kg |
| Standing Heat Loss |
1.20 kWh/24h (50 W) |
| Maximum Flow at 3 bar |
76 L/min |
| Coil Heat-Up |
22 min (15 L/min, 80°C primary) |
| Recovery – 70% Draw-Off |
16 min |
| Backup Immersion |
1 × 3kW @ 240V Superloy 825 |
| Operating Pressure |
3 bar (0.3 MPa) |
| Maximum Mains Pressure |
16 bar |
| Connections |
22mm Compression / ¾" BSP Male |
| ERP Energy Class |
B |
| Product Code |
7817127 |
Installation & compatibility
The Megaflo Eco Indirect 170L is designed for heating via a system or heat-only boiler. It is an unvented mains-pressure cylinder that does not require a pump or cold water storage cistern. Factory-fitted components include the T&P valve, 3 bar PRV, tundish, wiring centre and 2-port motorised valve.
Design & performance benefits
Rapid Heat-Up
The coil provides a stated 22-minute heat-up time from cold at 15 L/min primary flow and 80°C primary temperature.
Enlarged Surface Heat Exchanger
The enlarged surface heat exchanger is designed to maximise coil output across the full load.
Duplex Stainless Steel
The inner vessel is manufactured from duplex stainless steel for the Megaflo Eco range.
Internal Floating Baffle
The internal floating baffle eliminates the need for an external expansion vessel.
Additional installation features
60mm PU Insulation
Features 60mm CFC-free polyurethane foam insulation with a stated standing heat loss of 1.20 kWh/24h.
Backup Immersion Heater
Includes one 3kW Superloy 825 immersion heater rated at 240V for additional heating support.
Kiwa Approved
The cylinder is specified as Kiwa approved and made in the UK.
Ideal for
The Megaflo Eco Indirect 170L Unvented Hot Water Cylinder is ideal for 3–4 bedroom homes requiring high-performance mains-pressure hot water storage. With its 170-litre capacity, 76 L/min flow rate, rapid 22-minute heat-up time, internal floating baffle and 60mm insulation, it provides a practical solution for installations using system or heat-only boilers. The cylinder also benefits from an ERP B energy rating, Kiwa approval, 30-year tank warranty and 2-year product guarantee.
