Mini Split Installation in San Rafael, CA
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San Rafael asks for heat far more than cooling
A mini-split here runs nine months a year, October through June, mostly in heat mode. Winter nights average 43°F, which is mild compared to most of the country, but it's still enough hours of runtime that the heat pump side of the system does most of the work over a year. Summer afternoons average 71°F, so the cooling side barely gets used.
Any mini-split installed new has to clear the federal minimum for split-system heat pumps, 14.3 SEER2 for cooling and 7.5 HSPF2 for heating. In a climate that leans this hard on heating, the HSPF2 number matters more here than the cooling rating does.
- 9 months
- October through June, your system heats
- 43°F
- the average winter night it heats against
- 71°F
- the average summer afternoon it cools against
California requires HVAC contractors to hold a state license.
The license is issued to the contractor, not to the job, so it covers the business doing the work, not this particular installation. It means the state has tested this contractor and keeps a record of them, one that follows from job to job rather than starting over each time.
For a mini-split installation, that license is the thing standing behind the work. Alongside it, most cities and counties here require a permit from the local building office, with an inspection once the installation is done, so someone outside the contractor checks the work as well.
Sources: California Legislative Counsel · Contractors State License Board
- Is a mini split worth it?
- For a lot of San Rafael homes, yes. Your winters here run cool but not brutal, averaging 43°F on winter nights, and a mini split heat pump handles that range well without strain. Summers stay mild too, so the same unit covers both jobs instead of running separate heating and cooling systems. If you're heating with gas now and want one system that does both, a mini split is worth pricing out.
- How many rooms can a mini split cover?
- A single outdoor unit can run several indoor heads, so one system can cover multiple rooms at once. Each indoor head is sized for the room it serves, so a contractor will look at the square footage and layout of your home before deciding how many heads you need and where they go. More rooms means a larger outdoor unit and more line sets, so this is worth having sized for your specific house rather than guessed at.
- Can a mini split heat a whole house?
- Yes, if it's sized and placed for that from the start. A whole-home setup uses a multi-zone outdoor unit with an indoor head in each main room, and every head can run at a different temperature. Since your home needs heat from October through June, the system has to be sized for your coldest nights, not just an average day, so a contractor will size it around your specific home rather than a rule of thumb.