Do Heat Pump Tumble Dryers Cause Condensation? (2023)

Heat pump tumbler dryers use a similar technology to the systems used for heating and cooling homes. They are most easily recognisable by their lack of a visible vent.

The heat pump tumble dryer drying circulates hot air, which absorbs the moisture from wet clothes. This moisture then continues through a processing system that evaporates it, leaving the clothes dry.

The process of evaporation raises the issue of condensation caused by the heat pump tumbler dryer. The heated air will travel through a drum until it gets to the evaporator. This is the area where the moisture is removed from the main system.

There is a holding system that stores the condensed moisture. This could be a tank or a tray, which must be emptied.

Overall, this design is more efficient than previous systems and uses a significantly lower temperature to dry the clothes.

Heat Pump Tumble Dryers and Condensation

Do Heat Pump Tumble Dryers Cause Condensation? (1)

Heat pump tumble dryers produce hot air that circulates through the system. In the process, this heated air will eventually hit areas that are cold and made of metal.

This can include the walls and windows of the dryer, for example. The difference in temperature between the hot air and cold surface can increase the level of condensation. This is why not all tumble dryers will display the same amount of collected moisture.

Moisture will collect on these surfaces, and this process is called condensation. When the tumbler drying is located in a room with a proper temperature setting, there will be less condensation. The difference between the temperature of the cold surfaces and the hot air increases the amount of condensation.

The Heat Pump Dryer’s Design

Heat pump dryers are designed to prevent problems related to condensation such as mould and mildew. The dryer can do this by routing the collected water into the contained area.

This type of dryer can also be located anywhere in the home because there is no need for a vent to route the air to the outside.

However, there are some circumstances in which condensation might still occur.

Areas where there are high levels of humidity can affect the dryer differently. If the humidity in the environment is very high, you might notice an increase in the level of water appearing on the outside condensing coils.

Nearby surfaces can also collect some of this moisture. This small amount of moisture should still be wiped from the coils every week to prevent mould and mildew from appearing in the area.

Heat Pump Tumbler Dryer Efficiency

Do Heat Pump Tumble Dryers Cause Condensation? (2)

Although the heat pump tumbler dryer functions in a similar way to a traditional condenser, there are certainly benefits for using this technology.

Previous generations of tumble dryers would simply route the hot, moist air through a vent system to the outside. This wastes all of the energy used to heat the air in the first place, and that drives up the cost of drying clothes.

Heat pump tumble dryers approach the same problem from a different angle. This design enables the system to cool the warm air instead of heating new air continuously.

These dryers significantly reduce the amount of heat used overall because the air is heated less than in traditional dryers. This energy efficiency is reflected in the lower cost of running a heat pump dryer.

Moisture Sensors in Heat Pump Dryers

Do Heat Pump Tumble Dryers Cause Condensation? (3)

The moisture in the clothes is monitored by a sensor. This piece of technology will cause the unit to shut off once it determines that the clothes inside of the dryer have fully dried.

Malfunctioning sensors could contribute to excess condensation in some cases.

After each load of laundry, you will need to remove and empty the lint tray and the water collection tray where the condensed moisture is stored.

Some dryers can also be modified to increase ventilation, which reduces the condensation.

Do Heat Pump Tumble Dryers Cause Condensation? (4)

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Do you get condensation with heat pump tumble dryer? ›

Your heat pump tumble dryer uses hot air to absorb moisture from your clothes in order to get them dry after a wash. After this air passes through the drum, it goes through the evaporator which removes the moisture, which is collected as condensation and stored into a tank.

Do heat pump dryers produce moisture? ›

As the name suggests, a heat pump dryer is a dryer model that uses a heat pump to generate moisture for drying clothes. This type of dryer is the newest model and uses the latest drying technology by incorporating a refrigerant of hot and cold coils system.

Are all heat pump dryers condensing? ›

A heat pump dryer is for all intents and purposes, a type of condenser clothes dryer. It uses a heat pump to heat the air and absorb moisture from your laundry. The warm damp air is then cooled to help remove the condensation and then reheated and recycled inside the unit to dry your fabrics.

Do all heat pump dryers leave clothes damp? ›

As heat pump dryers are more complex than vented dryers, they're likely to offer you a wider range of programs, such as woollens, sportswear or iron dry. Iron dry means clothes may still feel a little damp, but they'll be easier to iron.

What is the disadvantage of a heat pump tumble dryer? ›

What are the disadvantages of a heat pump tumble dryer?
  • They cost more to buy. Although the price of heat pump tumble dryers have gone down over the last few years, they still cost considerably more to buy than the other types of tumble dryer.
  • They dry clothes slower.
Sep 12, 2019

Do heat pumps give off condensation? ›

Heat pumps extract heat from one area and move it to another. In cooling mode, they take heat from the indoors and move it outdoors, cooling the air in the home. When in heating mode, heat energy is pulled from the outdoor air and exhausted into the home. During this normal operation, condensation is common.

