Hotjet ZETXp Heat Pump

Type: Air-to-water
Installation: Outdoor (External)
Refrigerant: R290 propane (GWP 3)
Heat loss: Up to 15 kW
Power variants: 7, 10 kW
Output temperature: Up to 75 °C
Regulation: Inverter (variable speed)
Control: SIEMENS (3 heating/cooling circuits)
Cascade: Yes
Defrosting: Reverse cycle

HOTJET ZETXp – Next-Generation Propane Monoblock

The flagship of the HOTJET range. ZETXp uses natural R290 (propane) refrigerant with a GWP of just 3. Output temperature up to 75 °C handles even old radiator systems without compromise.

The new Copeland YHV scroll inverter compressor pushes efficiency to a level where HOTJET ranks among the most efficient brands on the market. Energy class A+++ in both categories (W35 and W55).

Why ZETXp

R290 propane (GWP 3) – the future of refrigerants, ready for post-2027 EU regulations
Output up to 75 °C – ideal for older houses with radiators, no need to replace them
SCOP W35: 4.87 – 192% efficiency, among the highest values on the market
Copeland YHV – new generation scroll inverter compressor
All features included – PV support, hybrid operation, pool heating, cooling, webserver
46–48 dB – quiet operation certified to the strictest standards
Custom colour finish – powder-coated in any shade

Power Variants

Model	Building heat loss	Real heating output
ZETXp-7	4–10 kW	up to 10 kW
ZETXp-10	5–15 kW	up to 15 kW

Included in Delivery

Heat pump with heating and cooling function
Siemens control system (3 circuits)
Electric boiler 7.5 kW
Circulation pump
Webserver + app for iOS/Android
PV support, hybrid operation and pool heating

Smart Management

Every unit has a built-in webserver with a lifetime Siemens Cloud licence. Access is available to the homeowner (mobile app), the installer and the manufacturer. Remote diagnostics, parameter configuration and predictive maintenance — 90% of service requests are resolved remotely.

R290 and Legislation

R290 propane is not an F-gas — there are no obligations related to refrigeration technician certification. A standard heating installer can perform the installation. After 2027, F-gas regulations in the EU will tighten, making the investment in R290 an investment in the future.

ZETXp vs. ZETXe

ZETXp uses R290 propane and the Copeland YHV compressor with higher efficiency and an output temperature of 75 °C. ZETXe uses the Copeland XHV compressor. Both lines share an identical platform.

Type	Air-to-water
Installation	Outdoor (External)
Refrigerant	R290 propane (GWP 3)
Heat loss	Up to 15 kW
Power variants	7, 10 kW
Output temperature	Up to 75 °C
Regulation	Inverter (variable speed)
Control	SIEMENS (3 heating/cooling circuits)
Cascade	Yes
Defrosting	Reverse cycle

ZETXp	7 ZETXp	10 ZETXp
Compressor	Copeland YHV Scroll Variable Speed
Refrigerant	R290 propane (GWP 3)
Models	7 ZETXp / 10 ZETXp
Suitable for heat losses	4–10 kW	5–15 kW
Real heating output	up to 10 kW	up to 15 kW
Output temperature	Up to 75 °C
SCOP W35 (underfloor heating)	4.87 (192%)
SCOP W55 (radiators)	4.14 (163%)
Sound power LWA A2/W55	46 dB	48 dB
Energy class (with regulator)	A+++/A+++
Power supply	230V / 1~ / 50 Hz	400V / 3~ / 50 Hz
Dimensions (w × d × h)	1100 × 600 × 1040 mm
Weight	130 kg	140 kg