Useful Information


Why choose an air-to-air heat pump?

Choosing an air-to-air heat pump is worthwhile for a number of reasons:

  1. You receive three functions in a single system – heating of premises in winter, cooling in summer and air cleaning.
  2. Compared with other heating systems, the investment is not major and soon pays off.
  3. Air-to-air heat pumps can be installed in any housing – both in the housing you already live in and in the one which is under construction.
  4. An exhaust airflow moves the air in the premises drying it a little, thus the formation and/or spread of mildew is prevented.
  5. MSZ-FH-VEHZ heat pumps have a particularly advanced four-filter system which cleans the air from solid particles, viruses and various allergens as well as absorbs unpleasant odours. Other models have standard filters against solid particles and pollen.

Air-to-air heat pumps can be matched with all conventional heating systems, thus reducing heating costs, improving air in the premises and ensuring appropriate microclimate in the premises.

Air-to-air heat pumps for the home

Air-to-air heat pumps for commercial, industrial and warehousing premises

Why choose an air-to-water heat pump?

If you have or are constructing a new house and plan to have a water-based heating system (radiators, heated floor) and preparation of hot water, choose a pump of this type. You will receive a full-fledged system which can serve as a single source of heat all year round:

  • During the entire season, you will have at home a stable desirable temperature of premises the settings of which you will be able to manage at a press of a button.
  • You will no longer need to look for solid fuel or a place to store it, or otherwise prepare for an upcoming heating season.
  • Installation of an air-to-water heat pump is simple and speedy, and it can be integrated into any other heating system. Both outdoors and inside the premises, the units of an air-to-water heat pump occupy very little space.
  • You will no longer need a chimney and to perform the works of its installation, either. The MITSUBISHI ELECTRIC air-to-water system will enable you to forget the old boiler-room.
  • During the summer, an air-to-water heat pump prepares the water for domestic consumption at a particularly low cost.
  • There is a possibility to connect solar collectors to the air-to-water heating system.

Air-to-water heat pumps for the home

Air-to-water heat pumps for commercial, industrial and warehousing premises

How do you know what type and capacity of a heat pump you need?

Our specialists will provide you with all the necessary consultations and help you choose a suitable and most cost-effective model of a heat pump. You can also make approximate calculations yourselves as to the capacity of a pump you need by using a simple calculator on this page of our website.

What is the level of noise emitted by MITSUBISHI ELECTRIC heat pumps?

MITSUBISHI ELECTRIC heat pumps are among the most silent ones in the market. The level of noise of equipment depends on the model. MSZ-SF-VE and MFZ-KJ-VE indoor units operate most silently – from 19/20 dB (these are the most silent heat pumps in the market), while MSZ-FH-VE and MSZ-EF-VE equipment operates at the noise level from 21 dB. The level of noise emitted by outdoor units of heat pumps starts from 46 dB. All MITSUBISHI ELECTRIC heat pumps are in compliance with the noise level standards established by the Public Health Centre. For this reason, our equipment may be installed, without any hindrances, in all buildings and in premises of various purposes.

How much does a heat pump cost?

The price of a heat pump is determined by many factors: capacity, type, place of installation, and distance between the indoor and outdoor units. You may make an inquiry on the telephone or by e-mail, and you will receive a reference price quote. The exact price is established following an examination of facilities and assessment of all installation conditions. We use only the highest-quality materials for installation: quality copper pipes, channels, anti-vibration rubber mounts, brackets, etc.

What about a warranty and technical maintenance?

  • The majority of MITSUBISHI ELECTRIC heat pumps as well as the works of their installation are granted even a five-year warranty.
  • Recovery (ventilation) systems are granted a two-year warranty.
  • Dehumidifiers and other products are granted a two/three-year warranty.

Warranty and post-warranty servicing is performed by our qualified specialists.

What happened – after a year, an air-to-air heat pump started releasing less heat?

NESVAUS_FILTRAI Tests have identified that dusty, clogged filters reduce equipment efficiency even up to 30 per cent! Therefore, first of all it is necessary to properly clean filters and other parts of the indoor unit. You can do that yourselves (but it is required to follow the instructions!), or you may address the vendor – specialists will do that rapidly and professionally indeed, for a small fee.

Can I install a heat pump myself?

