What is the difference between a ductless mini-split and ducted heat pump system?
Ductless Mini-Split Systems
Often referred to interchangeably as Ductless Heat Pumps, Ductless Mini-Split Systems use an outdoor unit connected to one or more indoor units via refrigerant lines, allowing for individually controlled heating and cooling throughout your home.
Ducted Heat Pumps
Ducted Heat Pumps on the other hand use a central unit to heat or cool air, which is then distributed throughout the home via a network of ducts.
What makes each system shine?
Ductless Heat Pumps
Ductless
Avoid energy loss caused by leaky ductwork, heat traveling through cold spaces, or the extra energy needed to push warm air through long ducts.
Flexible installation
Can easily be installed in various locations.
Zoned control
Allows for customized temperature control in different rooms.
Air Quality
Improved air quality with multi-stage air filtration.
Ducted Heat Pumps
Whole house heating/cooling
Can provide consistent temperature control throughout the entire house.
Aesthetically pleasing
Ducts are hidden.
Considerations before you decide
Ductless Heat Pumps
Aesthetics
Indoor units can be noticeable.
Retro fit
Existing homes often require the refrigerant lines run on the outside of the house in a line hide, which can be painted.
Furnace replacement
It can be challenging to replace the whole home heating in some rooms.
Ducted Heat Pumps
Energy loss
Air and heat energy can leak through the ductwork, causing up to 30% loss of efficiency.
Installation
Can be costly and invasive, especially if ductwork needs to be installed or repaired.
Less flexible
Individual climate control is not possible - the entire home is either heated or not heated all at once.
Bacteria and mold growth
Dust, moisture, and mold can accumulate over time if not properly maintained, leading to air contamination.
Rodent and pest issues
Can attract rodents, insects, or other pests that may nest inside, contaminating the air and requiring costly cleaning or repairs.
How much will each cost you?
Ductless Heat Pumps
Installation ranges between $4,000–$8,000 per unit. Incentives can reduce this cost significantly.*
*IDHP internal reporting, 2025
Ducted Heat Pumps
Installation ranges between $10,000–$40,000, or more if you don’t have existing ductwork.*
