Frequently asked questions
How do I choose the right air source heat pump? Can I buy an air source heat pump as a private consumer? The indoor unit of my air source heat pump is dripping water, what to do? Answers to these and many other frequently asked questions about air source heat pumps.
Delivery & Pickup
We deliver everywhere in Finland.
All orders under 25 kg will be delivered to your chosen Posti pickup point, and orders heavier than that will be delivered to your door by UPS.
You can see the shipping costs after entering your address in the order.
Delivery times:
Post 2-5 business days
UPS Standard 2-5 business days
UPS Express 1-4 business days
Yes. To be able to pick up your product before your scheduled pick-up time, please first contact our customer service by phone at 09 4289 1192 or by email @myynti@hesatek.fi .
Air source heat pumps
Yes. You can install a cooling air-source heat pump in an apartment building. However, it is a good idea to contact the building company and submit an application for modification work before purchasing.
You can!
When purchasing a heat pump from our online store, we ask you to provide information about the installer you used (Tukes number).
This way we can ensure that the installation is carried out by a qualified installation company, with professional skills and the correct permits.
Expert installation is also in the customer's interest, as it ensures the factory warranty and that the device functions properly.
The Finnish Gas Act requires the use of a certified installer for the installation of an air-source heat pump. Electrification also mainly requires valid electrical installation permits. This also ensures that you receive a valid full warranty for the product you purchase. When ordering an air-source heat pump without installation, the customer must fill out the Declaration of use of a qualified installation company
- Follow the device's operating and maintenance instructions.
- Make sure that the device is intended for that use, i.e. make sure that the device is installed for cooling or can the device also be used for heating?
- Have maintenance and repairs carried out by a qualified installation company.
- Clean the filters of the indoor unit regularly
- The indoor unit should be washed every 3-4 years in addition to regular maintenance.
- Remove leaves and needles that accumulate in the outdoor unit
The SCOP value given to air source heat pumps is the energy efficiency measured over the entire year (Seasonal Coefficient Of Performance). SCOP 5.1 means that if 1 kW of electricity is fed into the heat pump, the heat pump produces 5.1 kW of heat.
The price of an air source heat pump with basic installation ranges from two thousand euros to two thousand euros, depending on the model. How is the payback period calculated for an air source heat pump in this price range? The best A+++ heat pumps have a SCOP of 5.1 or slightly more. The SCOP value given to air source heat pumps is the energy efficiency measured over the entire year (Seasonal Coefficient Of Preformance). SCOP 5.1 means that if 1 kW of electricity is fed into the heat pump, the heat pump produces 5.1 kW of heat.
The SCOP value is based on measurements made in Central Europe and therefore does not fully correspond to our cold conditions. All manufacturers are obliged to state the Central European measurement values. There is also a SCOP test for machines suitable for Northern Europe, but few manufacturers state or do this. The Northern European SCOP value is usually around 3-4 depending on the machine.
If we calculate the payback period for a house that consumes about 20,000 kWh per year for heating, so that the air source heat pump covers about half of the heating demand and the SCOP of the air source heat pump is 3.5, we get 10,000 kWh/3.5 = 2,857 kWh, or about 7,000 kWh in savings per year. In this theoretical example, the air source heat pump pays for itself in about three years at today's electricity prices (10 c/kWh), including transmission fees and taxes.
How big is the space where the air source heat pump indoor unit will be installed? Do I want both cooling and heating in the space, or will just one be enough?
The more open the space, the wider the heat produced in the apartment spreads.
When choosing an air-source heat pump, essential information includes, for example, the following:
• Apartment size
• Heat requirement
• Energy class of the house
• Apartment floor plan
• Space of premises
Air source heat pumps contain a refrigerant that moves as a mixture of gas and liquid in a closed pipe system between the indoor and outdoor units of the air source heat pump. The circulation and evaporation of the refrigerant causes the air source heat pumps to blow either cold or warm air into the interior. The traditional refrigerant in already installed pumps is R410A refrigerant, which is being replaced by the new R32 refrigerant. GWP (Global Warming Potential) is a value that is expressed as a number, which is the load of the refrigerant in terms of climate change. The value of R401A is 2088 and R32 is only 675, respectively. Air source heat pumps operating with R32 refrigerant have recently entered our market, such as the Mitsubishi Electric LN series air source heat pumps and Gree.
The user must take care of cleaning the coarse filter of the indoor unit and
cleaning of the outdoor unit. The coarse filter
Cleaning should be done regularly, at least every 2 weeks. Coarse filter
can be found under the front cover of the heat pump. It can be cleaned by vacuuming –
or if there is still visible dirt left in the filter – under the tap. The filter
must be allowed to dry before being reinstalled. In general, the dirtier the indoor air, the dirtier the filter will be. If you have pets at home or the device is located in a dusty garage – or if there is smoking in the premises, a coarse filter is recommended.
cleaned during the weekly cleaning.
