3 ms·
It depends on the box fan and your electricity prices. When I did the math for me, the break even point for buying a $150 purifier was on the order of months. B
by Rebelgecko 2y ago
It depends on the box fan and your electricity prices. When I did the math for me, the break even point for buying a $150 purifier was on the order of months. But I'm in California where electricity is relatively expensive