generally - high humidity = less water. And watering about 1x per week ( but with zoi2's comment in mind )
I have mine in a shaded SF window and temps don't drop below 60f. I don't have any fans blowing, would drive me crazy !
If you can grow African Violets ( light, temp & water ) successfully, then phals will not be a problem.
I've never grown African Violets, so, yeah xD I'll get pictures to you guys soon. I've been really busy lately. We're going to a home and garden show today. I might come back with more orchids ;D
In my experience Phals don't seem bothered much by relative humidity or air flow. I live in a much drier climate than you do and I don't run a fan or a humidifier. Mine bloom like clockwork every year. I would say good light and temperatures are the two biggies for Phals. I grow mine in a southwest facing window supplemented by grow lights. For most Phal hybrids it takes a drop in temps, usually in the fall, for them to initiate spikes. Once they have started a spike they like to be warm.