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Wintertime Energy Savings Is Still Possible, Even With a Ductless System

It has been a long harsh winter season for most of the country, which can strain the energy budget and the efficiency of your home system. If you use a single- or multi-zoned ductless system for space heating and cooling, you can enjoy wintertime energy savings, greater comfort, and boost the performance of your system with these top home-efficiency suggestions. These ideas can help you save money and improve comfort for the balance of this heating season and far into the future.

Check the Air Filter

Mitsubishi Electric ductless systems offer sophisticated air filtering technology that removes or eliminates a host of allergens, viruses, bacteria and odors. This multi-phase filtration system keeps harmful contaminants out of the living spaces. The filters also protect components in the air handler, such as the coil and condensate drainage, which are susceptible to accumulating contaminants such as mold, mildew and debris that hinder performance and create odors.

Check the air filters of ductless systems regularly, as well as filters in a conventional whole-house system, if one is installed. A dirty filter restricts airflow, making the fan work harder to pull air across the coil.

Hot Water Wintertime Energy Savings

Hot water storage heaters are essentially on all the time – heating and re-heating stored water for household use. Since water heating accounts for about 15 percent of the typical household’s energy bill, use these hot water wintertime (and any time) energy saving tips:

  • If the thermostat is set above 120 degrees, lower it to 120. If your storage tank has two thermostats, set the top thermostat to 120 degrees and the bottom thermostat to 115 to 117 degrees.
  • Feel the storage tank. If it's warm, the tank is transferring costly heat energy through the sides and top. Consider insulating the storage tank with blanket insulation (slip over) or jacket insulation (wrap around) sized to your tank model.
  • Wrap the inlet and outlet pipes to the tank with fiberglass insulation wrap.
  • Place an insulation board beneath the tank (for electric tanks) to prevent heat transfer to the floor.

Sealing Air Leaks

If you have an air leak in your car’s tire, you want to seal it, right? Or else, you'll have to keep re-filling the tire with air, and you'll lose fuel efficiency and have to refill gas more often. If your home is leaky, your ductless system and other installed systems must work harder to heat and cool the air more often, which is not cheap. Use these tips to seal your home:

  • Weatherstripping – Entry doors and other access doors are prone to allowing air exchange around the perimeter and beneath the door. Install weatherstripping around door perimeters, and install draft blockers at the bottom.
  • Caulk – Air leaks are common around window frames and at contact points and hinges. Caulks come in a variety of colors to help match the interior of windows for better aesthetics. Check the exterior wall of your home for gaps around wiring, cables and pipes. Use caulk or expandable spray sealant to seal up those leaks.
  • Attic door – Pay special attention to the attic door or access hatch. Heat rises and will find a way inside the attic through the tiniest holes and gaps. Use weatherstripping around the perimeter and use fiberglass insulation batts for the back of the door.

Insulation Inspection

Insulation is necessary to prevent the transfer of heat energy from the living spaces to unconditioned spaces in the home, such as the attic, crawl space and exterior walls. Most homes in the U.S. should insulate attic space up to R-60, according to

Insulation can be tricky (and itchy) in every phase, including measuring current amounts, detecting deficiencies and installing new insulation or adding more. Work closely with your Mitsubishi Electric Contractor to seal and button up your home for substantial wintertime energy savings.

Around the Home

There are many other ways around the home to achieve wintertime energy savings. Use this checklist to see where your home efficiency stands:

  • Have you scheduled HVAC maintenance recently?
  • Do you use power strips for electronics, such as DVD players, cell phone chargers, computer equipment and stereos? Do you turn these strips off when electronics are not in use?
  • Do you use power strips for small appliances, such as microwaves and toasters?
  • Have you insulated all hot water pipes in your home?
  • Have you installed low-flow aerators on all water outlets?
  • Are your comfort systems and appliances Energy Star certified?

If you would like to ask us questions about these tips for wintertime energy savings, please give us a call or visit our website to speak with a Mitsubishi Electric Contractor in your region of the U.S.

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