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The Varied Advantages of Ductless Heating and Cooling

Ductless heating and cooling systems are designed to deliver multiple installation and mounting options tailored to the interior design specifications of the home and business owner. From simple space conditioning, to whole-home ductless heating and cooling, discover all the advantages ductless systems offer for your project.

How Ductless Systems Work

Ductless systems are available as cooling-specific units or as ductless air-source heat pumps, providing exceptional heating and cooling efficiency by leveraging the natural properties of heat energy to move from a warmer place to a cooler place. High efficiency refrigerant is placed through a series of temperature and pressure changes, which extracts, moves and releases heat energy from the air around the heat-exchange coils.

One heat exchange coil is housed inside the indoor air handling unit (AHU), along with a fan, indoor air quality filtration system and additional electronic components which monitor system performance. A second heat exchange coil is housed within a durable cabinet located outside the home, typically alongside the exterior wall adjacent to the living space to be conditioned.

The power cable, refrigerant line and condensate tubing are insulated in a thin conduit or two-piping system. The conduit only needs a small hole through the exterior wall to connect the outside cabinet containing the compressor and heat exchange coil to each AHU. This practical connection of system components with minimal fuss and obtrusion is the primary advantage of ductless heating and cooling systems – no ductwork required. 

Configurable and Modular

Ductless systems may consist of one AHU or practically any number of AHUs to meet project specifications. These are some applications ideally suited for ductless systems:

  • Whole-home heating and cooling - You may install up to eight indoor AHUs (i.e. eight zones) for each outside unit. If the designs for your new energy-efficient home or system replacement call for more than eight zones, additional outside units may be inconspicuously installed next to an exterior wall, mounted to the home shell or located on a flat roof.
  • Room additions - One question that must be answered when adding new living space to the home is how to heat and cool the new space. Extending ductwork isn't always practical, and other heating and cooling options, such as a window unit and baseboard heating, aren't very efficient.
  • Retrofits - Converted spaces such as attic and basement areas pose similar design issues as new additions. Moreover, these spaces are traditionally difficult to keep comfortable due to the fact that warmer air always rises above cooler air. Ductless heating and cooling systems deliver zoned conditioning at each AHU, providing independent indoor environmental control in each zone.
  • Outbuildings Structures separate from the home, such as a detached garage, workshop, guest house or pool house, can be comfortably and efficiently heated and cooled with a ductless system.

Versatile Mounting Options

The indoor AHUs are available with multiple mounting options to subscribe to the aesthetics required of the interior design project. 

  • Concealed - AHUs may be concealed within the ceiling, wall and floor with only the air supply and air return grills visible. By utilizing a slim duct run, a concealed AHU is advantageous for conditioning large rooms and areas and adjoining rooms, providing ample air circulation. Concealed mounting option is also nice for rooms with hang ceilings, as the AHU is concealed above a panel.
  • Mounting - AHUs may be mounted to practically any wall, ceiling or floor surface. High wall and ceiling mountings are popular, and these installations are out of the way of foot traffic. Low wall mounting and floor consoles allow for easiest access to the air-filtration components, cabinet and components for cleaning.
  • Recessed - Mitsubishi Electric also offers AHUs which are recessed into the wall or ceiling. This serves the dual purpose of better aesthetics and accessibility.

Home Comfort Zones

Home comfort and energy efficiency go hand-in-hand with ductless heating and cooling systems. Since each AHU is independently controlled, you may heat and cool each zone as you please. For instance, if you have converted attic space to a home office, you can keep your office nice and cool on hot and stuffy summer days without running the central A/C system throughout the entire house.

If you're installing a multi-zoned ductless system, the occupants in each zone may enjoy temperatures personalized to their liking without affecting the other zones. This point-of-use heating and cooling method simultaneously delivers maximum energy efficiency and home comfort.

For more details about the advantages of ductless heating and cooling systems, contact us to connect with a Mitsubishi Electric Contractor near your home.

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