Why doesn't my heat pump dryer dry my clothes? ›

The cleanliness of your heat pump dryer and it's sensors, will greatly effect your dryers performance. Your dryer might not be able to dry laundry completely if the lint filter is clogged. The lint filter gathers fluff and fibres from clothes and needs to be cleaned after every drying cycle.

Which is better condenser or heat pump dryer? ›

The heat pump drier is better for energy efficiency as it needs less fuel to dry the same load of clothes as a condenser dryer. However, the enhanced efficiency comes at a premium as it costs more to execute. Your budget and washing patterns will determine if it is worth the extra change.

Where does the water go in a heat pump dryer? ›

Your Heat Pump Tumble dryer comes with a built-in water tank to drain water. However, if you do not want to use the water tank, you can install a drain hose instead. A long drain hose is provided and can be used as an extension to the main drain hose.

Do you have to empty water from a heat pump dryer? ›

Yes, you do need to empty the water out of a heat pump tumble dryer. However, the tank is typically placed in a very easy-to-find location, usually on the front of the machine. And the only thing in the container is water. So, you can empty the container in the sink or in the bath, for example.

Is it worth buying a heat pump tumble dryer? ›

Overall, we think it is worth choosing a heat pump dryer due to the lower running costs. However, don't expect it to pay for itself quickly! Heat pump dryers have longer cycle times, so you can't afford to wait an extra 15 minutes to half an hour, it might be better to choose a condenser dryer.

Why does my heat pump dryer take so long to dry clothes? ›

This is normal and not a malfunction in any way. On these appliances, it may seem that the appliance is not heating for a long period of time at the start of a drying cycle. This is because all the heat pump's energy is used to heat and evaporate water/moisture in the clothing.

What is the main disadvantage of a heat pump? ›

A key drawback of air source heat pumps is that they simply don't provide the same level of heat that some homeowners have grown to expect. Although this sounds bad, it simply means this is a heating system that is best suited to underfloor heating and radiators.

How do I stop condensation in my tumble dryer? ›

Small rooms will become quickly very hot because of the tumble dryer and the air humidity will condense on surfaces at a lower temperature. The problem can be rectified in many cases with good ventilation, for instance, by opening a window or a door during the drying process.

Are heat pump dryers a fire risk? ›

Reduced Fire Hazard: The majority of dryer fires start when built-up lint near the motor, gas burners, or heating elements catch on fire. The fire then spreads to ignite lint in the vent pipe. Because heat pump dryers are ventless, that fire hazard is reduced.

How much condensation does a heat pump produce? ›

In fact, in cooling mode, heat pumps can drain as much as 20 gallons per day via the condensate drain line.

How much condensation does heat pump produce? ›

Ground wet? Pool heat pumps are capable of producing up to three to five gallons of condensation per hour of run time. A very simple way to test is to shut the unit off for several hours and leave the pool pump running. The water should start to disappear.

How do you stop condensation in a heat pump? ›

Use dry mode for heating and dehumidifying

When it comes to healthy home heating, it makes sense to offer a heating solution with dehumidifying qualities. Heat pumps do exactly that when set to Dry Mode. Dry Mode is a fantastic way to control moisture while heating your home during winter.

What is the advantage of a heat pump clothes dryer? ›

Rather than releasing warm, humid air through a dryer vent to the exterior of the home as a conventional dryer does, a heat pump dryer sends it through an evaporator to remove the moisture without losing too much heat. Making use of a refrigerant as part of this process means less electricity is used to generate heat.

Do heat pump dryers use a lot of electricity? ›

The main difference between condenser and heat pump dryers is their energy consumption: heat pump technology reuses hot air rather than constantly generating more heat; consequently, heat pump dryers use substantially less energy.

Do heat pump dryers take longer than condenser? ›

Because heatpump dryers dry at a lower temperature they can take longer to complete the drying cycle than a condenser model without heatpump technology. The best way to check the drying time is on the energy label.

Do heat pump dryers take longer to dry than vented? ›

Heat pump tumble dryers tend to take longer than conventional ones to dry your clothes. However, it's only usually by about 5-15 minutes, depending on the model that you purchase. The running costs and energy consumption levels are also much lower than a conventional tumble dryer.

How is the water removed from heat pump dryer? ›

A heat pump tumble dryer uses hot air to absorb moisture from your clothes. After this air passes through the drum, it goes through the evaporator, which removes the moisture. This is then collected and stored in a tank. The remaining air is reheated and used to continue drying your clothes.

Where should a heat pump tumble dryer be installed? ›

Ideally, they need to be placed as close to an external wall as possible so that the vent goes straight from the tumble dryer to the outside. However, as heat pump tumble dryers collect all of the water from your clothes in a reservoir built into the dryer, no moist air escapes the machine itself.

