DVM S Outdoor Units DVM S Indoor Units DVM S ECO Indoor Units M & P Single-zone CITY MULTI VRF - Air Source CITY MULTI VRF - Water Source CITY MULTI VRF - Indoor Units M & P - Controls CITY MULTI VRF - Controls Dedicated Outside Air Systems M-Series Heat Pump Systems Slim, wall-mounted indoor units provide zone comfort control. INVERTER-driven compressors and electronic LEV's provide higher efficiency with controlled power usage. The outdoor unit powers the indoor unit, and should a power outage occur, the system is automatically restored when power returns. Ideal for applications such as bedrooms, home offices, living rooms, dining rooms, bonus rooms, basements, kitchens, offices, kiosks, guard houses, and more. Rated capacities range from 9,000 to 18,000 Btu/h. Complete individual Zone/Room control for exceptional comfort Premium, high efficiency performance allows maximum comfort with controlled capacity and power consumption SEER Values up to 26, HSPF up to 10.5 and EER up to 15.5 INVERTER driven compressor and LEV provide high efficiency comfort while using only the energy needed to maintain maximum performance H2i - Hyper Heat Performance offers full capacity heating at 5°F (9 & 12kBTU) and 73% capacity at -13°F (18kBTU) Choice of fan speeds

: Quiet, Low, Medium, High, and Super High; Auto fan speed control also included Advanced microprocessor technology and control Equipped with standard Wireless, IR, Handheld, Remote Controller also offers optional Wireless, RFI-RedLINK™, Full Function, Wall-mount, Remote Controller - MHK1 or Wired Full Function Wall-mount Remote Controller - PAR-21MA 9,000 and 12,000 BTU Systems offer i-See® Sensor Technology and Triple Filtration for total indoor comfort Hot-start technology - no cold air rush at start-up or re-start after defrost Homeowner BrochureM-Series Contractor GuideMSZ - Documents and Accessories (LinkDrive)MUZ - Documents and Accessories (LinkDrive)You are hereHome » HomeFor homeowners, the decision between choosing a ductless mini-split system and a conventional central air conditioning system can be a difficult one. Let us compare the major differences between the two options. A ductless mini-split system has two main components—an outdoor compressor and an indoor air-handling unit.

A conduit links the outdoor unit with the indoor unit. As implied by their name, the ductless mini-split system does not require ductwork, making it the more convenient cooling option for older buildings with thick walls. It basically keeps your room temperature at a constant temperature, unlike an air conditioning unit that goes on and off throughout the day. In the winter, the system works in reverse by absorbing heat from the outside air and moving it indoors to heat your home, too. Their compact size allows for greater flexibility in temperature zoning—air conditioning is limited to the rooms in which the air handlers are located. These systems tend to run quieter than central air conditioning systems, and are easier to install. Some ductless mini-split models have the highest efficiency rating of any type of air conditioning system. Although a ductless mini-split can save you money in the long run, the initial installation cost can run high. It may be difficult to find qualified, professional installers.

Improper sizing or placement can mean that your unit runs less efficiently. best rated hvac residentialThere are also some home owners who have aesthetic issues with a wall mounted unit. maintain hvac unitA central air conditioning system treats air at a central location and distributes it to and from rooms by one or more fans and a series of ducts. ac unit is short cyclingSupply ducts and registers carry this cool air from the air conditioner to the home. The air becomes warmer as it circulates through the home; then it flows back to the central air conditioner through return ducts and registers. If your goal is to keep your whole house cool, central air conditioning is most likely your best option. With newer models, you can count on efficient, cool and comfortable temperatures and lower humidity.

The system is also virtually invisible, and it adds value to your home. As with the mini-split system, you can run into cost problems if the unit has not been properly sized. (However, the upfront cost is considerably less to just replace an existing system with a new central air system rather than with a ductless mini-split system.) To summarize, here are the main advantages and disadvantages of both systems: For more information on air conditioning systems, check out When to Replace Your Central Air Conditioning System and What Is a Ductless Mini-Split AC System?A ductless heating and cooling system is a highly efficient zonal heating and cooling system that does not require the use of air ducts. Ductless systems consist of an outdoor compressor unit and one or more indoor air-handling units, called “heads,” linked by a dedicated refrigerant line. Indoor heads are typically mounted high on a wall covering a three-inch hole where the refrigerant line passes through from the outside unit, which is mounted at the base of the house.

Each indoor head corresponds with a heating and cooling zone that can be controlled independently. Displacing an existing zonal heating systemDuctless systems are ideal for replacing or supplementing baseboard, wall and ceiling heat, wood stoves, electric furnaces and other electric plug-in space heaters, such as those using propane or kerosene. A cost-effective solution for a small electrically heated home may consist of a single-zone system serving the main area of the house, with existing electric baseboards remaining in bedrooms and bathrooms.Room additionsA ductless system can also be an ideal solution for a room added onto a house or an attic converted a to living space. Rather than extending the home’s existing ductwork or pipes, or adding electric resistance heaters, the ductless system will provide efficient heating and cooling. Please note that homes that are not primarily electrically heated may not be eligible for utility incentives; check with your electric utility for incentive eligibility requirements.

