Heat Pumps

Baxi Assure HP55 High Temperature Monobloc Air Source Heat Pump

The Baxi Assure HP55 Air Source Heat Pump delivers consistent, quiet performance using a low GWP refrigerant, meeting the demands of today’s projects whilst supporting environmental standards now and for the future.

Developed to align with low-carbon housing requirements, the Baxi Assure HP55 Air Source Heat Pump offers a reliable heating and hot water solution for a wide range of residential applications. Extremely quiet with excellent SCOP ratings it delivers outstanding energy performance at both high and medium temperature. Its efficient operation helps support compliance with evolving building standards, making it a practical choice for future-ready developments. For a complete system and maximum efficiency, pair it with our Baxi ASHP Pre-plumbed Cylinder or Baxi ASHP Cylinder and smart controls.

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Features and Benefits
Product Literature
Dimensions
Technical Specification

Features and Benefits

Multiple outputs

Available in outputs 4kW – 13kW all single phase with optional triple phase for large outputs

High Temperature

Up to 75°C flow temperature at A-10°C

Quiet operation

Sound power from 48 dB(A)

Cheaper operating costs

SCOP of up to 5.34

Low carbon footprint

Low carbon emissions of GWP 3

ASHP cylinder compatible

Pair with our ASHP cylinders for maximum system performance

Warranty

Up to 7 years’ enhanced warranty*

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*Terms and conditions apply

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Product Literature

Installation & Service Manuals

User Guides

Technical Specifications

Energy Labels

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Baxi ASHP Solutions guide

Built for comfort, efficiency and reliability, they make a difference across every project – from single installations to large-scale developments.

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ASHP Site Survey and External Planning Guide

Practical steps to help you assess and prepare for a smooth air source heat pump installation.

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Dimensions

4-6kW models

A: Heat Pump Height = 725mm

B: Heat Pump Depth = 426mm

C: Heat Pump Width = 1301mm

D: Unit Volume = 0.36 m³

Dimensions

8-11-13kW models

A: Heat Pump Height = 872mm

B: Heat Pump Depth = 523mm

C: Heat Pump Width = 1390mm

D: Unit Volume = 0.59 m³

Technical Specification

Product Model	4 kW	6 kW	8 kW	11kW	11 kWφ	13 kW	13 kWφ
Product Code	7899701	7899702	7899703	7899704	7899705	7899706	7899707
Product Information
Min/Max Operating Range (℃)	-25/+35	-25/+35	-25/+35	-25/+35	-25/+35	-25/+35	-25/+35

SCOP 35°C	5.34	5.22	5.20	4.77	4.77	4.70	4.70
35°C Maximum Output (1)
A-5°C W+35°C	5.91 kW	6.63 kW	9.72 kW	11.82 kW	11.82 kW	14.83 kW	14.83 kW
A0°C W+35°C	6.28 kW	7.22 kW	10.33 kW	13.14 kW	13.14 kW	16.13 kW	16.13 kW
A+7°C W+35°C	6.86 kW	7.70 kW	11.05 kW	14.72 kW	14.72 kW	17.57 kW	17.57 kW
35°C Nominal Output (2)
A-5°C W+35°C	4.12 kW	5.98 kW	8.10 kW	10.37 kW	10.37 kW	11.94 kW	11.94 kW
A0°C W+35°C	4.29 kW	5.91 kW	8.15 kW	10.97 kW	10.97 kW	12.54 kW	12.54 kW
A+7°C W+35°C	4.40 kW	6.26 kW	8.50 kW	11.50 kW	11.50 kW	13.50 kW	13.50 kW

SCOP 45°C	4.40	4.35	4.34	4.09	4.09	4.06	4.06
45°C Maximum Output (1)
A-5°C W+45°C	5.65 kW	6.33 kW	9.49 kW	11.32 kW	11.32 kW	14.22 kW	14.22 kW
A0°C W+45°C	5.99 kW	6.88 kW	10.02 kW	12.58 kW	12.58 kW	15.49 kW	15.49 kW
A+7°C W+45°C	6.55 kW	7.35 kW	10.47 kW	14.06 kW	14.06 kW	16.85 kW	16.85 kW
45°C Nominal Output (2)
A-5°C W+45°C	3.97 kW	5.71 kW	8.0 kW	10.40 kW	10.40 kW	12.89 kW	12.89 kW
A0°C W+45°C	4.35 kW	6.03 kW	8.07 kW	11.00 kW	11.00 kW	12.91 kW	12.91 kW
A+7°C W+45°C	4.40 kW	6.30 kW	8.23 kW	11.50 kW	11.50 kW	13.50 kW	13.50 kW

