We will determine which heating system is more profitable for a house of 213 m2, compare different heat pumps.

For an example, consider how to choose a heat pump for an energy efficient house of 213 m2 in the Kiev region.

Before choosing the heat sources for the heating and hot water system, you should calculate the maximum amount of heat for comfort in the home.

To do this, we need to make a energy audit of a project or a built house.
For projected buildings, we can already, at the stage of development of an architectural project, calculate heat loss in winter and heat revenues in the summer and carry out an analysis of return on investment in various energy-efficient equipment.

For this energy efficient home using the Passive House Planning (PHPP) program, the following balance is obtained:

And the energy consumption schedule of the house in months.

Based on the calculations we received:

The nominal heat loss of the house is 6 kW (maximum peak up to 8 kW)
Power is required for heating the water in the system of hot water supply - 2 kW
The power of the cooling system in the summer period is 2.5 kW (when using sun-glass windows or active external sunscreen)

The annual energy consumption for heating and DHW is 18736 kW
The energy consumption for cooling is 800 kW

Based on these data we take the necessary power of the source of the heating and hot water supply system - 10-12 kW

Heating of the house - a system of warm floor. HWP - indirect heating boiler with an electric energy - 200 liters.

Now let's count on what we will manage the cost of equipment for different systems and what will be the finished costs of heating and PRT selected system.

Let's start with the simplest

Heating system of the house №1 Electro-boiler 8 kW + electric boiler.

Together, the cost of equipment and supply of energy - 5500 €.
Annual expenses for the operation of the house - 1923 €.

Heating system of the house №2 Gas boiler + indirect heating boiler

Equipment (gas boiler + connection) - 45000 UAH.

The gas supply to the site with design and installation works, an average of 168,000 UAH.

Conditioners - 60000 hryvnas

Taking into account the efficiency of the boiler with 1 m3 of gas, we get 8-9 kW of heat. The cost of gas for the population in June 2019 - 8.6 UAH / m3

Costs for equipment and supply of energy - 273 000 UAH.

Together, the cost of heating and hot water with the help of gas - 17598 UAH / year
Cooling still remains - 400 hryvnas.

Given the cost of gas connection to the budget, this decision will not be called.
Now calculate what we will use to use a heat pump.

The market is full of offers from different manufacturers and a 10 kW heat pump costs from 80 to 240 thousand UAH.

We want to note that our acquaintance with heat pumps began in 2009 with the installation of a soil heat pump on one of our facilities. And in 2019 we were trained at a plant for the production of heat pumps in Sweden.

But let's start with the most budget proposal.

System №3. An inexpensive air heat pump from a European company manufactured in China.

The price of such a heat pump from - 90000 UAH. Installation - from 15000 UAH.

But when buying any equipment you should read what is written in small print ..

This heat pump provides a power of 10 kW at B9 / W35 with a efficiency of 4.56 (COP), which means that it works at +9 in the street and 35 degrees in the heating system.

How then, at this temperature, we already shut off the heating system, because at this temperature outside for heating enough internal heat revenues from people and equipment.

And if we need hot water then we do not have enough of 35 degrees and we need to include an electrician for DHW heating in the boiler. Efficiency also suffers.

But the most important question will be to work effectively in freezing (since the average January temperature is 7-10 degrees Celsius)

To understand this issue we need a graph of the performance of the heat pump based on the outside temperature

And here we see that COP at -10 = 2,2 and the further the lower. This means that with a compressor power of 1.3 kW, we can receive 2.86 kW of heat.

And where do you get the rest? You must ask.

And the rest is taken from the built-in electrons (if any). That is, an inexpensive heat pump in the freezer turns into an ordinary electric car.

Let's try to find the electrons in the description of such a heat pump and we see that they are only 2.5 kW.

Accordingly, such a decision can give us only 5,45 kW from 10. And if the street will be -20 then only 3.8 kW.

It's good that we learned about it during the calculation and not in the winter in practice.

What should you do in this case? It is necessary to buy a small heat accumulator with built-in 6-kW electric energy. And have enough power on the network.

The heat accumulator and its connection is still + 20000 hryvnas.
That is, the cost of connecting 15 kW we remain.

And the savings are not as rosy as in the booklet.

With this solution, our costs for DHW and heating - 9230 UAH.

