Baxi 600 Combi 2 Gas Combi Boiler - 624 / 630 / 636 (7796586 / 7796587 / 7796588)
The Baxi 600 Combi 2 is a wall-hung condensing gas combination boiler available in three outputs — 24 kW (624), 30 kW (630), and 36 kW (636) — delivering central heating and instant mains-pressure hot water in a single compact unit. No separate cylinder, no cold water tank, no loft header tank — just one wall-mounted boiler that fits neatly inside a standard kitchen or utility cupboard. An ErP A-rating, 93% seasonal efficiency, stainless steel heat exchanger, and seven-year parts and labour warranty make the 600 Combi 2 an ideal mid-range choice for homes with up to two bathrooms. Every model ships with an EasyFill permanent filling link included in the box.
As a combination boiler, the 600 Combi 2 provides both central heating and on-demand mains-pressure hot water without needing a separate hot water storage cylinder, cold water storage tank, or loft header tank. This frees up valuable airing cupboard and loft space.
The stainless steel heat exchanger offers superior corrosion and scale resistance compared to aluminium alternatives, extending the operational life of the boiler and supporting the 7-year warranty commitment.
All three models achieve 93% seasonal efficiency and hold an ErP A-rating, meeting EU Energy-related Products Directive standards and delivering meaningfully lower running costs compared to older G-rated boilers.
The pre-heated siphonic condensate trap discharges warmed condensate all at once rather than in slow trickles, significantly reducing the risk of frozen condensate pipes in cold weather and the associated loss of heating and hot water.
All models convert between natural gas (G20) and LPG (G31) via a simple gas valve adjustment by a Gas Safe engineer. No additional accessory kit purchase is required, making the 600 Combi 2 suitable for off-grid properties.
The EasyFill permanent filling link is included in the box, allowing homeowners to top up system pressure themselves quickly and cleanly without a temporary hose or engineer visit, reducing unnecessary callouts.
The 600 Combi 2 supports OpenTherm modulating communication, enabling compatible thermostats (Nest, Hive, and other OT devices) to modulate boiler output rather than simply cycling on and off. The optional Baxi uSense Wi-Fi thermostat adds smartphone scheduling.
At 700 mm H × 390 mm W × 285 mm D the 600 Combi 2 is designed to slot into a standard 290 mm-deep kitchen cupboard, keeping the boiler discreet and the kitchen uncluttered.
Certified for operation on natural gas blended with up to 20% hydrogen (H₂), ensuring the boiler is ready for planned UK gas grid decarbonisation changes without any hardware modifications.
| Specification | 624 Combi 2 | 630 Combi 2 | 636 Combi 2 |
|---|---|---|---|
| Baxi Part Number (MPN) | 7796586 | 7796587 | 7796588 |
| DHW Output (kW) | 24 kW | 30 kW | 36 kW |
| CH Max Output (condensing) | ~21 kW | ~21 kW | ~25 kW |
| Boiler Type | Wall-hung condensing gas combination boiler | ||
| Seasonal Efficiency | 93% | 93% | 93% |
| ErP Energy Rating | A | A | A |
| Heat Exchanger | Stainless steel | Stainless steel | Stainless steel |
| Gas Type | NG (G20) / LPG (G31) | NG (G20) / LPG (G31) | NG (G20) / LPG (G31) |
| Hydrogen Compatibility | Up to 20% H₂ | Up to 20% H₂ | Up to 20% H₂ |
| CH Flow Temp Range | 25–80 °C | 25–80 °C | 25–80 °C |
| Electrical Supply | 230 V / 50 Hz | 230 V / 50 Hz | 230 V / 50 Hz |
| Dimensions (H × W × D) | 700 × 390 × 285 mm | 700 × 390 × 285 mm | 700 × 390 × 285 mm |
| Min Cupboard Depth | 290 mm | 290 mm | 290 mm |
| Filling System | EasyFill permanent filling link (included) | EasyFill permanent filling link (included) | EasyFill permanent filling link (included) |
| Controls | OpenTherm; Baxi uSense (optional) | OpenTherm; Baxi uSense (optional) | OpenTherm; Baxi uSense (optional) |
| Warranty | 7 years P&L | 7 years P&L | 7 years P&L |
Original: $1,688.44
-65%$1,688.44
$590.95More Images
Baxi 600 Combi 2 Gas Combi Boiler - 624 / 630 / 636 (7796586 / 7796587 / 7796588)
The Baxi 600 Combi 2 is a wall-hung condensing gas combination boiler available in three outputs — 24 kW (624), 30 kW (630), and 36 kW (636) — delivering central heating and instant mains-pressure hot water in a single compact unit. No separate cylinder, no cold water tank, no loft header tank — just one wall-mounted boiler that fits neatly inside a standard kitchen or utility cupboard. An ErP A-rating, 93% seasonal efficiency, stainless steel heat exchanger, and seven-year parts and labour warranty make the 600 Combi 2 an ideal mid-range choice for homes with up to two bathrooms. Every model ships with an EasyFill permanent filling link included in the box.
