Residential · R32

Caldo UpR32 air-to-water heat pump for cold climates

Caldo Up is an air-to-water heat pump designed for harsh winters: EVI DC inverter technology, a Panasonic compressor and R32 refrigerant keep it heating down to −30 °C. Seven models from 8 to 35 kW serve underfloor heating and fan coils, cool in summer and produce domestic hot water (DHW) up to 60 °C.

Get a Quote Technical Data

Residential · light commercial

Caldorelli Caldo Up air-to-water heat pump

8–35 kWCapacity

R32Refrigerant

−30 °CMin. ambient temp.

60 °CMax. water temp.

Applications

Where it fits

Heating, cooling and hot water. EVI technology for reliable performance down to −30°C.

Homes and flats with underfloor heating
Fan coil systems for heating and cooling
Mountain areas with very cold winters
Small commercial premises and offices

Heating down to −30 °C

EVI DC inverter technology keeps the unit running at outdoor temperatures from −30 to 43 °C, with a COP of 4.23 to 4.92 under standard test conditions.

R32 refrigerant

R32 has a GWP of about one third of R410A. Every model uses a Panasonic compressor, and the 8 to 23 kW models have a Shimge DC circulation pump.

Three functions, one unit

Heating flow from 20 to 58 °C for underfloor heating and fan coils, chilled water from 7 to 25 °C for cooling, and DHW from 33 to 60 °C.

Precise Wi-Fi control

Temperature is set over Wi-Fi with 0.1 °C precision, and every model is rated IPX4, protected against splashing water and suitable for outdoor installation.

Made for your project

Technical data

Technical data are nominal values under standard test conditions. Actual performance may vary. Specifications may change without notice.

RefrigerantR32

Operating range−30~43°C

CompressorPanasonic

DHW outlet33–60°C

Heating outlet20–58°C

Cooling outlet7–25°C

Swipe to explore all specifications.

Model	8 kW	13 kW	16 kW	18 kW	23 kW	28 kW	35 kW
Power supply	230V/1Ph 50–60Hz	230V/1Ph 50–60Hz	230V/1Ph 50–60Hz	230V/1Ph 50–60Hz	380V/3Ph 50–60Hz	380V/3Ph 50–60Hz	380V/3Ph 50–60Hz
Circulation pump	Shimge DC	Shimge DC	Shimge DC	Shimge DC	Shimge DC	AWMT	AWMT
Heating capacity (kW)	1.57~8.40	4.40~13.00	5.8~15.5	5.9~18.2	7.5~23.0	10.2~28.0	12.8~35.0
Heating power input (kW)	0.32~1.87	0.90~3.02	1.22~3.66	1.20~4.11	1.61~5.38	2.17~6.56	2.71~8.19
COP	4.49~4.91	4.30~4.90	4.23~4.75	4.43~4.92	4.28~4.66	4.27~4.70	4.27~4.72
Cooling capacity (kW)	0.99~6.22	2.80~8.20	5.5~11.0	3.81~11.53	4.73~14.6	6.54~19.8	8.13~24.6
EER	2.85~3.41	2.48~3.29	2.76~3.29	2.85~3.43	2.76~3.22	2.76~3.24	2.75~3.23
DHW heating capacity (kW)	1.28~6.81	3.52~10.50	8.2~13.6	4.80~14.72	6.1~18.5	12.3~20.4	13.6~22.6
DHW COP	3.2~4.1	3.1~4.0	3.7~4.3	3.2~4.1	3.0~3.7	3.6~4.2	3.6~4.2
Water flow (m³/h)	1.4	2.2	2.7	3.1	3.9	4.8	6.0
Noise dB(A) @1 m	≤53	≤55	≤57	≤57	≤57	≤59	≤59
Net/gross weight (kg)	110/120	115/125	130/140	170/180	165/175	220/230	240/250
Pipe diameter	DN25	DN25	DN25	DN25	DN25	DN32	DN32
Unit dimensions (mm)	970×475×835	1100×475×985	1080×480×1060	1050×480×1330	1050×480×1380	1160×500×1580	1160×500×1580
IP rating	IPX4	IPX4	IPX4	IPX4	IPX4	IPX4	IPX4
Power cable size	3x4mm²	3x6mm²	3x10mm²	3x10mm²	5x4mm²	5x6mm²	5x6mm²
Circuit breaker (A)	25	32	40	40	25	32	32

Full 2026 catalogue (PDF)

How to choose the right model

The series comes in seven sizes: 8, 13, 16 and 18 kW on a 230 V single-phase supply, and 23, 28 and 35 kW on a 380 V three-phase supply. As a general guide, the 8 and 13 kW models suit smaller or well-insulated homes, 16 and 18 kW medium-sized houses, and 23 to 35 kW larger homes or small commercial spaces. Check the water flow too, from 1.4 m³/h on the 8 kW model to 6.0 m³/h on the 35 kW. Have a qualified installer confirm the final sizing.

See the full buying guide

Caldo Up

Frequently asked questions

Straight answers on how heat pumps work, efficiency, installation and choosing a Caldorelli series.

Talk to a specialist

Will the Caldo Up heat my home when it is −30 °C outside?

Yes. Its operating range runs from −30 to 43 °C outdoor temperature, thanks to EVI DC inverter technology, which maintains capacity and efficiency in severe cold. As with any air-to-water heat pump, available output and COP vary with the outdoor temperature, so the model should be sized for the local climate.

Can I use the Caldo Up with radiators?

Its heating flow temperature ranges from 20 to 58 °C, which makes the Caldo Up better suited to underfloor heating and fan coils, both of which run on low-temperature water. For radiators that need hotter water, the Caldo Boost series heats system water up to 70 °C. An installer should assess your existing emitters.

Does the Caldo Up also produce domestic hot water?

Yes. Connected to a storage cylinder, it supplies DHW at outlet temperatures from 33 to 60 °C. DHW capacity ranges from 1.28–6.81 kW on the 8 kW model to 13.6–22.6 kW on the 35 kW model. Solitank and Enamel TSE-VS HP tanks complete the system.

Why choose an R32 heat pump such as the Caldo Up?

R32 has a GWP of about one third of R410A, and in the Caldo Up it works with a Panasonic compressor and EVI DC inverter technology. Under test conditions the COP is 4.23 to 4.92 and the EER 2.48 to 3.43, with heating, cooling and DHW from a single unit.