Midea M-Thermon HT 4 kW Monobloc Air Source Heat Pump R290

4 kW monobloc heat pump with R290 refrigerant, supply up to 75 ºC and A+++/A++ efficiency, ideal for heating, cooling, and domestic hot water (DHW) even in very cold climates.

Midea M-Thermon HT 4 kW R290 Monobloc Air Source Heat Pump

The Midea M-Thermon HT 4 kW is a high-temperature monobloc air source heat pump designed to provide heating, cooling, and domestic hot water in a single outdoor unit. This solution stands out for using natural refrigerant R290, an environmentally friendly alternative, and for its ability to operate with supply temperatures up to 75 ºC, greatly expanding its installation possibilities, especially in renovations, replacement of traditional systems, and homes requiring high water temperatures.

Thanks to its monobloc design, the hydraulic installation is simplified compared to other systems, integrating key components such as the water pump, expansion vessel, and electric backup heater within the unit itself. This makes it a practical option for residential projects seeking a compact, efficient system ready to work with low or medium temperature emitters, as well as with certain existing installations that require higher supply temperatures.

Main Features

• Nominal heating output: 4.5 kW at A+7 ºC / W+35 ºC.
• COP: up to 5.15 at A+7 ºC / W+35 ºC.
• Natural refrigerant R290: GWP 3 and 0.7 kg refrigerant charge.
• Maximum heating supply: up to 75 ºC.
• DHW production: water temperature from 10 to 70 ºC.
• Operation in extreme conditions: heating and DHW with outdoor temperatures down to -25 ºC.
• Monobloc system: compact solution with integrated hydraulic components.
• Seasonal rating in average climate: A+++ at 35 ºC and A++ at 55 ºC.

Performance and Efficiency

The M-Thermon HT 4 kW is designed to provide a highly competitive balance between energy efficiency, operational stability, and high-temperature performance. In heating at A+7 ºC / W+35 ºC it delivers 4.5 kW with a COP of 5.15 and a consumption of 874 W, making it an especially attractive solution for underfloor heating, fan coils, or low-temperature radiators.

When higher water temperatures are required, the unit maintains reliable operation at A+7 ºC / W+55 ºC, with 4.6 kW and COP 3.2. Even in severe winter conditions, it offers stable performance: at A-7 ºC / W+35 ºC it provides 4.5 kW with COP 3.1, and at A-7 ºC / W+55 ºC it reaches 4.7 kW with COP 2.2.

It also delivers highly efficient cooling performance. At A+35 ºC / W+18 ºC it offers 4.5 kW with EER 5.5, while at A+35 ºC / W+7 ºC it reaches 4.7 kW with EER 3.65. This allows it to cover both gentle cooling needs and more demanding summer cooling requirements.

Seasonal Efficiency

One of the strengths of this Midea heat pump is its excellent seasonal performance in different climate conditions. In a moderate climate, the unit achieves:

• SCOP 5.2 at W+35 ºC, with ηs 204.8 % and A+++ rating.
• SCOP 3.82 at W+55 ºC, with ηs 149.7 % and A++ rating.

In a warm climate, its seasonal values are even higher:

• SCOP 5.97 at W+35 ºC.
• SCOP 4.34 at W+55 ºC.

In a cold climate, it maintains very competitive performance for its segment:

• SCOP 4.03 at W+35 ºC.
• SCOP 3.18 at W+55 ºC.

In cooling mode, seasonal efficiency is also outstanding:

• SEER 5.86 at W+7 ºC.
• SEER 8.14 at W+18 ºC.

High Temperature and Application Versatility

The M-Thermon HT series is designed for projects where a conventional low-temperature heat pump may not be sufficient. Its ability to operate with heating water between 12 and 75 ºC provides greater flexibility for renovations, boiler replacements, and adaptation to existing systems. Additionally, the DHW working range, from 10 to 70 ºC, enables high annual coverage for domestic hot water production.

According to the range information, this heat pump can reach up to 55 ºC DHW with outdoor temperatures of -25 ºC and up to 75 ºC supply for heating with outdoor temperatures of -10 ºC, reinforcing its suitability for cold climates and demanding applications.

Operation in Demanding Climates

The Midea M-Thermon HT 4 kW is prepared to operate across a wide range of outdoor temperatures:

• DHW: from -25 ºC to 46 ºC outdoor temperature.
• Heating: from -25 ºC to 35 ºC outdoor temperature.
• Cooling: from -5 ºC to 46 ºC outdoor temperature.

This operating range makes installation possible in areas with harsh winters and hot summers, offering a comprehensive solution year-round.

