MasterTherm BoxAir Inverter Split (7–22 kW)

Specifications and technical data

Air Source (ASHP)ResidentialR410A7–22 kW

Manufacturer	MasterTherm
Model	BoxAir Inverter Split
Model code	1BA45IS-11
Heat pump type	Air Source (ASHP)
Application	Residential
Refrigerant	R410A
Mode	Heating only
Heating capacity	7–22 kW
Max heating output (low temp)	22 kW at A7/W35
COP (heating)	4.7 at A7/W35
SCOP (heating)	4.46 at W35
Operating range (air)	-20 to 40 °C
Heating flow temperature	up to 60 °C
Electrical supply	380-415V (Three Phase)
Dimensions (H×W×D)	1495 × 820 × 526 mm
Operational Weight	170 kg
Sound power level	63 dB(A) (Sound Power LW(A))
Price (unit only)	~£11908.8 (checked 2026-07-18 00:00:00)
Data added	2026-06-28
Data source	Manufacturer Data Sheet; Price: UK Retailer Pricing (thermalearth.co.uk), ex VAT shown

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MasterTherm BoxAir Inverter Split is a 22 kW air source heat pump, providing heating and cooling, using R410A refrigerant.

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Data is compiled from manufacturer sources and may contain errors or gaps. Always confirm specifications with the manufacturer before making decisions.