National HVAC Group

National HVAC Group (NHG) was founded by Commercial Insurance Services (CIS) an over 41-year company to service HVAC repairs and installations nationally especially for unique situations. NHG has the expertise in all aspects of heating ventilation and air conditioning including boilers and chillers for commercial and residential applications.

NHG staff has a combined experience of over 130 years of technical and installation expertise. From larger retail facilities to religious facilities to homes, NHG has the knowledge to get the job done accurately utilizing some of the most experienced HVAC companies across the United States. These companies have met our stringent qualifications with respect to ability, organization, man-power and stability. To date, these companies have performed thousands of inspections, repairs and new equipment installations.

NHG staff is committed to deliver the highest quality of HVAC repair or replacement. Knowledgeable about current technologies, budgets, schedules and our client’s priorities, NHG staff strive for perfection in service, communication and equipment.


Heating, