Timely Move

Calling it a "purification system" makes it $175.

Normally I replace the furnace filter every 12-15 months. However, the ash and soot from the summer wildfires prompted me to change the part last night after an interval of nine months.

That was timely, because the overnight temperatures plummeted to 40 °F, and the heat came on when the house fell to 60°. The old furnace needed $5 air filters, but its 2013 replacement requires a Climate PureAir System Annual Maintenance Kit that runs $175. The latter includes a charcoal catalyst and ultraviolet bulbs in addition to the box-shaped filter.

Though I grouse, I am happy that we had bought the UV-bulb add-on to zap COVID-19 and other nasty pathogens.

Only two months ago Foster City was sweltering in 100° heat, but it didn't stay that way.

One has to be prepared. In all aspects of life, things can turn on a dime.