How does a heat pump dryer dry? ›

A heat pump tumble dryer uses hot air to absorb moisture from your clothes. After this air passes through the drum, it goes through the evaporator, which removes the moisture. This is then collected and stored in a tank. The remaining air is reheated and used to continue drying your clothes.

How long does a heat pump dryer last? ›

Heat pump dryer: very energy-efficient

This example is based on a dryer that lasts up to 10 years on average, depending on its usage.

Why does my LG heat pump dryer take so long to dry? ›

If your LG dryer is taking too long to dry your clothes or your dryer is not heating properly. A blockage to the dryer's airflow will make dry times longer than normal. This can be caused by an obstruction in the duct work or lint build-up on your air filter, both of which can corrected to fix the problem.

What are the pros and cons of a heat pump tumble dryer? ›

What are the pros and cons of heat pump tumble dryers? Pros: Energy costs are half or less compared to other electric dryers that don't use a heat pump. No vent required. Cons: Heat pump dryers tend to be slower at getting clothes dry compared to non-heat pump dryers, however many will have timer functions.

Why does my Samsung heat pump dryer take so long to dry? ›

If your drying time is too long, please check the following:

Check the lint screen. A clogged lint screen will restrict exhaust airflow which will cause the dryer to operate inefficiently. Check the exhaust vent for restrictions, bends, or kinks. If the Dryer is newly installed, the vent may be clogged.

Does heat pump produce condensate in winter? ›

When the heat pump is working to heat your home, it's normal for a bit of frost to form on the coils. This happens when the pump generates heat, the refrigerant turns to gas and then condenses when it meets the outdoor coil. In winter temperatures, this condensation will freeze.

Does a tumble dryer cause condensation? ›

The tumble dryer gives off heat to the surroundings and if the heat hits cold walls, windows, etc., condensation/moisture will form on the cold surfaces. (It is the air humidity in the room which condenses.) Make sure that the tumble dryer is located in a room with a temperature of around 20°C.

How do you stop excessive condensation? ›

Ways to Reduce Condensation in your Home
  1. Use Pan Lids When Cooking. ...
  2. Close Kitchen & Bathroom Doors. ...
  3. Dry Clothes Outdoors. ...
  4. Turn on Your Extractor Fan When Using Your Shower. ...
  5. Ensure Washing Machine Is Correctly Vented. ...
  6. Move Furniture Away from External Walls. ...
  7. Install an Extractor Fan.
Oct 1, 2022

Is it normal to have water around heat pump? ›

You will also find that the outdoor unit will drip water when using the heat pump in heating mode which is completely normal from the outdoor unit coil condensation.

Why is my heat pump not dehumidifying? ›

You Likely Have an Oversized or Undersized Air Conditioner

A system that's too small can't handle the amount of air inside your house. At the same time, an oversized air conditioner has too much cooling capacity, which prevents the unit from properly dehumidifying your house.

What happens to the moisture in a heat pump dryer? ›

Heat pump dryers, on the other hand, are condenser dryers. This means the moisture is collected in an onboard water tank instead of vented into the room. You do have to occasionally empty the tank but you can use this water on your garden, or you can plumb the dryer into a drain.

At what point does a heat pump become inefficient? ›

Heat pumps do not operate as efficiently when temperatures drop to between 25 and 40 degrees Fahrenheit for most systems. A heat pump works best when the temperature is above 40. Once outdoor temperatures drop to 40 degrees, heat pumps start losing efficiency, and they consume more energy to do their jobs.

What is the downside to a heat pump? ›

Air source heat pumps can experience issues such as icing in cold temperatures, which can ultimately damage the system. Although modern heat pumps do often have automatic defrosting. Their efficiency will also be lower at very cold temperatures, and use more electricity during those cold days.

Why is my heat pump dryer leaking water underneath? ›

Blocked ventilation is often the reason why a dryer is leaking water. The dryer works by heating air and distributing it around the drum to dry the clothes. If the dryer is unable to vent the warm air, it condenses and causes water to collect in the dryer.

Should heat pump run constantly in winter? ›

Heat pumps are designed to constantly run when winter hits and the weather outside gets cold. As temperatures drop below 30 degrees, your home's heat demand matches the production of the heat pump, requiring it to run continuously to move warm air through the home. This is known as the balance point.

How do you stop condensation in a tumble dryer? ›

Small rooms will become quickly very hot because of the tumble dryer and the air humidity will condense on surfaces at a lower temperature. The problem can be rectified in many cases with good ventilation, for instance, by opening a window or a door during the drying process.

Why is there so much condensation in my laundry room? ›

Condensation on windows, walls and other surfaces is a clear sign of insufficient ventilation. Make sure all appliances are in good working order. Clogged filters can cause leakages and unnecessary energy waste. Dryers always have lint filters, which should be cleaned after every cycle.


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