What makes Calvin Air the right choice for you? Weve been in the HVAC industry for over 15 years. We service all models and all brands. We are committed to providing honest, reliable and professional service. As an Army veteran, owner AJ Calvin is devoted to helping other veterans. We offer military discounts to current and former military members. We are Alabama HACR board certified. We are licensed, bonded and insured. Worried about the price tag? We offer financing so you dont have to worry.