At NorthStock, formerly H-Mac Systems, we are committed to providing an easy purchasing experience, competitive pricing, and quick delivery of the HVAC products you need to keep your projects on schedule. We’re proud to focus on meeting the needs of HVAC professionals. Give us a try! We look forward to becoming your reliable, trusted source for HVAC equipment and parts. NorthStock, Inc. supplies heating, ventilating and air conditioning (HVAC) equipment to commercial and industrial end users and contractors. This equipment is used in a wide variety of applications: - Industrial: Refineries, power plants, mines, factories, wastewater treatment plants, food processing plants, oil and gas rigs - Commercial: Shopping centers, office buildings, restaurants, hotels, health clubs - Education: Schools, colleges, universities - Government: Office buildings, courthouses, municipal buildings, police stations, fire stations - Military: Hangars, barracks, maintenance buildings - Healthcare: Hospitals, medical offices, rehabilitation centers