Baxi Air Source Heat Pump Control - ASHP Accessories

Our Solutions

Air Source Heat Pump Accessories

Our range of accessories are designed to work with Baxi air source heat pumps to help enhance the performance, efficiency and functionality of heating and hot water systems.

Baxi HP40 and HP60 Air Source Heat Pump £500 cashback promotion - ASHP Installer offer

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 31st December 2026.*

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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.

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Buffer Tank

Baxi Buffer Tanks

Our range of Baxi Buffer Tanks are specifically designed for use with our range of Baxi air source heat pumps. They help optimise the efficiency and overall performance, where required, by providing additional system volume and creating a hydronic pressure break.

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Heating Controls

Baxi AmbiZen Thermostat

For customers who want full control at their fingertips, AmbiZen delivers. This sleek, smart thermostat connects via the My Baxi app, giving customers the freedom to adjust their heating and hot water anytime, from anywhere.

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Air Source Heat Pump Product Training Day - Become a heat pump installer with Baxi ASHP Product range

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

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ASHP Accessories

HP40 & HP50 Accessories

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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

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

Baxi Training

Discover our comprehensive range of courses and videos designed to enhance your skills and knowledge.

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Baxi Works

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Product code	Product name	ASHP + controller + ASHP cylinder	ASHP + Pre-plumbedand 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.
7870048	20L Buffer Tank	✔	✔*	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection.
7870049	30L Buffer Tank	✔	✔*	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection.
7901365	50L Buffer Tank	✔	✔*	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection.
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.

Product code	Product name	ASHP + controller + ASHP cylinder	ASHP + Pre-plumbedand 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.
7870048	20L Buffer Tank	✔	✔*	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection.
7870049	30L Buffer Tank	✔	✔*	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection.
7901365	50L Buffer Tank	✔	✔*	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection.
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.

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.
7870048	20L Buffer Tank	✔	✔*	✔	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection. They can also be useful for connecting multiple heat sources.
7870049	30L Buffer Tank	✔	✔*	✔	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection. They can also be useful for connecting multiple heat sources.
7901365	50L Buffer Tank	✔	✔*	✔	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection. They can also be useful for connecting multiple heat sources.
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.

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.
7870048	20L Buffer Tank	✔	✔*	✔	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection. They can also be useful for connecting multiple heat sources.
7870049	30L Buffer Tank	✔	✔*	✔	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection. They can also be useful for connecting multiple heat sources.
7901365	50L Buffer Tank	✔	✔*	✔	This is to ensure minimum system volume for proper compressor and defrost operations as well as providing a hydronic pressure break. System volume needs to be calculated. *2 port connection. They can also be useful for connecting multiple heat sources.
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.

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	✔	✖

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

Air Source Heat Pump Accessories

Baxi HP40 and HP60 Heat Pump £500 cashback promotion

Our Solutions

Baxi ASHP Control

Baxi Buffer Tanks

Baxi AmbiZen Thermostat

ASHP solutions built around you, backed by us

ASHP Accessories

HP40 & HP50 Accessories

ASHP Controller and Cylinder

Outside Installation

Hydronic Accessories

Connectivity Accessories

Back up heaters

Baxi Training

Baxi Works

Products

Services

Help & Advice

Important Information

ASHP solutions built around you, backed by us

ASHP Accessories

HP40 & HP50 Accessories

ASHP Controller and Cylinder

Outside Installation

Hydronic Accessories

Connectivity Accessories

Back up heaters

HP60 & Assure HP55 Accessories

ASHP Controller and Cylinder

Outside Installation

Hydronic Accessories

Connectivity Accessories

Back up heaters

Baxi Training

Baxi Works

Products

Services

Help & Advice

Important Information

HP60 & Assure HP55 Accessories

ASHP Controller and Cylinder

Outside Installation

Hydronic Accessories

Connectivity Accessories

Back up heaters