Deer Park Furnace & Air LLC.

Washington lists the business under a single trade, HVAC, which covers furnaces, air conditioning and refrigeration equipment. The state names Larry Haines and Diane Haines as principals since 2012, the year the business was established, and Richard Haines as a principal since 2016. That's a family name running through more than a decade of state records. For a homeowner in an existing house who wants a furnace serviced or a cooling system looked after by the same small local shop year after year, that kind of continuity matters more than reach. Heating and cooling demand around Spokane follows the weather. The first cold snap in fall brings a rush of no-heat calls and furnace startups, and the first hot stretch of summer does the same for air conditioning. Small shops fill up fast in both windows. The easier route is to book furnace maintenance in late summer or early fall and AC checks in spring, before the calls pile up. Replacement work goes smoother when it's planned in the shoulder seasons too, while there's still time to compare equipment and the old system is still running.