Our range of accessories are designed to work with Baxi Air Source Heat Pumps heat pumps to help enhance the performance, efficiency and functionality of heating and hot water systems.
Our Solutions
Air Source Heat Pump Accessories
Baxi HP40 and HP60 Heat Pump £500 cashback promotion
You can earn £500 per installation for qualifying Baxi HP40 and Baxi HP60 Air Source Heat Pumps when they are installed, commissioned, and registered on Baxi Works with a valid MCS Installation Certificate by 30th April 2026.*
Our Solutions
Heating Controls
Baxi ASHP Control
Baxi ASHP Control set-up and configure our range of Baxi ASHPs with the Baxi ASHP Control. Designed for fast set-up, precision control and effective energy management.
Heat Pump Accessories
Baxi 24 ltr Buffer Tank
Purpose designed for use with our range of air source heat pumps, the A rated Baxi 24 Litre Buffer Vessel provides an efficient method for storing hot water that can be used to supply the system without activating the heat pump.
Easy to install the inclusion of the Baxi 24 Litre Buffer vessel can help improve the overall seasonal efficiency of a heat pump system.
Heating Controls
Baxi uSense 2 Smart Room Thermostat
The Baxi uSense smart room thermostat is compatible with most Baxi Combi boilers. It means you can control your heating using our Thermostat app on your smart phone or tablet.
ASHP solutions built around you, backed by us
Our comprehensive range of air source heat pump solutions fits the needs of every project – and with expert support always on hand, you can trust us to deliver. When it comes to ASHPs, we’ve got the lot
ASHP Accessories
HP40 & HP50 Accessories
'!' Please read the comment section for this product
ASHP Controller and Cylinder
| Product code | Product name | ASHP + controller + ASHP cylinder |
ASHP + Pre-plumbed and Pre-wired cylinder |
Comments |
|---|---|---|---|---|
| 7890025 | Baxi ASHP Control | ❗ | ✖ | A HMI is already provided with the HP40 and HP50, however you can choose to use this more advance controller. More details can be find in section controllers |
| 7837416 | Baxi ASHP Cylinder 210L | ✔ | ✖ | 2m2 coil Standard Installation Kit includes External Expansion Vessel, Cold Control Pack and Contactor Box - for more details please consult the product manual |
| 7837491 | Baxi ASHP Cylinder 250L | ✔ | ✖ | 3m2 coil Standard Installation Kit includes External Expansion Vessel, Cold Control Pack and Contactor Box - for more details please consult the product manual |
| 7837562 | Baxi ASHP Cylinder 300L | ✔ | ✖ | 3m2 coil Standard Installation Kit includes External Expansion Vessel, Cold Control Pack and Contactor Box - for more details please consult the product manual |
| 7853985 | Baxi ASHP Pre-plumbed Cylinder 170L | ✖ | ✔ | 2m2 coil. Standard Installation Kit includes : External Expansion Vessel, Primary Flow Connection Kit, Mains Water Connection Kit and PRV Connection Kit - for more details please consult the product manual |
| 7853986 | Baxi ASHP Pre-plumbed Cylinder 210L | ✖ | ✔ | 2m2 coil. Standard Installation Kit includes : External Expansion Vessel, Primary Flow Connection Kit, Mains Water Connection Kit and PRV Connection Kit - for more details please consult the product manual |
| 7853987 | Baxi ASHP Pre-plumbed Cylinder 250L | ✖ | ✔ | 3m2 coil. Standard Installation Kit includes : External Expansion Vessel, Primary Flow Connection Kit, Mains Water Connection Kit and PRV Connection Kit - for more details please consult the product manual |
| 7853988 | Baxi ASHP Pre-plumbed Cylinder 300L | ✖ | ✔ | 3m2 coil. Standard Installation Kit includes : External Expansion Vessel, Primary Flow Connection Kit, Mains Water Connection Kit and PRV Connection Kit - for more details please consult the product manual |
Outside Installation
| Product code | Product name | ASHP + controller + ASHP cylinder |
ASHP + Pre-plumbed and Pre-wired cylinder |
Comments |
|---|---|---|---|---|
| 7816801 | Rubber Support For ODU 600mm (3 Pack) | ✔ | ✔ | Dimension: 600Lx170W,100H mm each Perfect if you would like noise reduction, and to elevate your ASHP to protect your unit from accumulation of snow when unit placed on the floor |
