Lead with availability, not slogans
HVAC is the rare home service where urgency is the default state. A homeowner with no heat at midnight does not want a hero image and a tagline — they want a phone number, the words '24/7 emergency repair', and confidence that someone will answer.
Pull emergency availability, phone number, and service hours to the top of the homepage. Add license numbers and EPA 608 refrigerant certification nearby. That pattern converts far better than a slick hero with a generic 'comfort solutions' tagline.