Mini Split Installation in Troy, MI
A new system here will heat from October through May and cool from June through August every year. Tell us about the house, and a licensed contractor who covers Oakland County will get in touch.
Tell us about the job
It takes about a minute.
What Troy winters ask of a mini-split
Troy needs heat eight months a year, October through May, with winter nights averaging 19°F. A mini-split has to hold a room's temperature through that whole stretch, not just take the edge off a cool evening. Summer only asks three months of it, with afternoons around 80°F, so the heating side of the job is the bigger one here.
Any mini-split installed new has to clear the federal minimum for a split-system heat pump, 14.3 SEER2 for cooling and 7.5 HSPF2 for heating. That floor applies whether the room already has ductwork or none at all, since a mini-split is a split system either way under the standard.
- 8 months
- October through May, your system heats
- 3 months
- June through August, it cools
- 19°F
- the average winter night it heats against
- 80°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Michigan requires HVAC contractors to hold a state license.
The license comes from the Board of Mechanical Rules. It covers the contractor, not the job itself. It is not tied to the mini-split going in at your house. It belongs to the business doing the work, and it stays with them from one job to the next.
Because Michigan licenses the contractor, that license is what stands behind the work here. The installation itself will still need a permit from your local building office in most cities and counties. An inspection follows once the work is done. That inspection checks the physical job. The license is what backs the contractor doing it.
Sources: Michigan Legislature · Michigan Department of Licensing and Regulatory Affairs
- Is a mini split worth it?
- For the right space, yes. A mini split heats and cools without ductwork, so it works well for a room addition, a garage, or a house that relies on window units and space heaters now. Troy sees winter lows around 19°F, and cold-climate mini splits are built to keep producing heat down into that range, which is worth checking when a contractor sizes the unit. Whether it makes sense for your whole house depends on how it's built now, and that's a question for the contractor doing the install.
- How many rooms can a mini split cover?
- A single outdoor unit can run one indoor head or several, up to eight on most multi-zone systems. Each indoor head handles one room or one open area, so the number of rooms you can cover comes down to how many heads the outdoor unit supports and how much capacity each room needs. A contractor works this out by measuring the rooms and checking the heat loss for each one, not by a fixed rule.
- Can a mini split heat a whole house?
- It can, if there are enough indoor heads placed to cover every room, or a central ducted heat pump instead of individual heads. Troy homes need heat from October through May, eight months a year, so whatever system goes in has to hold up through real cold, including nights near 19°F. Most furnaces here run on gas, so switching a whole house to mini splits is a bigger change than adding one to a single room. A contractor can look at the house and lay out what full coverage would take.