Mini Split Installation in McMinnville, OR
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McMinnville asks a mini-split to run nine months a year
October through June, your mini-split is the thing keeping the house warm. Winter nights average 35°F here, which is mild compared to a lot of the country, but that also means the unit spends most of the year in heating mode, not cooling. Summer afternoons average 77°F, so cooling barely factors into the job it has to do.
A new unit installed now has to meet the federal minimum for split-system heat pumps, 14.3 SEER2 for cooling and 7.5 HSPF2 for heating. Given how much more heating this climate asks for than cooling, the HSPF2 number matters more here than the cooling rating does.
- 9 months
- October through June, your system heats
- 35°F
- the average winter night it heats against
- 77°F
- the average summer afternoon it cools against
Oregon requires HVAC contractors to hold a state license.
The Construction Contractors Board licenses the contractor, not the specific job, so the license on file covers the company doing the work in general rather than this installation in particular. Work under $1,000 falls outside that requirement, but a mini-split installation runs well past that threshold.
In most cities and counties, installing a mini-split needs a permit from the local building office, with an inspection once the work is finished. That inspection checks the installation itself, separate from whatever the contractor's license already covers.
Source: Oregon Legislative Assembly
- Is a mini split worth it?
- For a house here, yes, since heat is needed October through June and a mini split handles both heating and cooling from the same unit. It works as a heat pump, pulling heat into the house on cold nights and moving it back out in summer. Winter lows average 35°F here, well within the range these units are built to handle. A contractor can size and place one for the rooms you need covered.
- How many rooms can a mini split cover?
- A single outdoor unit can run one indoor head or several, so the number of rooms depends on the system, not the technology. A single-zone setup covers one room or an open area well. A multi-zone setup ties several indoor heads to one outdoor unit, with each head running its own room independently. A contractor will look at the layout of the house to say how many zones make sense.
- Can a mini split heat a whole house?
- It can, if enough indoor heads are placed to reach every room, but a single head heats the space it's in and what's open to it. A multi-zone system with a head in each main room can cover a whole house. Closed doors and separate levels cut off airflow, so a contractor needs to walk the house to plan where each head goes. Given that heat is needed here nine months a year, getting the zoning right matters more than it would somewhere milder.