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JBG-2 Sp. z o.o., al. Jana Pawła II 46, 44-240 Żory, Poland Office:A key element in choosing the right heat pump is its energy class. In this article, we will thoroughly explain what the energy class of a heat pump is, how it is determined, and why it is so important. Additionally, we will discuss the impact of different supply temperatures on the efficiency of heat pumps.
The energy class is an indicator that determines the energy efficiency of a device. In the case of heat pumps, it is particularly important because it indicates how efficiently the device converts electrical energy into heat. Energy classes are represented by letters ranging from A+++ (highest efficiency) to D (lowest efficiency). A higher energy class means that the device consumes less electrical energy to produce the same amount of heat, which translates to lower operating costs and a smaller environmental impact.
The energy class of heat pumps is determined based on standard tests conducted in accordance with European standards. These tests take into account various operating conditions, including external temperatures and supply temperatures of the heating system. Based on the results of these tests, the Seasonal Coefficient of Performance (SCOP) is calculated, which serves as the basis for determining the device's energy class.
The supply temperature is the temperature to which the heat pump heats the water in the heating system. It is crucial for the efficiency of the heat pump. A lower supply temperature allows for higher energy efficiency because the heat pump operates under more optimal conditions.
A supply temperature of 35°C is typical for modern low-temperature systems, such as underfloor heating, wall-mounted, or ceiling-mounted systems. These systems are becoming increasingly popular due to their efficiency and user comfort.
Heat pumps operating at a supply temperature of 35°C generally achieve the highest energy classes, even A+++. High efficiency results from the smaller temperature difference between the heat source and the heating medium, allowing for more efficient energy utilization.
A supply temperature of 55°C is characteristic of traditional heating systems based on radiators. This is a common solution in modernized buildings where replacing the entire heating system with a low-temperature one would be too costly or impractical.
Heat pumps operating at a supply temperature of 55°C have lower efficiency compared to those operating at 35°C but can still achieve high energy classes, such as A+ or A++. Although the difference in efficiency is noticeable, modern heat pumps are designed to ensure optimal performance even at higher supply temperatures. For example, Polish JBG HT heat pumps achieve an energy class of A+++ even at a supply temperature of 55 degrees.
One of the main factors influencing the decision to choose a heat pump is operating costs. Devices with a higher energy class consume less electrical energy, which translates to lower electricity bills. In the long run, investing in a heat pump with a higher energy class can lead to significant savings. It is estimated that choosing a heat pump with an A+++/A+++ class can save up to 20% compared to using heat pumps with a lower class.
Heat pumps are already an environmentally friendly solution because they utilize renewable energy sources such as air, water, or ground. However, devices with a higher energy class are even more eco-friendly because they emit less carbon dioxide (CO2) during operation. Choosing a heat pump with a high energy class contributes to reducing the carbon footprint of our home.
Installing a modern and energy-efficient heat pump can increase the value of the property. Potential buyers are increasingly paying attention to operating costs and the environmental friendliness of buildings, and heat pumps with a high energy class are perceived as an attractive feature of a home.
Currently, the highest energy class for heat pumps is A+++. The class is assigned based on the seasonal efficiency coefficient (ηs), also known as the Seasonal Coefficient of Performance (SCOP). This parameter determines the energy efficiency of heat pumps on a seasonal basis. It is expressed as a percentage and reflects how efficiently the heat pump converts electrical energy into heat throughout the heating season.
Examples of devices with the highest ηs coefficients are Polish JBG HT heat pumps from the ZHHS series. The inverter heat pump JBG HT 15K features a ηs of 213% (at 35 degrees) and 156% (at 55 degrees). This places the 15K heat pump in the top tier of devices on the European market in terms of performance. Similar parameters are characteristic of the R290 propane heat pump JBG HT 10K – 193% and 154%. Both models from the Polish manufacturer possess the highest energy class of A+++/A+++.
The energy class of a heat pump is a key indicator of its efficiency in converting electrical energy into heat. A higher energy class means greater efficiency, lower operating costs, and a smaller environmental impact. The efficiency of a heat pump also depends on the supply temperature, with lower supply temperatures (35°C) allowing for higher energy efficiency. When choosing a heat pump, it is worth paying attention to its energy class and matching it to the specifics of the heating system in our home.
Investing in a heat pump with a high energy class is a decision that will bring both financial and environmental benefits, contributing to thermal comfort in the home and environmental protection.
Check also - heat pumps with enhanced energy efficiency classes
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