Integrated Hydraulic Equipment

As a monobloc unit, the system integrates components that simplify system design and can reduce installation time:

• Electric backup heater: 3,000 W.
• Water pump pressure: 9 mca.
• Expansion vessel: 8 liters.
• Minimum water volume: 40 liters.
• Nominal flow rate: 0.7 m³/h.
• Hydraulic connections: 1”.

This set of features makes it a highly suitable solution for compact residential installations, where ease of integration and technical space savings are especially valued.

Electrical and Acoustic Data

• Power supply: 220-240 V / 1 / 50 Hz.
• Maximum current: 12 A.
• Recommended circuit breaker: D20.
• Sound pressure: 48 dB(A).
• Sound power: 56 dB(A).

Its low noise level favors installation in residential environments, always with proper site planning and compliance with the manufacturer’s installation distances and requirements.

R290 Refrigerant: Efficiency and Lower Environmental Impact

The use of R290 is one of the main advantages of this range. It is a natural refrigerant with a GWP of 3, much lower than traditional refrigerants, helping to reduce the system’s environmental impact. In this 4 kW version, the charge is 0.7 kg, with a declared CO₂ equivalent of 0.00 t.

In addition to its environmental profile, R290 enables the unit to reach high supply temperatures, a particularly attractive advantage in energy renovation projects and boiler replacements.

Dimensions, Weight, and Reference

• Outdoor unit model: MHC-V4W/D2N7-E30.
• Reference: 14072218.
• Dimensions (width x height x depth): 1,295 x 718 x 429 mm.
• Net weight: 90 kg.

Recommended Applications

The Midea M-Thermon HT 4 kW is a suitable solution for homes or installations seeking a compact high-temperature heat pump capable of providing heating, cooling, and DHW. It is especially interesting for:

• Renovations where a boiler is to be replaced by a heat pump.
• Homes with low or medium temperature emitters.
• Installations requiring hot water at high temperatures.
• Cold climate areas where the unit must maintain performance at low outdoor temperatures.

Indicative Home Surface Area

As a general guideline, a 4 kW heat pump can be suitable for homes with an approximate thermal demand within the following ranges:

• 30–40 W/m²: between 100 and 130 m² in well-insulated buildings.
• 50–60 W/m²: between 65 and 80 m² in homes with average insulation.
• 80–100 W/m²: between 40 and 50 m² in poorly insulated buildings.

These values are indicative and should be confirmed with a thermal load calculation, as actual performance depends on climate, insulation level, ventilation, emitter type, and the DHW needs of the home.

Midea M-Thermon HT 4 kW Technical Specifications

• Heating capacity / COP A+7 ºC / W+35 ºC: 4.5 kW / 5.15.
• Consumption A+7 ºC / W+35 ºC: 874 W.
• Heating capacity / COP A+7 ºC / W+55 ºC: 4.6 kW / 3.2.
• Consumption A+7 ºC / W+55 ºC: 1,438 W.
• Heating capacity / COP A-7 ºC / W+35 ºC: 4.5 kW / 3.1.
• Consumption A-7 ºC / W+35 ºC: 1,452 W.
• Heating capacity / COP A-7 ºC / W+55 ºC: 4.7 kW / 2.2.
• Consumption A-7 ºC / W+55 ºC: 2,136 W.
• Cooling capacity / EER A+35 ºC / W+18 ºC: 4.5 kW / 5.5.
• Consumption A+35 ºC / W+18 ºC: 818 W.
• Cooling capacity / EER A+35 ºC / W+7 ºC: 4.7 kW / 3.65.
• Consumption A+35 ºC / W+7 ºC: 1,288 W.
• SCOP moderate climate W+35 ºC / W+55 ºC: 5.2 / 3.82.
• SCOP warm climate W+35 ºC / W+55 ºC: 5.97 / 4.34.
• SCOP cold climate W+35 ºC / W+55 ºC: 4.03 / 3.18.
• SEER W+7 ºC / W+18 ºC: 5.86 / 8.14.
• Heating energy rating in moderate climate: A+++ / A++.
• Refrigerant: R-290.
• GWP: 3.
• Refrigerant charge: 0.7 kg.
• DHW temperature: 10 to 70 ºC.
• Heating temperature: 12 to 75 ºC.
• Cooling temperature: 5 to 30 ºC.

Summary

The Midea M-Thermon HT 4 kW is a high-temperature monobloc air source heat pump designed for those seeking efficiency, sustainability, and versatility in a compact format. Its use of R290, ability to reach 75 ºC supply temperature, and performance in heating, cooling, and DHW make it a comprehensive option for both new builds and renovations, especially when a heat pump is needed to operate reliably even in demanding climate conditions.