Heat Pumps in Seattle

Heat pump systems provide versatile heating, cooling, and humidity control—they move heat outside your home in the summer and pull heat into your home in the winter. For those in moderate climates, where the temperature doesn’t regularly drop below freezing, a heat pump can be the answer to your home comfort needs.

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What to look for in a heat pump?

Sound Performance

Variable-speed and two-stage models provide ultra-quiet operation compared to models with single-stage compressors. In addition, heat pumps that include sound blankets and our Silencer System II™ design can further reduce sound levels.

Energy Efficient

Now you can replace your existing furnace serving large areas of space with an efficient Mitsubishi Electric system.


That it can be zoned, altered or added to or even dual functional. Which means heating one room while at the same time cooling another.

Environmentally Friendly

One inch R4.2, fiberglass-free insulation reduces condensation and boosts efficiency.

Which heat pump is right for your home?

There are all sorts of options. We can give you advice on the system best suited to your specific needs.

Whether you have a single uncomfortable room, you’re renovating your entire house, or you’re building a home from scratch, we have a solution that fits your unique needs. Because you live in individual living spaces rather than treating every room the same, we will give you a customizable, more energy efficient and easier to install.

There are 4 main reasons why you need a heat pump

We can help you determine the perfect match for your desired application and size the equipment properly for your home.

Contact us to visit your home and understand your heating and cooling needs.


With over 35 year of experience and 14 year with DUS, Inc. caring for comfort in Washington.

Home is our favorite place! It is very gratifying to have a home that is comfortable and cozy for the family! We at DUS, Inc. know this! We are born of a dream to make the difference in comfort!

For us, HVAC is not only the installation of equipments or planning projects, but also the craftsman demands measures specific to each case. So we can say that we care about the details.

We are proud to have worked in the Washington market since March 2006 taking care of the comfort of families in a personalized way!


Your comfort is our priority!

Let us be your quality HVAC contractor

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What to discuss when you meet with our technician?

  • How many zones you need.
  • Where indoor and outdoor units might be placed.
  • If you’re replacing or supplementing an existing system.
  • If you prefer ductless or ducted options (or a mix).
  • What to expect during the installation process.

Sounds pretty good, right? Soon you’ll have your estimated cost, and after that – a future filled with personalized comfort and energy savings.

Common questions

A heat pump is part of a heating and cooling system and is installed outside your home. Like an air conditioner, it can cool your home, but it’s also capable of providing heat. In cooler months, a heat pump pulls heat from the cold outdoor air and transfers it indoors, and in warmer months, it pulls heat out of indoor air to cool your home. They are powered by electricity and transfer heat using refrigerant to provide comfort all year round. Because they handle both cooling and heating, homeowners may not need to install separate systems to heat their homes. In colder climates, an electric heat strip can be added to the indoor fan coil for additional capabilities. Heat pumps do not burn fossil fuel like furnaces do, making them more environmentally friendly.

Heat pumps do not create heat. They redistribute heat from the air or ground and use a refrigerant that circulates between the indoor fan coil (air handler) unit and the outdoor compressor to transfer the heat.

In cooling mode, a heat pump absorbs heat inside your home and releases it outdoors. In heating mode, the heat pump absorbs heat from the ground or outside air (even cold air) and releases it indoors.

The two most common types of heat pumps are air-source and ground-source. Air-source heat pumps transfer heat between indoor air and outdoor air, and are more popular for residential heating and cooling.

Ground-source heat pumps, sometimes called geothermal heat pumps, transfer heat between the air inside your home and the ground outside. These are more expensive to install but are typically more efficient and have a lower operating cost due to the consistency of the ground temperature throughout the year.

Heat pumps are more common in milder climates, where the temperature does not typically drop below freezing. In colder regions, they can also be combined with furnaces for energy-efficient heating on all but the coldest days. When the temperature outside drops too low for the heat pump to operate effectively, the system will instead use the furnace to generate heat. This kind of system is often called a dual fuel system – it is very energy efficient and cost effective.

Major components of a heat pump system:

Outdoor unit with a coil that acts as a condenser in cooling mode and an evaporator in heating mode Indoor unit that contains a coil (just like the outdoor unit) and a fan to move the air through your home Refrigerant that absorbs and releases the heat as it circulates through the system Compressor that pressurizes the refrigerant Reversing valve that changes the direction of the refrigerant in the system, to enable the shift between heating and cooling Expansion valve that regulates the flow of refrigerant through the system.

Main brands we work with:

What Our Customers Say

Need Help with your installation?

Home is our favorite place! It is very gratifying to have a home that is comfortable and cozy for the family! We at DUS, Inc. know this! We are born of a dream to make the difference in comfort!


We are proud to have worked in the Washington market since March 2006