Heatrae Sadia Megaflo Eco Direct Unvented Cylinder Triple Immersion – 210DDD / 250DDD / 300DDD ECO DIR
Heatrae Sadia Megaflo Eco Direct Unvented Cylinder Triple Immersion – 210DDD / 250DDD / 300DDD ECO DIR
The Heatrae Sadia Megaflo Eco Direct DDD range provides the power and flexibility of three 3 kW titanium immersion heaters (9 kW total) in one unvented cylinder — designed for large domestic properties, high-demand applications, and installations where maximum electric hot water capacity is required. Available in 210, 250, and 300 litres, these are directly electrically heated cylinders with no boiler connection; they store water at mains pressure and deliver up to 76 litres per minute at 3 bar. Built from high-grade duplex stainless steel with a lifetime inner-tank guarantee and full safety kit supplied.
Megaflo Eco Direct DDD cylinders must be installed and commissioned by a G3 accredited competent person. All electrical connections — including the three separate immersion heater circuits at up to 9 kW total load — must be made by a qualified electrician to current IET Wiring Regulations. Each immersion requires a dedicated fused spur or circuit breaker.
DDD models are heated exclusively by their three 3 kW titanium immersion heaters. There is no boiler coil. These cylinders are ideal for all-electric homes, properties without gas, off-peak Economy 7/10 installations, and applications demanding high electric heating capacity. For boiler-fed cylinders, see the Megaflo Eco Indirect range.
The DD models (2 × 3 kW = 6 kW) are the standard choice for most domestic installations. The DDD models add a third 3 kW element, giving 9 kW total for significantly faster heat-up times — the 210DDD heats up in 68 minutes vs 102 for the 210DD — and greater flexibility with off-peak tariffs (e.g. running element combinations on different time bands). All three elements can also be wired to different circuits to enable zone-by-zone control.
Three independently controlled 3 kW titanium immersion heaters give 9 kW of installed electric heating capacity. Titanium elements are the highest grade available — engineered for longevity in aggressive, hard, or corrosive water conditions — significantly outlasting standard Incoloy or stainless steel alternatives.
At 9 kW vs 6 kW on the DD models, the DDD range heats up in 68 min (210DDD), 81 min (250DDD), and 97 min (300DDD) compared to 102, 121, and 146 minutes respectively for the DD equivalents. This 30–33% faster recovery is critical for high-demand households where the cylinder may be fully drawn down overnight.
The patented internal floating-baffle system accommodates DHW thermal expansion within the cylinder itself — no external expansion vessel required. This keeps the installation neat and compact, eliminating a common point of maintenance and potential failure in the plant room or airing cupboard.
Fabricated from high-grade duplex stainless steel, pressure-tested to 15 bar at the factory — five times the normal operating pressure. Heatrae Sadia back the inner vessel with a lifetime guarantee for domestic first-owner installations. All other components carry a 2-year warranty.
Three separately controllable elements allow flexible Economy 7 / Economy 10 or time-of-use tariff configurations: run the lower elements overnight on cheap-rate power to charge the cylinder fully, and use one upper element on a boost timer during the day. This multi-element architecture gives the installer and homeowner far greater tariff optimisation than a two-element unit.
All DDD models deliver up to 76 l/min at 3 bar. Every cylinder ships complete with: cold water inlet control kit (3 bar PRV, 8 bar PRV, ¼-turn isolator, strainer, non-return valve, drain cock) · factory-fitted 90 °C / 10 bar T&P valve · tundish · T&P insulation kit — nothing additional to source for the basic unvented installation.