| 100001369 | HOSES 1" HEAT PUMP | ✔ | ✔ | 870mm pre-insulated, flexible hoses. Will fit 4 to 6kWs |
| TBC | HOSES 1" 1/4 HEAT PUMP | ✔ | ✔ | 870mm pre-insulated, flexible hoses. Will fit 7kWs and larger outputs |
| 7902049 | 1" Antifrost Caleffi valve kit | ✔ | ✔ | Frost protection valve 1". Set consists of 2 pieces. Will fit 4 to 6kWs. If you do not use those, please make sure you use glycol in your system. |
| 7842647 | 1" 1/4 Antifrost Caleffi valve kit | ✔ | ✔ | Frost protection valve 1" 1/4. Set consists of 2 pieces. Will fit 7kWs and larger outputs. If you do not use those, please make sure you use glycol in your system. |
Hydronic Accessories
| Product code | Product name | ASHP + controller + ASHP cylinder |
ASHP + Pre-plumbed and Pre-wired cylinder |
Comments |
|---|---|---|---|---|
| 7879380 | 2nd Zone Accessory Kit | ✖ | ✔ | For the Baxi ASHP Pre-plumbed Cylinder Enables control of Central Heating across 2 zones, includes 1 x UPM3 Auto 25-70 Pump and 2 x 28mm Pump Union Valves |
| 7859015 | Temperature Probe Extension 20m | ✔ | ✖ | For 1st fix or as an extension of the temperature probe between a standard ASHP cylinder and the HP40 & HP50. |
| 100000030 | Sensor DHW and TAS AD212 | ❗ | ✖ | This is included with the Baxi ASHP Control - If need for first fix the DHW sensor, please order this item: 5m length Sensor + connector to our PCB. |
| 7902049 | 1" Antifrost Caleffi valve kit | ✔ | ✔ | Frost protection valve 1". Set consists of 2 pieces. Will fit 4 to 6kWs. If you do not use those, please make sure you use glycol in your system. |
| 7851676 | 24L Buffer Tank | ✔ | ✔ | This is to ensure proper compressor and defrost operations with an hydronic pressure break. System volume needs to be calculated. Typically used with 4 to 6kW. |
| 7768655 | 40L Buffer Tank | ✔ | ✔ | This is to ensure proper compressor and defrost operations with an hydronic pressure break. System volume needs to be calculated. Typically used with 8kWs and more ASHP. |
| 7746242 | Differential valve | ✔ | ✔ | G¾” male. Used when you are over pressurising your heating system, this will allow your water to circulate - this is to protect the ASHP by by-passing the heating circuit. |
| 100020167 | Hydraulic Module 1direct circuit | ✔ | ✔ | Distribute the heating system in 1 circuit |
| 100020168 | Hydraulic Module 1 direct circuit + Pump | ✔ | ✔ | Distribute the heating system in 1 circuit with a pump when needs better water circulation - can check the temperature flow and return |
| 7616233 | Hydraulic Module 1 direct + 1 mixed circuit | ✔ | ✔ | Hydraulic module consisting of a direct central heating circuit with pump and a mixed one central heating circuit with motorized mixer and pump. 2 pumps, with 3 way valves, and a collector for 2 circuits |
| 100020164 | Collector for 2 or 3 circuits | ✔ | ✔ | To distribute water to two to three circuits. You might want to use some wall brackets below. |
| 7854127 | Open distributor (6 connections). | ✔ | ✔ | To distribute water to six circuits |
| 100020165 | Wall brackets for collectors | ✔ | ✔ | Need to be ordered with 3661238575035 for complete set. |
| 100020166 | Wall brackets for collectors | ✔ | ✔ | Need to be ordered with 3661238575028 for complete set. |
Connectivity Accessories
| Product code | Product name | ASHP + controller + ASHP cylinder |
ASHP + Pre-plumbed and Pre-wired cylinder |
Comments |
|---|---|---|---|---|
| 7814703 | GTW-IOT - Gateway Wi-Fi | ✔ | ✔ | Plug in box to have access to the commissioning Wizard App: Baxi START, as well as having your ASHP remote connectivity ready. It also allow the end user to have access to their My Baxi App to remotely monitor their heating system. Works with the Baxi ASHP Control and the Baxi Pre-Plumbed Cylinder. |
| 7745928 | GTW-35 | ❗ | ✔ | Tool to access the commissioning Wizard App: Baxi START for ASHP with the ASHP Control as well as the Baxi Boilers. Can be re-used for all Baxi jobs. |
| 7842667 | Pulse-meter kit | ✔ | ✖ | This is for high accuracy energy monitoring when used with the Baxi ASHP Control |
| 7902049 | Kit solar | For solar thermal integration in DHW tank | ||