The installation of equipment and work with refrigerant gas requires specific knowledge and experience, therefore, in order to ensure that the equipment operates impeccably, we suggest choosing, in a responsible manner, technicians who have certificates of fitters of equipment with refrigerants as well as experience and the necessary tools. MITSUBISHI ELECTRIC and ECO2HEATING shall not be liable for operation or failures of equipment if it was installed inappropriately by unqualified and uncertified technicians.

Can a heat pump operate when the temperature outside falls below -25℃, and does this damage the heat pump in any way?

A heat pump operates even under lower temperatures, only the amount of released heat and the efficiency decreases, but this is good for the compressor of the appliance which is warm during operation. Starting a heat pump, when it is -25℃ or colder outside, is not good, therefore, we recommend using a heat pump constantly without turning it off, even if it is very cold outside. Constant operation of a heat pump only extends durability of the compressor.

MITSUBISHI ELECTRIC heat pumps, which are distributed in Ireland by ECO2HEATING, are adapted for operation precisely under the conditions of Northern climate. Models with an installed HyperHeating technology heat cost-efficiently when the temperature outside drops down to -25℃, while heat pumps with an installed ZUBADAN technology – even down to -28℃. The majority of other heat pump models guarantee cost-efficient heating down to -20℃ outdoor temperature.  

Residential air-to-air heat pumps with HyperHeating technology:

MSZ-FH-VEHZ wall-mounted heat pump

MFZ-KJ-VEHZ floor heat pump

Residential air-to-water heat pumps with ZUBADAN technology:

PUHZ-SHW112YHA split heat pump

PUHZ-HW112/140YHA package heat pump

Air-to-air heat pumps with ZUBADAN technology for commercial and industrial premises:

PUHZ-SHW-YHA split heat pump

Air-to-water heat pumps with ZUBADAN technology for commercial and industrial premises:

PUHZ-SHW-YHA split heat pump

What is recovery? Is it really necessary for my housing?

Recovery is mechanical ventilation of premises using a recovery system during which fresh air is supplied to the premises as heated (or cooled) by exhausted air (even up to 90 per cent of heat or coolness energy is recovered). Intake air and exhaust air are not mixed, they are separated by membranes of the heat exchanger of a recovery ventilator. If the heat exchanger is made from special paper, not only temperature exchange, but also moisture exchange takes place in it. A residential recovery system usually includes the following components:

  • Ductwork (pipeline) through which fresh air is supplied to all desired premises and exhausted from them;
  • Air valves regulating airflows; diffusers and a grille through which air gets from ductwork into the premises (and vice versa), other possible accessories, such as an electric heater, a CO2 sensor, silencers, etc.;
  • A ventilation unit – a plate, rotary or other recovery ventilator;
  • A remote control.

Fresh air is vital for all people, for their health and capacity to work, therefore, it is necessary to ventilate premises in one manner or another. Insufficient ventilation of houses is the main cause of the Sick Building Syndrome (in particular, in new or renovated residential buildings which are usually airtight). Stifling air, in combination with a too-high or too-low level of humidity, provides excellent conditions for the spread of various bacteria, mildew or rot, causes fatigue and various ailments as well as damages the building.

MITSUBISHI ELECTRIC ventilation appliances comply with the highest requirements with regard to recovery systems. Thanks to a patented Lossnay plate heat exchanger made from special paper, not only is efficient simultaneous supply of fresh air and extraction of stifling air ensured, but the energy of heat/coolness is recovered to the premises and the level of moisture is adjusted.

MITSUBISHI ELECTRIC Lossnay recovery systems:

Ducted recovery ventilators LGH-RVX for houses

Ducted recovery ventilators LGH-RVX for commercial premises

A wall-mounted mini recovery ventilator VL-100U5-E for apartments (no ductwork is needed)

Why is it better to ventilate using a recovery system than by opening windows?

When premises are ventilated by opening windows, in winter heat is exhausted from the premises, while in summer heat is let in. The premises are ventilated properly only if a draught is created, however, this causes a risk of catching a cold. In addition, through open windows, dust, other pollutants, noise and insects get inside. Thus keeping the windows open for a longer period of time is neither convenient, nor cost-efficient.

Ventilation of premises using modern recovery systems saves a major part of heat or coolness energy (up to 90 per cent!). This not only ensures supply of fresh air, but also does not increase heating or cooling costs, besides, there is no need to install more powerful heating/cooling equipment. It is possible to programme the operation of a recovery ventilator according to your daily schedule so that the ventilator works only when necessary. Thus ventilation of the home with a recovery ventilator is an economical and efficient manner of ventilation.