| Parameter | Specification (all DDD models) |
|---|---|
| Inner vessel | High-grade duplex stainless steel — tested to 15 bar |
| Insulation | 60 mm CFC/HCFC-free fire-retardant PU foam (GWP = 3.1) |
| Immersion heaters | 3 × 3 kW titanium @ 240 V (2.8 kW @ 230 V) — 9 kW total |
| Operating pressure | 0.3 MPa (3 bar) |
| Max mains supply (to PRV) | 1.6 MPa (16 bar) |
| Pressure relief valve | 0.8 MPa (8 bar) |
| T&P valve | 90 °C / 1 MPa (10 bar) — factory-fitted |
| Connections | 22 mm compression / ¾" BSP |
| Max flow at 3 bar | 76 litres/min |
| Max flow at 1 bar | 45 litres/min |
| Diameter (all models) | 579 mm (Ø) |
| ErP class | Class C (all DDD models) |
| Kiwa certification | No. 1608707 |
| Guarantee | Lifetime inner tank · 2 years components |
| Country of manufacture | United Kingdom |
| Model | 210DDD | 250DDD | 300DDD |
|---|---|---|---|
| Product code | 95050480 | 95050471 | 95050474 |
| Nominal capacity (L) | 210 | 250 | 300 |
| Immersions (No. × kW) | 3 × 3 kW | 3 × 3 kW | 3 × 3 kW |
| Storage vol @ 3 bar (L) | 199 | 236 | 283 |
| V40 mixed at 40 °C (L) | 241 | 307 | 359 |
| ErP load profile | L | XL | XL |
| ErP water heating efficiency (%) | 37.5 | 37.8 | 37.7 |
| Heat-up time (all 9 kW, min) | 68 | 81 | 97 |
| Standing heat loss (kWh/24h) | 1.42 | 1.61 | 1.69 |
| Annual electricity (kWh) | 2,731 | 3,513 | 4,476 |
| Weight empty (kg) | 39 | 47 | 57 |
| Weight full (kg) | 237 | 282 | 339 |
| Dimension | 210DDD | 250DDD | 300DDD |
|---|---|---|---|
| A — DHW inlet | 414 | 414 | 414 |
| B — Cable entry lower | 275 | 275 | 275 |
| C — Cable entry upper | 801 | 1009 | 1313 |
| D — T&P relief valve | 1095 | 1323 | 1574 |
| E — Height | 1486 | 1738 | 2053 |
| F — Depth | 600 | 600 | 600 |
| G — Width / Ø | 579 | 579 | 579 |
Original: $2,459.10
-65%$2,459.10
$860.68More Images
Heatrae Sadia Megaflo Eco Direct Unvented Cylinder Triple Immersion – 210DDD / 250DDD / 300DDD ECO DIR
The Heatrae Sadia Megaflo Eco Direct DDD range provides the power and flexibility of three 3 kW titanium immersion heaters (9 kW total) in one unvented cylinder — designed for large domestic properties, high-demand applications, and installations where maximum electric hot water capacity is required. Available in 210, 250, and 300 litres, these are directly electrically heated cylinders with no boiler connection; they store water at mains pressure and deliver up to 76 litres per minute at 3 bar. Built from high-grade duplex stainless steel with a lifetime inner-tank guarantee and full safety kit supplied.
Megaflo Eco Direct DDD cylinders must be installed and commissioned by a G3 accredited competent person. All electrical connections — including the three separate immersion heater circuits at up to 9 kW total load — must be made by a qualified electrician to current IET Wiring Regulations. Each immersion requires a dedicated fused spur or circuit breaker.
DDD models are heated exclusively by their three 3 kW titanium immersion heaters. There is no boiler coil. These cylinders are ideal for all-electric homes, properties without gas, off-peak Economy 7/10 installations, and applications demanding high electric heating capacity. For boiler-fed cylinders, see the Megaflo Eco Indirect range.
The DD models (2 × 3 kW = 6 kW) are the standard choice for most domestic installations. The DDD models add a third 3 kW element, giving 9 kW total for significantly faster heat-up times — the 210DDD heats up in 68 minutes vs 102 for the 210DD — and greater flexibility with off-peak tariffs (e.g. running element combinations on different time bands). All three elements can also be wired to different circuits to enable zone-by-zone control.
Three independently controlled 3 kW titanium immersion heaters give 9 kW of installed electric heating capacity. Titanium elements are the highest grade available — engineered for longevity in aggressive, hard, or corrosive water conditions — significantly outlasting standard Incoloy or stainless steel alternatives.
At 9 kW vs 6 kW on the DD models, the DDD range heats up in 68 min (210DDD), 81 min (250DDD), and 97 min (300DDD) compared to 102, 121, and 146 minutes respectively for the DD equivalents. This 30–33% faster recovery is critical for high-demand households where the cylinder may be fully drawn down overnight.
The patented internal floating-baffle system accommodates DHW thermal expansion within the cylinder itself — no external expansion vessel required. This keeps the installation neat and compact, eliminating a common point of maintenance and potential failure in the plant room or airing cupboard.
Fabricated from high-grade duplex stainless steel, pressure-tested to 15 bar at the factory — five times the normal operating pressure. Heatrae Sadia back the inner vessel with a lifetime guarantee for domestic first-owner installations. All other components carry a 2-year warranty.