As a combination boiler, the 600 Combi 2 provides both central heating and on-demand mains-pressure hot water without needing a separate hot water storage cylinder, cold water storage tank, or loft header tank. This frees up valuable airing cupboard and loft space.
The stainless steel heat exchanger offers superior corrosion and scale resistance compared to aluminium alternatives, extending the operational life of the boiler and supporting the 7-year warranty commitment.
All three models achieve 93% seasonal efficiency and hold an ErP A-rating, meeting EU Energy-related Products Directive standards and delivering meaningfully lower running costs compared to older G-rated boilers.
The pre-heated siphonic condensate trap discharges warmed condensate all at once rather than in slow trickles, significantly reducing the risk of frozen condensate pipes in cold weather and the associated loss of heating and hot water.
All models convert between natural gas (G20) and LPG (G31) via a simple gas valve adjustment by a Gas Safe engineer. No additional accessory kit purchase is required, making the 600 Combi 2 suitable for off-grid properties.
The EasyFill permanent filling link is included in the box, allowing homeowners to top up system pressure themselves quickly and cleanly without a temporary hose or engineer visit, reducing unnecessary callouts.
The 600 Combi 2 supports OpenTherm modulating communication, enabling compatible thermostats (Nest, Hive, and other OT devices) to modulate boiler output rather than simply cycling on and off. The optional Baxi uSense Wi-Fi thermostat adds smartphone scheduling.
At 700 mm H × 390 mm W × 285 mm D the 600 Combi 2 is designed to slot into a standard 290 mm-deep kitchen cupboard, keeping the boiler discreet and the kitchen uncluttered.
Certified for operation on natural gas blended with up to 20% hydrogen (H₂), ensuring the boiler is ready for planned UK gas grid decarbonisation changes without any hardware modifications.
| Specification | 624 Combi 2 | 630 Combi 2 | 636 Combi 2 |
|---|---|---|---|
| Baxi Part Number (MPN) | 7796586 | 7796587 | 7796588 |
| DHW Output (kW) | 24 kW | 30 kW | 36 kW |
| CH Max Output (condensing) | ~21 kW | ~21 kW | ~25 kW |
| Boiler Type | Wall-hung condensing gas combination boiler | ||
| Seasonal Efficiency | 93% | 93% | 93% |
| ErP Energy Rating | A | A | A |
| Heat Exchanger | Stainless steel | Stainless steel | Stainless steel |
| Gas Type | NG (G20) / LPG (G31) | NG (G20) / LPG (G31) | NG (G20) / LPG (G31) |
| Hydrogen Compatibility | Up to 20% H₂ | Up to 20% H₂ | Up to 20% H₂ |
| CH Flow Temp Range | 25–80 °C | 25–80 °C | 25–80 °C |
| Electrical Supply | 230 V / 50 Hz | 230 V / 50 Hz | 230 V / 50 Hz |
| Dimensions (H × W × D) | 700 × 390 × 285 mm | 700 × 390 × 285 mm | 700 × 390 × 285 mm |
| Min Cupboard Depth | 290 mm | 290 mm | 290 mm |
| Filling System | EasyFill permanent filling link (included) | EasyFill permanent filling link (included) | EasyFill permanent filling link (included) |
| Controls | OpenTherm; Baxi uSense (optional) | OpenTherm; Baxi uSense (optional) | OpenTherm; Baxi uSense (optional) |
| Warranty | 7 years P&L | 7 years P&L | 7 years P&L |
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Baxi 600 Combi 2 is a wall-hung condensing gas combination boiler available in three outputs — 24 kW (624), 30 kW (630), and 36 kW (636) — delivering central heating and instant mains-pressure hot water in a single compact unit. No separate cylinder, no cold water tank, no loft header tank — just one wall-mounted boiler that fits neatly inside a standard kitchen or utility cupboard. An ErP A-rating, 93% seasonal efficiency, stainless steel heat exchanger, and seven-year parts and labour warranty make the 600 Combi 2 an ideal mid-range choice for homes with up to two bathrooms. Every model ships with an EasyFill permanent filling link included in the box.
