Heatrae Sadia Megaflo Eco Slimline Direct 150L is a direct unvented hot water cylinder designed for homes where a standard-width cylinder may not fit. Its slimline body measures 491mm in diameter and stores 150 litres of hot water. The Megaflo Eco Slimline range features an internal floating baffle, which removes the need for a separate external expansion vessel.
The cylinder is specified with two 3kW titanium immersion elements and 50mm CFC-free polyurethane foam insulation. Its combination valve is listed as delivering up to 70 litres per minute at 3 bar. Check the installation dimensions, incoming mains supply and hot-water demand with a qualified installer before purchase.
150L Capacity
491mm Diameter
2 × 3kW Titanium Immersion Elements
ErP Rating: C
At a Glance
Cylinder Type
Direct Unvented
Electric immersion heating
Nominal Capacity
150 litres
For domestic hot water storage
Diameter
491mm
Slimline footprint
Product Code
7034084
Megaflo Eco Slimline Direct 150
What Is the Megaflo Eco Slimline Direct?
This floor-standing cylinder stores domestic hot water and heats it directly using electric immersion elements. The slimline design is intended for homes with limited cylinder space. As an unvented cylinder, it supplies hot water from a pressurised mains-fed system; it does not use a cold-water header tank.
Key Features
Slimline Design
A 491mm diameter helps the cylinder fit into spaces where a wider model may not be suitable.
Internal Expansion
The internal floating baffle provides expansion accommodation without a separate external expansion vessel.
Titanium Immersion Elements
Supplied with two 3kW titanium immersion elements, as specified for this model.
Hot-Water Performance
The Megaflo combination valve is listed as delivering up to 70 litres per minute at 3 bar. Actual flow depends on the incoming mains supply and installation.
Insulated Cylinder
Specified with 50mm CFC-free polyurethane foam insulation to help limit standing heat loss.
Factory-Fitted Safety Components
The supplied product details list a temperature and pressure relief valve, 3 bar pressure-reducing valve, tundish and unvented installation kit. Confirm the package contents with the supplier.
Important Installation Guidance:
Unvented hot-water cylinders must be installed and commissioned by a suitably qualified and competent person in accordance with current manufacturer instructions and applicable regulations. The installer should confirm the incoming mains supply, discharge arrangements, electrical requirements and available service clearances.
Key Specifications
| Brand |
Heatrae Sadia |
| Range |
Megaflo Eco Slimline |
| Model |
Direct 150L |
| Product Code |
7034084 |
| Cylinder Type |
Direct unvented hot-water cylinder |
| Nominal Capacity |
150 litres |
| Height |
1622mm, as supplied |
| Diameter |
491mm |
| Weight, Empty / Full |
37kg / 186kg, as supplied |
| Standing Heat Loss |
1.46kWh/24h, as supplied |
| Maximum Flow at 3 Bar |
Up to 70 litres per minute, subject to system conditions
|
| Immersion Elements |
2 × 3kW titanium elements at 240V, as supplied |
| Operating Pressure |
3 bar, as supplied |
| Maximum Mains Pressure |
16 bar, as supplied |
| ErP Rating |
C, as supplied |
| Approvals |
Kiwa approved, as supplied |
| Country of Manufacture |
Made in the UK, as supplied |
Who Is This Cylinder For?
The Megaflo Eco Slimline Direct 150L is intended for homes that need a direct unvented hot-water cylinder but have limited width for installation. Check the cylinder’s full dimensions, capacity, electrical supply and hot-water requirements with an installer to confirm it suits the property.
Frequently Asked Questions
Is this a direct or indirect cylinder?
It is a direct cylinder, with water heated by its immersion elements rather than an indirect heating coil.
How much space does it need?
The supplied dimensions are 1622mm high and 491mm in diameter. Allow additional clearance for connections, installation and maintenance.
Does it need an external expansion vessel?
The Slimline design uses an internal floating baffle for expansion, so a separate external expansion vessel is not required for that function.
Who should install an unvented cylinder?
A suitably qualified and competent person should install and commission it, following the manufacturer instructions and applicable regulations.
Slimline Hot-Water Storage
The Heatrae Sadia Megaflo Eco Slimline Direct 150L (7034084) combines 150-litre storage with a 491mm diameter, titanium immersion elements and internal expansion. Confirm dimensions, installation requirements and system compatibility with a qualified installer before ordering.
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.
