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Mitsubishi Mr. Slim Heat Pump

Ready to ditch your old air conditioner and furnace and install a revolutionary new heating and cooling system in your home? The Mitsubishi Mr. Slim heat pump is what you need! This highly efficient, ductless Mitsubishi heat pump can deliver conditioned air all throughout your home – using less energy than a 40 watt light bulb!

What’s so great about the Mitsubishi Mr. Slim heat pump?

No more hot and cold spots – if you use window air conditioning units or even a ducted HVAC system, you could end up with places that your system just can’t reach, leaving you with the occasional hot or cold spots that can make your home’s temperature feel uneven and uncomfortable. Well with the Mitsubishi Mr. Slim heat pump, all these problems are eliminated! The Mr. Slim heat pump mounts high on the wall and blows warm or cool air to all four corners of the room, evenly heating or cooling it to keep you perfectly comfortable no matter where you go.

Barely noticeable – unlike your ducted air registers (or worse, those huge clunky window AC units), the Mitsubishi Mr. Slim heat pumps are designed to blend into the background of your home – most of the time you’ll forget they’re even there! The indoor units of the Mitsubishi mount high up on the wall, out of sight. Best of all, the units are quieter than a whisper!

Incredibly easy to install – because there is no ductwork involved, Mitsubishi Mr. Slim heat pump installation takes just a few hours and is minimally invasive. Instead of the sometimes heavy demolition work involved in installing a typical ducted system, this Mitsubishi heat pump requires just a three inch hole in the wall that you won’t even be able to see. As an added bonus, no ducts means no allergens blowing through your home!

Ultimate comfort technology – conventional air conditioners and furnaces use thermostats to keep the temperature under control. This leads to cycles where your HVAC unit is either fully on or fully off – with no in between. The Mitsubishi Mr. Slim heat pump system uses patented, advanced Inverter technology which runs the fan at a low level to constantly circulate the air through your rooms. At the same time, the indoor and outdoor units of your Mitsubishi heat pump talk to each other to keep the temperature constant and fully comfortable at all times, eliminating temperature swings based on weather changes and sun movements. And changing the temperature couldn’t be easier – just grab the remote and adjust it up and down!

Call Michael Bonsby for Heat Pump and HVAC Services

If you have been thinking about installing a new furnace or air conditioner in your Maryland or Washington, DC home, take a close look at the Mitsubishi Mr. Slim heat pump! Michael Bonsby HVAC, Plumbing & Electrical is one of the few Mitsubishi heat pump suppliers in the Maryland and Washington, DC area – we can answer any questions you have about the Mitsubishi heat pumps or install a Mitsubishi heat pump in Maryland or DC today!

Heat Pump FAQs

What is a Mr. Slim heat pump?

A Mr. Slim heat pump is a compact, high-efficiency heating and cooling system that uses refrigerant to transfer heat between indoor and outdoor units. It can provide both heating and cooling, and is available in ductless or duct-friendly configurations for flexible home comfort.


How does the Mr. Slim system work?

The system works by using an outdoor unit connected to one or more indoor units. In heating mode it extracts heat from the outside air and moves it indoors; in cooling mode it reverses the process. Because it uses inverter-driven compressor technology, the system modulates output rather than switching on/off fully, improving efficiency and comfort.


What are the key benefits of choosing a Mr. Slim system?

Some of the main benefits include:

  • Energy efficiency due to inverter technology and variable compressor speed.

  • Quiet operation — indoor sound levels can be very low in appropriate installations.

  • Flexibility to serve single zones or multiple zones (rooms) with one outdoor unit.

  • Capability to operate in relatively cold outdoor climates (depending on model).

  • Useful choice for homes without extensive ductwork or when adding rooms or zones.


What should I consider before installing a Mr. Slim heat pump?

When considering installation you’ll want to think about:

  • Proper sizing for your home or zone, to ensure the unit isn’t oversized — which can reduce efficiency.

  • Whether you need single-zone (one indoor unit) or multi-zone (several indoor units) configuration.

  • The indoor unit style (wall-mount, floor-mount, cassette/ceiling-concealed) that fits your space.

  • Ensuring correct installation by a certified HVAC contractor, especially for refrigerant line setup and outdoor unit placement.

  • Local climate conditions — check that the chosen model has the appropriate heating capacity in low-temperature conditions.


How does the Mr. Slim system compare to a traditional furnace or central HVAC system?

A Mr. Slim system offers advantages over traditional systems in many cases:

  • Unlike a furnace, a heat pump provides both heating and cooling in one system.

  • Because it can be ductless (or minimally ducted), it’s often less invasive to install in homes without existing ductwork.

  • With inverter technology, it tends to run more continuously at partial load rather than cycling fully on and off, which can improve comfort and reduce wear.

  • It may have a higher upfront cost than a simple furnace or central air system, but savings in operating cost and greater flexibility in zoning can make it cost-effective over time.

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