| 7684175 | SET VALVE REVERSAL EH812 | 3 way valves - inversion valves between DHW or heating |
Back up heaters
| Product code | Product name | ASHP + controller + ASHP cylinder |
ASHP + Pre-plumbed and Pre-wired cylinder |
Comments |
|---|---|---|---|---|
| 7708345 | SET BACKUP ELEC CONNECT EH904 | ✔ | ✖ | Must be used if you do not use an electrical back up system - Manage Immersion heater on the electrical back up water tank. Can also be used when offering 2 zones with valves only. |
| 7755564 | Electrical Back Up Heater 3kW | ✔ | ✖ | |
| 7755565 | Electrical Back-Up Heater 4.5k | ✔ | ✖ |
HP60 & Assure HP55 Accessories
'!' Please read the comment section for this product
ASHP Controller and Cylinder
| Product code | Product name | ASHP + controller + ASHP cylinder |
ASHP + Pre-plumbed and Pre-wired cylinder |
Hybrid system: ASHP + Boiler |
Comments |
|---|---|---|---|---|---|
| 7890025 | Baxi ASHP Control | ✔ | ✖ | ✔ | Required for use with HP60 and Assure HP55 if they are not being fitted with a Baxi ASHP Pre-plumbed Cylinder. More details can be find in section controllers |
| 7837416 | Baxi ASHP Cylinder 210L | ✔ | ✖ | ✖ | 2m2 coil Standard Installation Kit includes External Expansion Vessel, Cold Control Pack and Contactor Box - for more details please consult the product manual |
| 7837491 | Baxi ASHP Cylinder 250L | ✔ | ✖ | ✖ | 3m2 coil Standard Installation Kit includes External Expansion Vessel, Cold Control Pack and Contactor Box - for more details please consult the product manual |
| 7837562 | Baxi ASHP Cylinder 300L | ✔ | ✖ | ✖ | 3m2 coil Standard Installation Kit includes External Expansion Vessel, Cold Control Pack and Contactor Box - for more details please consult the product manual |
| 7853985 | Baxi ASHP Pre-plumbed Cylinder 170L | ✖ | ✔ | ✖ | 2m2 coil. Standard Installation Kit includes : External Expansion Vessel, Primary Flow Connection Kit, Mains Water Connection Kit and PRV Connection Kit - for more details please consult the product manual |
| 7853986 | Baxi ASHP Pre-plumbed Cylinder 210L | ✖ | ✔ | ✖ | 2m2 coil. Standard Installation Kit includes : External Expansion Vessel, Primary Flow Connection Kit, Mains Water Connection Kit and PRV Connection Kit - for more details please consult the product manual |
| 7853987 | Baxi ASHP Pre-plumbed Cylinder 250L | ✖ | ✔ | ✖ | 3m2 coil. Standard Installation Kit includes : External Expansion Vessel, Primary Flow Connection Kit, Mains Water Connection Kit and PRV Connection Kit - for more details please consult the product manual |
| 7853988 | Baxi ASHP Pre-plumbed Cylinder 300L | ✖ | ✔ | ✖ | 3m2 coil. Standard Installation Kit includes : External Expansion Vessel, Primary Flow Connection Kit, Mains Water Connection Kit and PRV Connection Kit - for more details please consult the product manual |
Outside Installation
| Product code | Product name | ASHP + controller + ASHP cylinder |
ASHP + Pre-plumbed and Pre-wired cylinder |
Hybrid system: ASHP + Boiler |
Comments |
|---|---|---|---|---|---|
| 7816801 | Rubber Support For ODU 600mm (3 Pack) | ✔ | ✔ | ✔ | Dimension: 600Lx170W,100H mm each Perfect if you would like noise reduction, and to elevate your ASHP to protect your unit from accumulation of snow when unit placed on the floor |
| 100001369 | HOSES 1" HEAT PUMP | ✔ | ✔ | ✔ | 870mm pre-insulated, flexible hoses. Will fit 4 to 6kWs |
| TBC | HOSES 1" 1/4 HEAT PUMP | ✔ | ✔ | ✔ | 870mm pre-insulated, flexible hoses. Will fit 7kWs and larger outputs |
| 7902049 | 1" Antifrost Caleffi valve kit | ✔ | ✔ | ✔ | Frost protection valve 1". Set consists of 2 pieces. Will fit 4 to 6kWs. If you do not use those, please make sure you use glycol in your system. |
| 7902050 | 1" 1/4 Antifrost Caleffi valve kit | ✔ | ✔ | ✔ | Frost protection valve 1" 1/4. Set consists of 2 pieces. Will fit 7kWs and larger outputs. If you do not use those, please make sure you use glycol in your system. |
Hydronic Accessories
| Product code | Product name | ASHP + controller + ASHP cylinder |
ASHP + Pre-plumbed and Pre-wired cylinder |
Hybrid system: ASHP + Boiler |
Comments |
|---|---|---|---|---|---|