Three separately controllable elements allow flexible Economy 7 / Economy 10 or time-of-use tariff configurations: run the lower elements overnight on cheap-rate power to charge the cylinder fully, and use one upper element on a boost timer during the day. This multi-element architecture gives the installer and homeowner far greater tariff optimisation than a two-element unit.
All DDD models deliver up to 76 l/min at 3 bar. Every cylinder ships complete with: cold water inlet control kit (3 bar PRV, 8 bar PRV, ¼-turn isolator, strainer, non-return valve, drain cock) · factory-fitted 90 °C / 10 bar T&P valve · tundish · T&P insulation kit — nothing additional to source for the basic unvented installation.
| Parameter | Specification (all DDD models) |
|---|---|
| Inner vessel | High-grade duplex stainless steel — tested to 15 bar |
| Insulation | 60 mm CFC/HCFC-free fire-retardant PU foam (GWP = 3.1) |
| Immersion heaters | 3 × 3 kW titanium @ 240 V (2.8 kW @ 230 V) — 9 kW total |
| Operating pressure | 0.3 MPa (3 bar) |
| Max mains supply (to PRV) | 1.6 MPa (16 bar) |
| Pressure relief valve | 0.8 MPa (8 bar) |
| T&P valve | 90 °C / 1 MPa (10 bar) — factory-fitted |
| Connections | 22 mm compression / ¾" BSP |
| Max flow at 3 bar | 76 litres/min |
| Max flow at 1 bar | 45 litres/min |
| Diameter (all models) | 579 mm (Ø) |
| ErP class | Class C (all DDD models) |
| Kiwa certification | No. 1608707 |
| Guarantee | Lifetime inner tank · 2 years components |
| Country of manufacture | United Kingdom |
| Model | 210DDD | 250DDD | 300DDD |
|---|---|---|---|
| Product code | 95050480 | 95050471 | 95050474 |
| Nominal capacity (L) | 210 | 250 | 300 |
| Immersions (No. × kW) | 3 × 3 kW | 3 × 3 kW | 3 × 3 kW |
| Storage vol @ 3 bar (L) | 199 | 236 | 283 |
| V40 mixed at 40 °C (L) | 241 | 307 | 359 |
| ErP load profile | L | XL | XL |
| ErP water heating efficiency (%) | 37.5 | 37.8 | 37.7 |
| Heat-up time (all 9 kW, min) | 68 | 81 | 97 |
| Standing heat loss (kWh/24h) | 1.42 | 1.61 | 1.69 |
| Annual electricity (kWh) | 2,731 | 3,513 | 4,476 |
| Weight empty (kg) | 39 | 47 | 57 |
| Weight full (kg) | 237 | 282 | 339 |
| Dimension | 210DDD | 250DDD | 300DDD |
|---|---|---|---|
| A — DHW inlet | 414 | 414 | 414 |
| B — Cable entry lower | 275 | 275 | 275 |
| C — Cable entry upper | 801 | 1009 | 1313 |
| D — T&P relief valve | 1095 | 1323 | 1574 |
| E — Height | 1486 | 1738 | 2053 |
| F — Depth | 600 | 600 | 600 |
| G — Width / Ø | 579 | 579 | 579 |
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Heatrae Sadia Megaflo Eco Direct DDD range provides the power and flexibility of three 3 kW titanium immersion heaters (9 kW total) in one unvented cylinder — designed for large domestic properties, high-demand applications, and installations where maximum electric hot water capacity is required. Available in 210, 250, and 300 litres, these are directly electrically heated cylinders with no boiler connection; they store water at mains pressure and deliver up to 76 litres per minute at 3 bar. Built from high-grade duplex stainless steel with a lifetime inner-tank guarantee and full safety kit supplied.
Megaflo Eco Direct DDD cylinders must be installed and commissioned by a G3 accredited competent person. All electrical connections — including the three separate immersion heater circuits at up to 9 kW total load — must be made by a qualified electrician to current IET Wiring Regulations. Each immersion requires a dedicated fused spur or circuit breaker.
DDD models are heated exclusively by their three 3 kW titanium immersion heaters. There is no boiler coil. These cylinders are ideal for all-electric homes, properties without gas, off-peak Economy 7/10 installations, and applications demanding high electric heating capacity. For boiler-fed cylinders, see the Megaflo Eco Indirect range.