As a combination boiler, the 600 Combi 2 provides both central heating and on-demand mains-pressure hot water without needing a separate hot water storage cylinder, cold water storage tank, or loft header tank. This frees up valuable airing cupboard and loft space.
The stainless steel heat exchanger offers superior corrosion and scale resistance compared to aluminium alternatives, extending the operational life of the boiler and supporting the 7-year warranty commitment.
All three models achieve 93% seasonal efficiency and hold an ErP A-rating, meeting EU Energy-related Products Directive standards and delivering meaningfully lower running costs compared to older G-rated boilers.
The pre-heated siphonic condensate trap discharges warmed condensate all at once rather than in slow trickles, significantly reducing the risk of frozen condensate pipes in cold weather and the associated loss of heating and hot water.
All models convert between natural gas (G20) and LPG (G31) via a simple gas valve adjustment by a Gas Safe engineer. No additional accessory kit purchase is required, making the 600 Combi 2 suitable for off-grid properties.
The EasyFill permanent filling link is included in the box, allowing homeowners to top up system pressure themselves quickly and cleanly without a temporary hose or engineer visit, reducing unnecessary callouts.
The 600 Combi 2 supports OpenTherm modulating communication, enabling compatible thermostats (Nest, Hive, and other OT devices) to modulate boiler output rather than simply cycling on and off. The optional Baxi uSense Wi-Fi thermostat adds smartphone scheduling.
At 700 mm H × 390 mm W × 285 mm D the 600 Combi 2 is designed to slot into a standard 290 mm-deep kitchen cupboard, keeping the boiler discreet and the kitchen uncluttered.
Certified for operation on natural gas blended with up to 20% hydrogen (H₂), ensuring the boiler is ready for planned UK gas grid decarbonisation changes without any hardware modifications.
| Specification | 624 Combi 2 | 630 Combi 2 | 636 Combi 2 |
|---|---|---|---|
| Baxi Part Number (MPN) | 7796586 | 7796587 | 7796588 |
| DHW Output (kW) | 24 kW | 30 kW | 36 kW |
| CH Max Output (condensing) | ~21 kW | ~21 kW | ~25 kW |
| Boiler Type | Wall-hung condensing gas combination boiler | ||
| Seasonal Efficiency | 93% | 93% | 93% |
| ErP Energy Rating | A | A | A |
| Heat Exchanger | Stainless steel | Stainless steel | Stainless steel |
| Gas Type | NG (G20) / LPG (G31) | NG (G20) / LPG (G31) | NG (G20) / LPG (G31) |
| Hydrogen Compatibility | Up to 20% H₂ | Up to 20% H₂ | Up to 20% H₂ |
| CH Flow Temp Range | 25–80 °C | 25–80 °C | 25–80 °C |
| Electrical Supply | 230 V / 50 Hz | 230 V / 50 Hz | 230 V / 50 Hz |
| Dimensions (H × W × D) | 700 × 390 × 285 mm | 700 × 390 × 285 mm | 700 × 390 × 285 mm |
| Min Cupboard Depth | 290 mm | 290 mm | 290 mm |
| Filling System | EasyFill permanent filling link (included) | EasyFill permanent filling link (included) | EasyFill permanent filling link (included) |
| Controls | OpenTherm; Baxi uSense (optional) | OpenTherm; Baxi uSense (optional) | OpenTherm; Baxi uSense (optional) |
| Warranty | 7 years P&L | 7 years P&L | 7 years P&L |