New constructionNew home designs can be adapted to take advantage of a ductless system’s many benefits. Two or more systems can be installed in various zones of the house to simplify installation and minimize refrigerant line length. Please note that homes under construction are generally not eligible for utility incentives, though complete/permitted for occupancy homes are now eligible for incentives in most utility territories; check with your electric utility for incentive eligibility requirements. Ductless heating and cooling systems are reversible, two-way heat pumps that transfer heat between outdoor and indoor air by compressing and expanding refrigerant. Using a refrigerant vapor compression cycle, like a common household refrigerator, ductless systems collect heat from outside the house and deliver it inside the house on the heating cycle, and vice versa on the cooling cycle. Ductless systems use variable speed compressors with inverter technology (AC to DC) in order to continuously match the heating/cooling load, avoiding inefficient on/off cycling of conventional electric resistance and central heating systems commonly associated with uncomfortable temperature variations and high energy consumption.

Ductless systems consist of several parts, including:An outdoor unit that contains a condensing coil, an inverter-driven variable speed compressor, an expansion valve and a fan to cool the condenser coilAn indoor unit that contains an evaporator and a quiet oscillating fan to distribute air throughout the living spaceA refrigerant line-set that is made of insulated copper tubing and is housed in a conduit alongside a power cable, and a condensation drainA remote control that can be used to set the desired temperature and program for nighttime settingsThe system is controlled via a remote control that changes temperature and operation mode. Wall-mounted and wi-fi enabled controls are also available. While a ductless system can be used as a primary heat source, homeowners are encouraged to keep their existing electric heating units as supplementary heating in case of extreme weather conditions or for use in hard-to-reach extremities of the home. Ductless systems are highly efficient, using 25 to 50 percent less energy than zonal heat types, such as baseboard, wall and ceiling heat or electric forced-air furnaces.

Three key factors account for the high efficiency of a ductless system:1. Ductless systems allow the user to control each heating and cooling zone independently, eliminating the costly overheating and over-cooling common to central air systems. You no longer need to pay to heat or cool unoccupied rooms.2. While central air systems lose as much as 30 percent of their efficiency through air leaks and conduction in the ductwork, ductless systems distribute air directly to each zone, resulting in 25 percent greater efficiency. Ductless systems use inverter-driven, variable speed compressors that allow the system to maintain constant indoor temperatures by running continuously at higher or lower speeds. Thus, the system can ramp-up or down without great losses in operating efficiency, avoiding the energy intensive on/off cycling common in electric heating systems.3. Modern ductless systems have extremely good Seasonal Energy Efficiency Ratios, or SEER, between 16 and 22, and Heating Seasonal Performance Factors, or HSPF, that range from 9 to 12 or greater.

Ductless heating and cooling systems were developed in Japan in the 1970s and have since become a preferred heating and cooling system throughout Asia and much of Europe. In the United States, ductless systems have been used in commercial applications for over 20 years. The average cost of an installed ductless system with a single indoor heating/cooling head is between $3,000 and $5,000. Additional heads and greater heating capacities will increase the cost of the system. Other factors that will affect the cost of an installed system include manufacturer and model, geographical location, refrigerant line-set length, difficulty of installation and installer rates. Many utilities in the Northwest offer customers incentives as high as $1,500 for upgrading an existing electric heating system to a ductless system. Interest-free financing may also be available. Check with your local electric utility for details.Visit our utility incentives page for a listing of incentives that may be available in your area.

Federal tax credits and additional incentivesResidential energy tax credits for high-efficiency heating, cooling and water heating equipment may be available for qualified equipment. For more information and for a list of qualified ductless systems, visit the ENERGY STAR® website.MontanaThe Montana Energy Conservation Installation Credit provides a tax credit for 25 percent of the cost of a ductless heating and cooling system, with a maximum credit of $500 per individual and up to $1,000 for a married couple filing jointly.OregonEffective January 1, 2013, qualified equipment is eligible for a $350 to $1,500 tax credit from the Oregon Department of Energy. To review qualified equipment and incentives for ductless systems, visit the Oregon Department of Energy’s website.Additional resourcesVisit the Database of State Incentives for Renewables & Efficiency for a comprehensive list of incentives that support energy efficiency in the United States. With proper maintenance and care, a ductless system should perform for over 20 years.

Many of the systems installed during the 1980s are still functioning well today. Check manufacturer guidelines for proper maintenance of your system or reference our Ductless Homeowner’s Guide. Ductless systems require basic maintenance to ensure optimum performance, though periodic professional servicing of your system is recommended. In most cases, ductless system maintenance is limited to keeping filters and coils clean, and these tasks can easily be performed by the homeowner. For more information, download our Ductless Homeowner’s Guide or refer to the manufacturer’s maintenance guidelines for your system. Ductless systems are sized to meet the heating and cooling needs of a home’s individual zones. There is a great deal of flexibility when it comes to system sizing as one indoor unit can provide between ¾ and 2½ tons of heating and cooling depending on its BTU capacity rating. Some common capacities for indoor units are 9k, 12k 18k, 24k, and 30k BTU. Outdoor units are sized to meet the combined load of all heating and cooling zones.