Ductless Mini Split Systems: Advantages and Disadvantages

What Are Mini-Split Heat Pumps?

Also known as wall systems, mini-split heat pumps can cool and heat the air in a room or a series of rooms primarily by blowing cold/hot air into the space using outdoor air.

A ductless mini-split system works to provide cooling and heating to a single room or a much larger area of a home, even up to entire residences. However, it is sometimes necessary to opt for a multi-zone heat pump if a home has multiple zones or floors to heat and cool.

It is one of the preferred choices of homeowners and builders due to its many advantages over other types of air conditioning and heating.

One of the biggest advantages of ductless mini-split systems is their high efficiency for cooling and heating, notably with SEER ratings higher than those of other types of systems.

The small size of the units allows greater flexibility for heating and cooling individual rooms and does not require much indoor wall space for installation. It is the ideal option for cooling and heating homes where ducts are not already available and are difficult to install.

The flexibility of mini-split heat pumps is also demonstrated by the freedom to place the outdoor compressor farther from the indoor unit. The compressor does not necessarily have to be on the other side of the wall where the indoor unit is placed (unlike PTACs or window air conditioners). Finally, the outdoor pipes can be discreetly covered with metal casings to look more like outdoor drainage pipes.

Mini-split heat pumps consist of an indoor wall component as well as an outdoor component called the compressor. The indoor and outdoor parts are connected by two small refrigerant pipes and electrical cables.

This type of system requires neither a slot to be integrated into the wall nor as much space as window air conditioners typically require. They can heat and cool a series of rooms with relatively low installation costs. They are also a much more aesthetic solution to homeowners' heating and cooling needs. Mini-split systems therefore represent a cost-effective and efficient solution to create a much more comfortable and productive environment for living and working. For these reasons, among others, wall heat pumps are extremely popular among homeowners and real estate developers.

Heat Pumps vs Air Conditioners

Although they look identical to simple air conditioners, heat pumps use reverse cycle splitting technology to enable a heating mode. In cooling mode, the mini split blows cold air inside and draws warm air outside. In heating mode, it works in reverse and extracts heat from the outdoor air to send it inside. In Quebec in particular, a heat pump is therefore a much more cost-effective option to meet both heating and cooling needs for year-round comfort. Especially since heat pumps do not cost much more and are subsidized by various provincial and federal programs. So in the end, it is more economical to choose the heat pump instead of air conditioning only.

Multi-Zone Systems (Multi-Split)

A multi-zone wall system is not very different from a standard single-zone wall heat pump. It has the capacity to cool and heat multiple zones and rooms in a large residence. This is achieved by pairing several indoor units to one outdoor compressor.

This option is often ideal when the physical layout of a home does not allow air to circulate effectively and evenly to all parts of a house, for example when there are multiple large floors to supply. Each indoor unit can be controlled independently and even set to different temperatures.

Advantages of a Mini-Split System:

• Affordable installation costs compared to other types of systems
• Simple and quick installation
• Wide range of energy-efficient models
• Relatively quiet operation
• Low operating costs
• Aesthetic benefits: simple and elegant solution
• Cost-effective supply of heating and air conditioning

Disadvantages of a Mini-Split System:

• Some multi-story apartments can make connecting the compressor to the indoor units or electrical panel too complicated, but such cases are rare. Our technicians can usually find and suggest an ideal solution even in complex homes.
• In case of a breakdown, it is difficult to find a company in Greater Montreal to handle the repair. That is why we suggest all our clients opt for a 10-year extended labor warranty! Ultimately, it always costs less.

AirGreen Heat Pumps, Air Conditioning & Heating offers free phone consultations and 100% free on-site estimates! Contact us directly to see our prices and receive your personalized quote in less than 24 hours!