Ductless Heat Pumps vs Ducted Heat Pumps

Choosing the right heat pump often comes down to one key question: do you have, or want ductwork?

Both ductless and ducted heat pump systems are similar in terms of how they operate. To provide heat to your indoor spaces, both systems absorb heating energy from outside and transfer the heat to indoor air. During cooling operation, the process is reversed. Heat and humidity are absorbed from indoor air and that heat is released outside.

The big difference comes with the delivery of heated or cooled air. With ducted HVAC systems, a central air handler or furnace circulates the conditioned air throughout the home. It uses a strong fan, usually called a blower, to push the air through ductwork that runs under floors, above ceilings or behind walls and out into your living areas. These types of systems are similar to central air conditioning and can heat or cool an entire house.

A ductless system is an excellent solution for adding comfort to older homes and room additions because they can provide comfort without requiring new duct runs. Ductless systems do require a direct connection between the indoor and outdoor units for both refrigerant tubing and electrical wiring. However, these connections are much less intrusive and less costly than installing new ductwork. 

Ductless Solutions: Delivering Personalized Comfort

Ductless systems can be configured with either one or multiple indoor units powered by a single exterior compressor. The versatility of ductless systems make them perfect for many applications, including room additions, sunrooms, garages, and they are an ideal air conditioning option for older homes. Viessmann offers two ductless heat pump solutions, single zone and multi zone.  Below we will explore their individual differences and advantages.

As the name suggests, ductless mini split each pumps provide comfort without using traditional ductwork, oculus heat pumps provide more targeted heating and cooling comfort because he did or cold air blow directly out of the indoor then coil unit into the living space. If comfort is needed in multiple zones, an additional indoor unit can be installed anywhere heating and cooling is needed.

Inverter Technology that Adapts to Your Climate

Viessmann ductless systems use inverter technology which continually adjusts the compressor speed as conditions change for consistent comfort with lower energy usage.

Single Zone

Ductless heat pumps can be configured so that one indoor unit is paired with one outdoor unit. The interconnecting line set between the indoor and outdoor units carries refrigerant and power to the indoor unit and requires only a small wall penetration, allowing installation with minimal impact on the building structure and interior.

A single zone ductless system is designed to condition one room or a defined area of a home or business. This configuration is is often selected when precise temperature control is required in a specific space with recurring comfort issues, such as a bedroom that is consistently too hot or cold. Similarly, a dedicated ductless air conditioner serving a sunroom can effectively convert it into a comfortable, usable space across all seasons.

Viessmann offers a range of outdoor units, with capacities from 6,000 to 58,000 BTU, providing heating solutions for both small and large spaces. Learn more about Viessmann's single zone ductless heat pump, the Vitocal 100-S.

Multi Zone

Ductless Multi zone systems leverage one outdoor unit that can support multiple indoor units, each controlled independently via wireless remote. This provides a high degree of flexibility in how zones are configured and managed. In addition, there is the option to add indoor units later (within the maximum connectable capacity of the outdoor unit), which simplifies staged upgrades, expansions, or renovations as project scope and budget evolve. 

Viessmann’s ductless multi-zone outdoor units, available in capacities from 18,000 to 48,000 BTU, are designed to provide reliable, efficient heating and cooling for multiple zones, or in many cases, an entire home or business. Each room, or zone, is equipped with its own indoor unit. Up to six indoor units can be connected to a single multi-zone outdoor heat pump, with a minimum of two indoor units required. This arrangement delivers individualized comfort control for each zone while consolidating outdoor equipment for a cleaner, more efficient installation. Learn more about Viessmann's Vitocal 200-S.

See What Ductless Can do for You

From garage workshops and attic studios to sunroom add-ons and more, Viessmann ductless solutions deliver unparalleled performance and fuss-free installation—so you can transform any space with ease. With their efficient inverter and flexible installation options, Viessmann ductless systems are the ideal choice for a variety of applications, including remodels, expansions and older, more historic homes.

Ductless systems can work alongside your existing air conditioner, heating, or heat pump system. These systems can help you save on your utility bills with ENERGY STAR® qualified systems and by actively heating and cooling only the areas that are occupied. You can even pick a system specifically to minimise your energy use by finding its seasonal energy efficiency ratio -SEER rating lets you know how much energy your system will use over the course of the year. Plus, there’s no risk of energy losses from leaky ductwork. 

Ductless heat pumps, or mini-splits, like Viessmann's Vitocal 100-S and Vitocal 200-S stand out as a powerful and flexible HVAC solution, offering a path to modern comfort where traditional ducted systems may be impractical or costly, such as in renovations, room additions, or older homes. By providing heating and cooling directly to individual zones, these systems eliminate the significant energy loss associated with leaky ductwork, leading to personalized temperature control and excellent energy savings year-round. 

Looking to upgrade your existing ducted space? Keep reading! Checkout the Vitocal 100-S ducted single zone heat pump solution combining inverter technology and traditional HVAC. 

The Vitocal 100-S Ducted Difference

For homeowners who already have a forced-air heating and cooling system, a ducted heat pump can be one of the most practical and cost-effective upgrade options. Viessmann offers model sizes from 18,000 to 60,000 BTU to accommodate a wide variety of applications. Unlike ductless systems that require individual indoor units in different rooms, a ducted heat pump uses existing ductwork to deliver consistent heating and cooling throughout the entire home from a single, centralized system.

One of the biggest advantages of a ducted heat pump is its ability to leverage existing HVAC infrastructure. Systems such as the Vitocal 100-S ducted heat pump are designed to work with existing ductwork, HVAC line sets, air handlers, and even furnaces, helping homeowners avoid the disruption and expense of extensive renovations. Rather than opening walls or replacing large portions of an HVAC system, many installations can be completed using the home's current setup, resulting in a faster, cleaner, and more cost-effective upgrade. This makes ducted heat pumps an attractive option for both retrofit projects and new home construction where whole-home comfort is a priority.

Ducted heat pumps also offer exceptional flexibility when it comes to home heating strategies. Homeowners can choose to retain their existing furnace and operate the system as a dual-fuel solution, using the heat pump for efficient heating during milder weather and the furnace during extreme cold. Alternatively, homeowners looking to reduce their reliance on fossil fuels can transition to an all-electric heating and cooling system. This adaptability allows a ducted heat pump to meet a wide range of comfort, energy-efficiency, and sustainability goals while providing year-round climate control from a familiar central-air distribution system.