SCOP 55°C	3.99	3.90	3.89	3.75	3.75	3.73	3.73
55°C Maximum Output (1)
A-5°C W+55°C	5.15 kW	5.79 kW	8.40 kW	11.02 kW	11.02 kW	12.95 kW	12.95 kW
A0°C W+55°C	5.68 kW	6.57 kW	9.16 kW	12.14 kW	12.14 kW	14.64 kW	14.64 kW
A+7°C W+55°C	6.20 kW	6.97 kW	10.17 kW	13.61 kW	13.61 kW	16.40 kW	16.40 kW
55°C Nominal Output (2)
A-5°C W+55°C	4.28 kW	5.44 kW	7.29 kW	10.30 kW	10.30 kW	11.50 kW	11.50 kW
A0°C W+55°C	4.40 kW	5.50 kW	7.52 kW	10.80 kW	10.80 kW	12.78 kW	12.78 kW
A+7°C W+55°C	4.40 kW	6.10 kW	8.00 kW	11.50 kW	11.50 kW	13.50 kW	13.50 kW

Sound Pressure Level @1m	40.0 dB(A)	40.0 dB(A)	41 dB(A)	44.0 d(B)A	44.0 d(B)A	44.0 d(B)A	44.0 dB(A)
Sound Power Level (ERP)	48.0 dB(A)	48.0 dB(A)	49 d(B)A	52.0 d(B)A	52.0 d(B)A	52.0 d(B)A	52.0 dB(A)

ERP @ 35℃	A+++	A+++	A+++	A+++	A+++	A+++	A+++
ERP @ 55℃	A+++	A+++	A+++	A++	A++	A++	A++
Power Supply (V/Ph/Hz)	220V-240V/1Ph/50Hz	220V-240V/1Ph/50Hz	220V-240V/1Ph/50Hz	220V-240V/1Ph/50Hz	380V-415V/3Ph/50Hz	220V-240V/1Ph/50Hz	380V-415V/3Ph/50Hz
MCA (A)	12 A	13.50 A	17.5 A	25 A	8.5 A	28 A	9.5 A
TOCA (A)	15 A	15 A	19 A	31 A	11 A	31 A	11 A
MFA (A)	16 A	16 A	20 A	32 A	16 A	32 A	16 A
Flow/Return Connections	G 1	G 1	G 1 1/4	G 1 1/4	G 1 1/4	G 1 1/4	G 1 1/4
Internal Expansion Vessel	8 L	8 L	8 L	8 L	8 L	8 L	8 L
Pre-Pressure	1.5 Bar	1.5 Bar	1.5 Bar	1.5 Bar	1.5 Bar	1.5 Bar	1.5 Bar
Maximum Water Pressure	3 Bar	3 Bar	3 Bar	3 Bar	3 Bar	3 Bar	3 Bar
Minimum System Volume at 55°C	26 L	26 L	42 L	49 L	49 L	51 L	51 L
Refrigerant	R290	R290	R290	R290	R290	R290	R290
Refrigerant Volume	0.7 kg	0.7 kg	1.1 kg	1.25 kg	1.25	1.25 kg	1.25 kg
Compressor Type	Twin rotary / GMCC	Twin rotary / GMCC	Twin rotary / GMCC	Twin rotary / GMCC	Twin rotary / GMCC	Twin rotary / GMCC	Twin rotary / GMCC
Volumetrics
Weight Net	94 kg	94 kg	122 kg	140 kg	142 kg	140 kg	142 kg
Weight with Packaging	114 kg	114 kg	144 kg	162 kg	164 kg	162 kg	164 kg

(1) Output values tested at maximum compressor frequency

(2) Nominal values under test conditions EN14825:2013

Selections and sizing offered by Baxi utilise nominal values unless otherwise stated

Find out more about the Baxi HP60 and Baxi Assure HP55 accessories

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.

Find out more

Baxi Assure HP55 High Temperature Monobloc Air Source Heat Pump

The Baxi Assure HP55 Air Source Heat Pump delivers consistent, quiet performance using a low GWP refrigerant, meeting the demands of today’s projects whilst supporting environmental standards now and for the future.

Features and Benefits

Multiple outputs

High Temperature

Quiet operation

Cheaper operating costs

Low carbon footprint

ASHP cylinder compatible

Warranty

ASHP solutions built around you, backed by us

Product Literature

Installation & Service Manuals

Installation & Service Manuals

Product Documentation

User Guides

User Guides

Product Documentation

Technical Specifications

Technical Specifications

Product Documentation

Energy Labels

Energy Labels

Product Documentation

Warranty Guides

Warranty Guides

Product Documentation

Baxi ASHP Solutions guide

ASHP Site Survey and External Planning Guide

4-6kW models

8-11-13kW models

Technical Specification

Find out more about the Baxi HP60 and Baxi Assure HP55 accessories

Products

Services

Help & Advice

Important Information

Product Literature

Installation & Service Manuals

Installation & Service Manuals

Product Documentation

User Guides

User Guides

Product Documentation

Technical Specifications

Technical Specifications

Product Documentation

Energy Labels

Energy Labels

Product Documentation

Warranty Guides

Warranty Guides

Product Documentation

Baxi ASHP Solutions guide

ASHP Site Survey and External Planning Guide

4-6kW models

8-11-13kW models

Technical Specification

Find out more about the Baxi HP60 and Baxi Assure HP55 accessories

Products

Services

Help & Advice

Important Information