The booklet says that this pump can provide us with cooling and cooling through the fan coils

Such a decision costs about 45 thousand UAH

The cost of cooling as with air conditioners - 400 UAH / year

Together the equipment and connection of the energy carrier - 210000 UAH

Operating costs for heating and cooling - 9830 UAH / year

Considering the guarantee for such high-loaded equipment for only a year, that decision is controversial, and this is the case when modernizing the heating system with a gas boiler.

Option 4 Stop looking for adventure on your back and choose a heat pump with a 5 year warranty and high-quality components and a production management system in Sweden.

Such a heat pump with a heat accumulator and a boiler costs 255000 hryvnas with installation.
This equipment has SCOP (nominal) B0 / W35 - 3.9 and B0 / W55 - 3.1

For support in severe frosts there is a dual TEN and a network load meter. This means that the heat pump relieves the electrical power supply and connects the electricity supply only when there are no other powerful consumers (iron, kettle, oven ...)

The downside of this pump is that it does not work for cooling. Therefore, the cost of air conditioning remain.

This heat pump can be used with a connected electric power of 10 kW.

Together, the cost of equipment and connection of the energy carrier - 340000 UAH

The total cost of heating and GVP when using such equipment is 7017 UAH / year

Cooling - 400 UAH / year.

It is known that the most effective heat pumps are soil.

Let's count such variants. In the budget option, we will choose a soil heat pump of the Ukrainian manufacturer who has proven well in the last 10 years of operation.

A variant of the heating system of cottage №5 Soil heat pump Ukraine

An additional expense when installing such a heat pump is the organization of soil contour which consists of 5 wells with a depth of 50-60 m м

The supply of wells in the budget option is carried out by a dense drilling mud (according to the technology it is not correct but in Ukraine, basically, do it)

Equipment and installation of a heat pump - 159 300 hryvnas
Organization of soil contour - 150000 UAH

Due to the fact that the soil temperature in the well does not vary depending on the outside temperature, the conversion coefficient of the heat pump is stable COP B9 / W35 - 4.2

Annual expenses on heating and GVP at the use of such a heat pump - 4192 UAH

Cooling of the house is a passive cold from the soil wells on the fan coils.
The cost of the fan coils system is UAH 40,000.

Costs of cooling (only the work of circulating pumps and fans) - 100 UAH / year

This solution will work smoothly with the connected electrical power of 5-6 kW.

Accordingly, to increase the standard power connection is not required.

Total equipment costs - 349300 UAH
Annual expenses for heating and cooling - 4292 UAH / year.

And the final version in comparison with heat pumps remained - this is Volvo's top equipment in the world of heat pumps.

Option #6 Soil heat pump Sweden

Dokładność studni jest przeprowadzana zgodnie ze wszystkimi zasadami, mieszanka bębnowa, która niezawodnie betonuje studnie i zapewnia maksymalne usuwanie ciepła z gleby.

Koszt takiego sprzętu z instalacją - 321 570 UAH

Wiercenie i tamponowanie studni z niemieckim rozwiązaniem tamponowym - 20000 UAH

Klimakonwektory z montażem (lub wymiennikiem ciepła w systemie wentylacji z rekuperacją) - 40000 UAH

Stabilny współczynnik COP tej pompy ciepła wynosi 4,6

Pełna gwarancja na sprzęt - 5 lat

Całkowity koszt sprzętu z instalacją - 561 570 hrywien.

Koszt ogrzewania, ciepłej wody użytkowej i chłodzenia - 3900 UAH / rok.

To simplify the analysis, we will reduce all data to one table.

And we will take the cost of heating DHW and cooling for 15 years, taking into account the average rise in tariffs by 15% per year (usually there are issues running Chinese and Ukrainian heat pumps for 15 years)

Conclusion: What is cheaper than initial costs is logically more expensive than operating costs.

Weighing the risks of poor-quality equipment of a dubious manufacturer to choose the system of untested manufacturers more expensive.

And it is worth remembering that the boiler house designed for one heat pump is unlikely to be suitable for another.

Now you can more consciously choose the heating system for your home

Read articles about heat pumps and see prices for different homes

If you have a task to calculate the heat and heat consumption of your home and also to pick up and mount a heat pump then feel free to contact us. We will be glad to help you.