| 7879380 | 2nd Zone Accessory Kit | ✖ | ✔ | ✖ | For the Baxi ASHP Pre-plumbed Cylinder Enables control of Central Heating across 2 zones, includes 1 x UPM3 Auto 25-70 Pump and 2 x 28mm Pump Union Valves |
| 7859015 | Temperature Probe Extension 20m | ✔ | ✖ | ❗ | For 1st fix or as an extension of the temperature probe between a standard ASHP cylinder and the HP40 & HP50. |
| 100000030 | Sensor DHW and TAS AD212 | ❗ | ✖ | ❗ | This is included with the Baxi ASHP Control - If need for first fix the DHW sensor, please order this item: 5m length Sensor + connector to our PCB. |
| 7851676 | 24L Buffer Tank | ✔ | ✔ | ❗ | This is to ensure proper compressor and defrost operations with an hydronic pressure break. System volume needs to be calculated. Typically used with 4 to 6kW. |
| 7768655 | 40L Buffer Tank | ✔ | ✔ | ❗ | This is to ensure proper compressor and defrost operations with an hydronic pressure break. System volume needs to be calculated. Typically used with 8kWs and more ASHP. |
| 7746242 | Differential valve | ✔ | ✔ | ✔ | G¾” male. Used when you are over pressurising your heating system, this will allow your water to circulate - this is to protect the ASHP by by-passing the heating circuit. |
| 100020167 | Hydraulic Module 1direct circuit | ✔ | ✔ | ✔ | Distribute the heating system in 1 circuit |
| 100020168 | Hydraulic Module 1 direct circuit + Pump | ✔ | ✔ | ✔ | Distribute the heating system in 1 circuit with a pump when needs better water circulation - can check the temperature flow and return |
| 7616233 | Hydraulic Module 1 direct + 1 mixed circuit | ✔ | ✔ | ✔ | Hydraulic module consisting of a direct central heating circuit with pump and a mixed one central heating circuit with motorized mixer and pump. 2 pumps, with 3 way valves, and a collector for 2 circuits |
| 100020164 | Collector for 2 or 3 circuits | ✔ | ✔ | ✔ | To distribute water to two to three circuits. You might want to use some wall brackets below. |
| 7854127 | Open distributor (6 connections). | ✔ | ✔ | ✔ | To distribute water to six circuits |
| 100020165 | Wall brackets for collectors | ✔ | ✔ | ✔ | Need to be ordered with 3661238575035 for complete set. |
| 100020166 | Wall brackets for collectors | ✔ | ✔ | ✔ | Need to be ordered with 3661238575028 for complete set. |
Connectivity Accessories
| Product code | Product name | ASHP + controller + ASHP cylinder |
ASHP + Pre-plumbed and Pre-wired cylinder |
Hybrid system: ASHP + Boiler |
Comments |
|---|---|---|---|---|---|
| 7814703 | GTW-IOT - Gateway Wi-Fi | ✔ | ✔ | ✔ | Plug in box to have access to the commissioning Wizard App: Baxi START, as well as having your ASHP remote connectivity ready. It also allow the end user to have access to their My Baxi App to remotely monitor their heating system. Works with the Baxi ASHP Control and the Baxi Pre-Plumbed Cylinder. |
| 7745928 | GTW-35 | ✔ | ✔ | ✔ | Tool to access the commissioning Wizard App: Baxi START for ASHP with the ASHP Control as well as the Baxi Boilers. Can be re-used for all Baxi jobs. |
| 7842667 | Pulse-meter kit | ✔ | ✖ | ✔ | This is for high accuracy energy monitoring when used with the Baxi ASHP Control |
| 7808411 | Kit solar | ✔ | ✖ | ❗ | For solar thermal integration in DHW tank |
| 7684175 | SET VALVE REVERSAL EH812 | ✔ | ✔ | ✔ | 3 way valves - inversion valves between DHW or heating |
| 100019114 | HYGRO SENSOR KIT FOR COOLING | ✔ | ✔ | ✔ | To prevent condensation in colling mode for underfloor - on/off |
| 7622433 | Set humidity sensor 0-10V HZ64 | ✔ | ✔ | ✔ | To prevent condensation in colling mode for underfloor - 0-10V |
Back up heaters
| Product code | Product name | ASHP + controller + ASHP cylinder |
ASHP + Pre-plumbed and Pre-wired cylinder |
Hybrid system: ASHP + Boiler |
Comments |
|---|---|---|---|---|---|
| 7708345 | SET BACKUP ELEC CONNECT EH904 | ✔ | ✖ | ✖ | Must be used if you do not use an electrical back up system - Manage Immersion heater on the electrical back up water tank. Can also be used when offering 2 zones with valves only. |
| 7755564 | Electrical Back Up Heater 3kW | ✔ | ✖ | ✖ | |
| 7755565 | Electrical Back-Up Heater 4.5k | ✔ | ✖ | ✖ |
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