The DD models (2 × 3 kW = 6 kW) are the standard choice for most domestic installations. The DDD models add a third 3 kW element, giving 9 kW total for significantly faster heat-up times — the 210DDD heats up in 68 minutes vs 102 for the 210DD — and greater flexibility with off-peak tariffs (e.g. running element combinations on different time bands). All three elements can also be wired to different circuits to enable zone-by-zone control.
Three independently controlled 3 kW titanium immersion heaters give 9 kW of installed electric heating capacity. Titanium elements are the highest grade available — engineered for longevity in aggressive, hard, or corrosive water conditions — significantly outlasting standard Incoloy or stainless steel alternatives.
At 9 kW vs 6 kW on the DD models, the DDD range heats up in 68 min (210DDD), 81 min (250DDD), and 97 min (300DDD) compared to 102, 121, and 146 minutes respectively for the DD equivalents. This 30–33% faster recovery is critical for high-demand households where the cylinder may be fully drawn down overnight.
The patented internal floating-baffle system accommodates DHW thermal expansion within the cylinder itself — no external expansion vessel required. This keeps the installation neat and compact, eliminating a common point of maintenance and potential failure in the plant room or airing cupboard.
Fabricated from high-grade duplex stainless steel, pressure-tested to 15 bar at the factory — five times the normal operating pressure. Heatrae Sadia back the inner vessel with a lifetime guarantee for domestic first-owner installations. All other components carry a 2-year warranty.
Three separately controllable elements allow flexible Economy 7 / Economy 10 or time-of-use tariff configurations: run the lower elements overnight on cheap-rate power to charge the cylinder fully, and use one upper element on a boost timer during the day. This multi-element architecture gives the installer and homeowner far greater tariff optimisation than a two-element unit.
All DDD models deliver up to 76 l/min at 3 bar. Every cylinder ships complete with: cold water inlet control kit (3 bar PRV, 8 bar PRV, ¼-turn isolator, strainer, non-return valve, drain cock) · factory-fitted 90 °C / 10 bar T&P valve · tundish · T&P insulation kit — nothing additional to source for the basic unvented installation.
| Parameter | Specification (all DDD models) |
|---|---|
| Inner vessel | High-grade duplex stainless steel — tested to 15 bar |
| Insulation | 60 mm CFC/HCFC-free fire-retardant PU foam (GWP = 3.1) |
| Immersion heaters | 3 × 3 kW titanium @ 240 V (2.8 kW @ 230 V) — 9 kW total |
| Operating pressure | 0.3 MPa (3 bar) |
| Max mains supply (to PRV) | 1.6 MPa (16 bar) |
| Pressure relief valve | 0.8 MPa (8 bar) |
| T&P valve | 90 °C / 1 MPa (10 bar) — factory-fitted |
| Connections | 22 mm compression / ¾" BSP |
| Max flow at 3 bar | 76 litres/min |
| Max flow at 1 bar | 45 litres/min |
| Diameter (all models) | 579 mm (Ø) |
| ErP class | Class C (all DDD models) |
| Kiwa certification | No. 1608707 |
| Guarantee | Lifetime inner tank · 2 years components |
| Country of manufacture | United Kingdom |
| Model | 210DDD | 250DDD | 300DDD |
|---|---|---|---|
| Product code | 95050480 | 95050471 | 95050474 |
| Nominal capacity (L) | 210 | 250 | 300 |
| Immersions (No. × kW) | 3 × 3 kW | 3 × 3 kW | 3 × 3 kW |
| Storage vol @ 3 bar (L) | 199 | 236 | 283 |
| V40 mixed at 40 °C (L) | 241 | 307 | 359 |
| ErP load profile | L | XL | XL |
| ErP water heating efficiency (%) | 37.5 | 37.8 | 37.7 |
| Heat-up time (all 9 kW, min) | 68 | 81 | 97 |
| Standing heat loss (kWh/24h) | 1.42 | 1.61 | 1.69 |
| Annual electricity (kWh) | 2,731 | 3,513 | 4,476 |
| Weight empty (kg) | 39 | 47 | 57 |
| Weight full (kg) | 237 | 282 | 339 |
| Dimension | 210DDD | 250DDD | 300DDD |
|---|---|---|---|
| A — DHW inlet | 414 | 414 | 414 |
| B — Cable entry lower | 275 | 275 | 275 |
| C — Cable entry upper | 801 | 1009 | 1313 |
| D — T&P relief valve | 1095 | 1323 | 1574 |
| E — Height | 1486 | 1738 | 2053 |
| F — Depth | 600 | 600 | 600 |
| G — Width / Ø | 579 | 579 | 579 |