The cleanliness of the indoor unit has a direct impact on the performance of the device.
efficiency. In a dirty device, the efficiency decreases, which also affects cost-effectiveness and reduces the device's saving effect. The indoor unit
Dirtiness can also cause freezing problems in the outdoor unit – in practice
The outdoor unit will freeze if there is not enough air flowing through the indoor unit.
The owner of an air source heat pump is also required to keep the outdoor unit clean. In practice, care must be taken to ensure that the outdoor unit
No twigs or other debris get caught between the rope rotating inside.
Usually, only around €20–40 worth of electricity is used to cool a home during the summer. Even if the air source heat pump is on day and night in June, July and August,
Even then, the price of cooling will only be a maximum of €100 for the whole
from the summer season.
The electricity consumption of an air-source heat pump in cooling mode is therefore very
small. Cooling is significantly cheaper than heating.
It is important to note that the price of cooling is affected by factors such as the size of the apartment, the
location, desired indoor temperature and quality of the air source heat pump.
We recommend that you clean the air filter at least every three months. If the filter is heavily dusted, clean it more often. The coarse filter should be replaced if it is broken, worn or has accumulated dirt.
Fault situations
In summer and in extreme heat or high humidity, the indoor unit of an air source heat pump may start to drip water. There can be several reasons for this and we recommend that you go through the following problems:
1) Problem: The device settings are incorrect.
- Check on the remote control that the air source heat pump's target temperature is not below 23-24 degrees Celsius. This is the target temperature to which the device will try to cool the room. The air blown by the device is cooler than the target temperature and in humid weather, the cold blown air may condense on the fins of the indoor unit.
- Check that the air source heat pump fan speed is not set to "AUTO" and that the fan speed is at least level 2. As a rule of thumb, it is recommended to keep the device at the highest possible fan speed. If the fan speed is too low and the air cannot circulate throughout the apartment, a "microclimate" may form around the device, causing the air to condense on the fins of the indoor unit.
2) Problem: condensation water cannot drain out of the indoor unit unhindered.
- Check that the end of the condensate hose leading out of the indoor unit is lower than any other point in the condensate hose. If the condensate hose does not have a slope all the way, water may start to flow back towards the indoor unit.
- Check that the end of the condensation hose is not under water if it is directed to the condensation container.
3) Problem: There is a blockage in the condensation water hose.
- If the air source heat pump has not been serviced for a while, or has been put into use after a long break, the condensation water hose may have become blocked by dust or other indoor air dirt. We do not recommend removing the blockage yourself, but in this case it is worth contacting the store that installed the device.
Note: To avoid moisture damage, we recommend turning off the device as soon as possible after detecting a problem.
If necessary, you can call our technical support phone number for technical problems with air source heat pumps or for matters related to user instructions.
The service is open weekdays from 9:00 to 15:00.
The cost of the call is €2.95 / min + data, waiting time is free of charge.
When the air source heat pump is in heating mode, the outdoor unit may start to produce defrost water.
The amount of water produced by an outdoor unit varies depending on the brand, model, operating settings, and environmental conditions.
The formation of meltwater is not harmful in itself, but it may cause problems, for example if it flows into the stone base or foundations of a building.
If the ice build-up grows so large that it touches the bottom of the outdoor unit on a ground support stand or wall mount, a resonance sound may occur.
Directing the melt water away from the stone base and under the outdoor unit is easy with a melt water guide made of special HDPE plastic.
Check out the defrost water controllers we sell:
When the air-to-air heat pump is in heating mode, the refrigerant circulating in the system absorbs heat energy from the outdoor air, causing the outdoor unit's cell to cool down.
Moisture in the outdoor air tends to freeze when it encounters the cold air of the outdoor unit.
The phenomenon occurs especially when the outside temperature is below zero degrees.
This is normal operation and indicates that the device is working properly.
The device's automatic system always defrosts the ice from time to time.
The indoor unit is normally subject to thermal expansion during the defrost cycle and
noises related to the refrigerant cycle, such as hissing, clicking or water gurgling
audible noise. The noises are common and are caused by changes in the refrigerant temperature.
The device's automatic system controls the length and repetition interval of the defrost cycle.
always as needed. Usually, an air-source heat pump defrosts about 2-3 times an hour.
General
If you are a consumer, you have the right under the Finnish Consumer Protection Act to cancel your order by notifying us of this no later than 14 days after receiving the goods or the last batch of goods or, in the case of regular delivery of goods, after receiving the first batch of goods.
If you would like to return your order, please contact our customer service by phone at 09 4289 1192 or by email at myynti@hesatek.fi
Any questions?
If you did not find the answer to your question, please contact us by phone or email. Our customer service is open weekdays from 8 am to 3 pm.