Northline installs, services and maintains furnaces, heat pumps, boilers and ductless mini-splits across Duluth — with maintenance plans and seasonal estimates booked ahead of the cold.
Furnace installation · AC & heat pumps · Ductless mini-splits · Boiler repair · Indoor air quality
The season turns fast once the lake cools
One week it's a cool breeze off the lake. The next, the ground is hard and every furnace in town wants attention at once. The first freeze is the line the season crosses — and the deadline Northline works toward all year.
Every system Northline works on sits somewhere along the same line. Here's what each one needs before the freeze, and where a maintenance plan keeps it.
A furnace sized for the house it's in, set up and running before the cold arrives. If yours is on its last season, we look at the whole picture — the ductwork, the returns, the way the house actually heats — and install something that holds.
Cooling season ends and heat pump season starts. We service the system, check the charge, and make sure it can carry the shoulder months without working twice as hard as it needs to.
For the addition, the upper floor and the finished basement the ductwork never reached. A mini-split heats and cools one zone on its own, without touching the rest of the house.
Many Duluth homes still run on radiators and a boiler. We repair what can be repaired, keep the heat moving through the system, and tell you plainly when it's time to stop.
When the windows stay shut for months, the air inside is the air you breathe. Filtration, ventilation and air quality systems matched to the size and age of the house.
The freeze line moves a little every year. A Northline maintenance plan keeps your system on the warm side of it — a yearly visit that lands ahead of the cold, and a running record of what your equipment has been doing all along.
Scheduled early in the season, not in the middle of it
A maintenance visit in an older Duluth basement, done long before the season turns.
Tell us what you're running and what it's been doing. We'll set a time, look at the system, and give you a straight answer on repair, replacement or a plan.
Serving Duluth, Minnesota