A MITSUBISHI ELECTRIC ventilation system, installed in housing, ensures particularly comfortable microclimate of premises: air exchange is ongoing, hygienic and comfortable living or working conditions are ensured; unpleasant odours are eliminated; the level of moisture is adjusted; dust and other pollutants are removed; energy is saved.

MITSUBISHI ELECTRIC Lossnay recovery systems:

Ducted recovery ventilators LGH-RVX for houses

Ducted recovery ventilators LGH-RVX for commercial premises

A wall-mounted mini recovery ventilator VL-100U5-E for apartments (no ductwork is needed)

There is a lack of ventilation in our apartment. Which recovery ventilator do you recommend if it is not possible to install ducts?

Apartments especially often face a problem of insufficient ventilation and related consequences – a sense of stifling air, foggy windows, spread of mildew, etc. However, usually there is no possibility to install ducts and a full ductwork system there.

In such a case, the most suitable ventilation solution would be installing a mini recovery ventilator which does not require ducts. A MITSUBISHI ELECTRIC wall-mounted mini recovery ventilator VL-100U5-E performs the same functions as a ducted recovery ventilator does, only that it is installed on the wall by drilling two holes. The appliance is very productive – it supplies an airflow of 60-105 m3/hour, while its coefficient of performance is up to 80%. In a patented Lossnay plate heat exchanger, not only the exchange of temperature, but also the exchange of moisture takes place – the level of humidity in the premises is adjusted. Ventilation of premises using a mini recovery ventilator VL-100U5-E will ensure fresh air, heat savings, non-foggy windows, no mildew and improved air quality in the entire apartment, with very low power consumption (just 15/31W).

A wall-mounted mini recovery ventilator VL-100U5-E for apartments (no ductwork is needed)

How much electric power does a recovery ventilator consume?

The consumption of electric power by a recovery system during ventilation of premises depends on the model and capacity of a ventilation appliance.

A MITSUBISHI ELECTRIC wall-mounted mini recovery ventilator VL-100U5-E, operating at its most intense mode, i.e. supplying 105 m3/hour of fresh air, consumes just 31W of electric power – thus, even if it operates at full capacity for the entire month, expenses for electric power will not even reach 3 € a month. If you ventilate using low-intensity mode, i.e. supplying 60 m3/hour of fresh air, electric power consumption is halved and stands only at 15W.

A MITSUBISHI ELECTRIC Lossnay LGH-RVX ducted recovery system also operates very cost-efficiently. For instance, a ventilation appliance LGH-25RVX intended for a 100 m2-size residential house, operating at full capacity – supplying 250 m3/hour of fresh air, will consume 62W of electric power, which will cost about 6 € a month. If you want to save even more, we recommend programming the operation of a recovery ventilator according to your life schedule. In this way you can save even up to 60 per cent of electric power consumption. Thus modern recovery (ventilation) systems for premises are very economical and it does not cost much to have excellent microclimate at home.

MITSUBISHI ELECTRIC Lossnay recovery systems:

Ducted recovery ventilators LGH-RVX for houses

Ducted recovery ventilators LGH-RVX for commercial premises

A wall-mounted mini recovery ventilator VL-100U5-E for apartments (no ductwork is needed)


    Simple calculator


    House area Heat quantity*
    Good thermal resistance requires about 40 W/m² Poorer thermal resistance requires about 60 W/m²
    100 m2 4 kW 6.0 kW
    125 m2 5 kW 7.5 kW
    150 m2 6 kW 9.0 kW
    175 m2 7 kW 10.5 kW
    200 m2 8 kW 12.0 kW
    225 m2 9 kW 13.5 kW
    250 m2 10 kW 15.0 kW
    275 m2 11 kW 16.5 kW
    300 m2 12 kW 18.0 kW

    *Specify capacities are preliminary. All depends on the size, layout and isolation. Also choosing the air-to-water heat pump should be added around 2kW power hot water.

    It depend on ceiling height: if it is significantly higher than normal, heated space volume will be significantly higher.

    Do not forget the windows: the resistance is usually much lower than the walls. Thus, larger window- lower thermal resistance, and therefore required more powerful heat pump, that would be enough to heat your home.

    Only a few weeks a year pump fully exploited. Therefore, we recommend not to choose too powerful pump, because in order have a good economy and low heating costs are always better when the heat pump works as a higher capacity. The way to save a lot of money. The heat pump steady work only prolong compressor life and reduce probability of failures.