Principles of operation


A HEAT PUMP EXTRACTING HEAT FROM SOIL, ROCKS, WATER OR AIR CAN CONSIDERABLY REDUCE YOUR COSTS OF HEATING OF HOUSING OR HEATING OF WATER.   silumos_siurblio_veikimo_principas   A heat pump operates on the same principle as a refrigerator does. In a refrigerator, heat is extracted from the inside of the refrigerator and released into the environment at the back of the refrigerator. A heat pump extracts heat from soil, rocks, air or water and distributes it to your home. Due to solar heat present in rocks, soil, air or water, each kWh of input power required for a heat pump’s operation is converted into 3-5 kWh of output heat in a house.


Traditionally, energy efficiency is assessed by using coefficients EER (Energy Efficiency Ratio) (for cooling) and COP (Coefficient of Performance) (for heating). These coefficients show how much output coolness or heat (kW) is generated per 1 kW of input electric power consumed. The main shortcoming of these indicators is the following: all manufacturers, as a rule, measure them under the same outdoor air temperature – EER, under the temperature of +35℃, and COP, under +7℃. As from 2014 (the year 2013 is transitional) new seasonal energy efficiency coefficients of equipment are introduced –SEER (Seasonal Energy Efficiency Ratio) (for cooling) and SCOP (Seasonal Coefficient of Performance) (for heating). These new coefficients reflect the efficiency of equipment more accurately since these are average amounts which are calculated at four temperature points (see structured charts below). seer_ir_scop_kreives

  • Seasonal Energy Efficiency Ratio (SEER) is the total energy efficiency ratio of an appliance during the entire cooling season calculated by dividing the standard annual cooling demand by the annual electric power input for cooling.
  • Seasonal Coefficient of Performance (SCOP) is the total coefficient of performance of an appliance corresponding to the entire established heating season and calculated by dividing the standard annual heating demand by the annual electric power input for heating.

MITSUBISHI ELECTRIC is proud to introduce into the market new Kirigamine MSZ-FH-VEHZ heat pumps with particularly high SEER and SCOP!


Heat pumps of this type consist of an outdoor unit and one or more indoor sections. The outdoor unit takes heat from outside air and transmits it to the indoor sections which, under the impact of a fan, spread the heat inside. It is impossible to heat radiators with pumps of this type. If outdoor temperature falls, the efficiency of a pump decreases. An air pump can usually save about 30-50 per cent of heating expenses (without considering water heating expenses). Heat pumps of this type perfectly supplement other heating systems, for instance, direct electric heating, fireplaces, ovens, gas boilers. In order to save as much as possible, it is important that the existing heating system of a house is appropriately installed and thermodynamic sensors operate adequately. In order to save, the location where a heat pump will be placed is also very important. The layout of a house should be suitable for distributing heat equally efficiently in all rooms. In summer, these heat pumps are often used for air conditioning and reduction of moisture, however, then less energy is saved. From the point of view of energy savings, these pumps are a significantly cheaper investment compared to other systems of hot air pumps. It is important that these pumps clean and refresh air at your home, thus improving it.


dc593c5e18ea99d693e998167c7c5a1f Heat pumps take heat from outside according to a similar principle as air-to-air pumps, but instead of converting air into heat, they heat water. Air-to-water heat pumps can heat both water and air by supplying heat to your home through heated floor systems and radiators. Heat pumps, installed outdoors, take heat from air. This energy heats water in a tank located in the premises. Air-to-water heat pumps can save approximately 50-60% of the heat required for heating a house and hot water annually. Even if the outdoor temperature is lower, energy savings are almost the same. Installation of an air-to-water heat pump usually costs less than installation of a different geothermal pump. An air-to-water heat pump consumes the same amount of energy as geothermal heat pumps do. Besides, you do not need to drill looking for a heat source, which means that the installation of air-to-water pumps is much simpler. MITSUBISHI ELECTRIC is one of the leading companies in the market of heat pumps. The majority of heat pumps have been created to be used for air cooling in hot climates. MITSUBISHI ELECTRIC heat pumps have been created and adapted for use in Northern countries where the climate is much colder and higher quality and long-lasting equipment is required. For this reason, all heat pumps are manufactured only in MITSUBISHI ELECTRIC plants where they are also tested to ensure that the quality of an appliance is in conformity with Northern climate conditions.

AIR-AIR heat pump operating principle

AIR-WATER heat pump operating principle

Recovery Ventilation system operating principle

ALL IN ONE heating, cooling, ventilation system