SEO blog content for a regional HVAC services company

Comfort Air serves about 12,000 households across Arizona and our website gets almost no organic traffic - basically everything comes from paid ads, which is getting expensive. We hired an agency last year and got back generic articles that could have been about any HVAC company anywhere. Not doing that again. We want 12 articles over six weeks targeting keywords we have already researched (list provided): things like AC maintenance schedules for desert climates, heat pump versus conventional AC for Phoenix homeowners, and monsoon-season humidity questions our techs actually get asked. Each piece 1,200-1,600 words, optimized but readable, with title tags and meta descriptions included. Our service manager will do a technical accuracy pass on each draft. You do not need HVAC experience, but you need to be able to interview our techs (two 30-minute calls) and turn what they say into content that sounds like a knowledgeable neighbor, not a brochure.