Mini Split Installation in Vancouver, WA
A new system here will heat from October through June and cool from August through August every year. Tell us about the house, and a licensed contractor who covers Clark County will get in touch.
Tell us about the job
It takes about a minute.
Nine months of heat, one month of cooling
Clark County asks a mini-split to work as a heater more than anything else. Winter nights average 35°F from December through February, and homes here need heat from October through June. That is nine months of the year the heat pump side is doing the job, with just August calling for cooling.
A mini-split installed here has to be sized for that long heating stretch, not just the mild summer afternoons that average 77°F. Any unit manufactured from 2023 on has to meet 14.3 SEER2 for cooling and 7.5 HSPF2 for heating, but where it lands above that minimum matters more for a system that spends most of its year heating than cooling.
- 9 months
- October through June, your system heats
- 1 months
- August through August, it cools
- 35°F
- the average winter night it heats against
- 77°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Washington requires contractors to register with the state.
Registration means the contractor's business is on file with the Department of Labor and Industries. There is no trade exam behind it and no state license. It tells you the business exists and is on record, not that anyone checked the contractor's work.
Since Washington doesn't test or license for this trade, what actually gets checked here happens at the local level. In most cities and counties, installing a mini-split needs a permit from the local building office, along with an inspection once the work is done. That inspection is what confirms the unit was installed correctly, since the state registration does not cover that.
Source: Washington State Legislature
- Is a mini split worth it?
- For most homes here, yes, since you're running heat or cooling ten months of the year. A mini split handles both from one unit, and it keeps working room by room instead of forcing you to condition the whole house at once. With winter lows averaging 35°F, look for a cold-climate model so it keeps up on the coldest nights, and a contractor can confirm which unit fits your house.
- How many rooms can a mini split cover?
- A single outdoor unit can run one indoor head or several, depending on the system. Single-zone systems cover one room. Multi-zone systems run several indoor heads off one outdoor unit, each with its own thermostat, so you can cover more rooms without adding more outdoor equipment. How many rooms yours should cover depends on the size and layout of the house, which a contractor will work out room by room.
- Can a mini split heat a whole house?
- It can, if enough indoor heads are placed to reach every room you want heated. A single head in one room heats that room, not the house around it. Whole-house coverage means either a multi-zone system with a head in each main area, or ducted mini-split air handlers sized to the house. Given homes here need heat from October through June, sizing this correctly matters more than it would somewhere with a short winter, so have a contractor work out the layout before you decide on equipment.