DUCTLESS MINI-SPLIT HEATING & COOLING

Ductless Mini-Split Installation in Plymouth & the West Metro

Brass Tacks Plumbing, Heating & Cooling installs ductless mini-split heat pumps in Plymouth, MN and throughout the Twin Cities West Metro. A mini-split heats and cools a room or zone without ductwork, which makes it a good fit for additions, finished basements, homes with boiler heat and rooms that never stay comfortable.

We’ll look at the space, size the system correctly and give you an upfront price before any work begins.

White wall-mounted ductless mini-split indoor unit high on a living room wall near a window
When it makes sense

Where a Ductless Mini-Split Fits Best

A ductless mini-split is a heat pump with an outdoor unit and one or more indoor units on the wall, ceiling or floor. Because it needs no ductwork, it solves heating and cooling problems that a central system can't reach easily.

Homes without ductwork

Homes heated by a boiler, radiant heat or space heaters can add efficient cooling and heating without installing ducts. The U.S. Department of Energy lists these retrofits as a good use for mini-splits.

Additions and finished spaces

A new addition, finished basement, attic room or garage space where extending ductwork isn't practical can get its own indoor unit and thermostat.

Rooms that are always too hot or cold

A bonus room over the garage or a sunroom that never matches the rest of the house can be zoned on its own, so you are not overheating or overcooling the whole home to fix one room.

Very efficient homes

Tight, well-insulated newer homes that only need a small heating and cooling system are another good fit, according to the DOE.

Source: U.S. DOE, Ductless Mini-Split Heat Pumps

How it works

What Happens During a Mini-Split Installation

Most of the work is planning: the right size, the right indoor unit locations and a clean route for the line set and drain.

01

Look at the space

We measure the rooms, look at windows, insulation and sun exposure, and talk about how you use the space. An oversized or poorly placed unit short-cycles and wastes energy, so sizing comes first.

02

Choose indoor units

Indoor units come in wall-mounted, ceiling and floor-standing styles. Many systems can connect up to four indoor units to one outdoor unit, each with its own thermostat.

03

Run the line set

A conduit carries power, refrigerant lines and the condensate drain between the units. It usually needs only a three-inch hole through the wall, and the outdoor unit can sit up to 50 feet from the indoor unit.

04

Drain, start up and set controls

Condensate has to drain outdoors. We start the system, check it is running correctly and set up the controls, including optional Wi-Fi control.

Source: U.S. DOE, Ductless Mini-Split Heat Pumps

Mini-split services

Ductless Heating & Cooling Options

We'll recommend the simplest system that solves the problem, and we'll tell you if a ducted option makes more sense for your home.

Single-zone systems

One outdoor unit and one indoor unit for a single room or open area, like an addition, bonus room or finished basement.

Multi-zone systems

One outdoor unit serving several indoor units, so different rooms can be set to different temperatures.

Wi-Fi control

A Wi-Fi module lets you adjust and monitor the system from your phone.

Dehumidification

A dehumidifier can be added to the mini-split system to help control indoor humidity.

The numbers

Mini-Split Efficiency at a Glance

Mini-splits avoid the energy lost in ductwork, which is one of the main reasons they can be efficient.

No duct losses

The U.S. Department of Energy says duct losses can account for more than 30% of energy use for heating and cooling, especially when ducts run through unconditioned spaces. Mini-splits have no ducts.

High efficiency ratings

According to the DOE, ductless mini-splits are rated from 15.2 to 35 SEER2, compared with 15.2 to 25 SEER2 for ducted heat pumps.

Up to four zones per outdoor unit

Many models support up to four indoor units on one outdoor unit, each with its own thermostat.

The trade-offs

Installation can cost more up front than some other systems, some people don't like the look of the indoor units, and the condensate needs a drain to the outdoors. We go over all of this before you decide.

Source: U.S. DOE, Ductless Mini-Split Heat Pumps

Financing available

Pay Over Time

Brass Tacks offers financing through GreenSky, so you can add heating and cooling now and pay over time with approved credit. Financing is subject to credit approval and terms offered by participating lenders.

Common Questions

Ductless Mini-Split FAQs

A ductless mini-split is a heat pump with two main parts: an outdoor compressor and one or more indoor air handlers. A small conduit connects them and carries power, refrigerant lines and a condensate drain. It heats and cools without ductwork.
Cold-climate mini-split heat pumps are designed to keep heating at low outdoor temperatures, and standard models lose heating capacity as it gets colder. Many West Metro homes keep a furnace, boiler or other backup heat for the coldest days. We'll recommend a model rated for our climate and explain how it fits with the heat you already have.
Many models support up to four indoor units connected to one outdoor unit, according to the U.S. Department of Energy. Each indoor unit has its own thermostat, so each room or zone can be set separately.
The DOE lists homes without ductwork (like homes heated by a boiler, radiant heat or space heaters), room additions where extending ductwork isn't practical, and very efficient new homes as good fits. They also work well for a single room that is always too hot or too cold.
Usually only a three-inch hole through the wall for the conduit, according to the U.S. Department of Energy. The outdoor unit can be placed up to 50 feet from the indoor unit, which gives some flexibility in where each one goes.
They can be. The DOE says duct losses can account for more than 30% of heating and cooling energy use, and mini-splits have no ducts. Ductless mini-splits are rated from 15.2 to 35 SEER2, compared with 15.2 to 25 SEER2 for ducted heat pumps.
An oversized or poorly placed indoor unit can short-cycle, turning on and off too often. That wastes energy and makes temperature and humidity harder to control. That is why we look at the room size, windows and insulation before recommending a unit.
Yes, with a Wi-Fi module. It lets you change settings and check the system from your phone. We can include one with a new installation.
Mini-splits remove moisture from the air while cooling, and that condensate has to drain to the outdoors. The drain line runs through the same conduit as the refrigerant lines.
Yes. We offer financing through GreenSky for many heating and cooling projects. Financing is subject to credit approval and the terms offered by participating lenders. See our financing page for details.
Ductless heating & cooling

Thinking About a Mini-Split?

Tell us about the room or the home you want to heat and cool. We'll look at the space, explain your options honestly and give you an upfront price before any work begins.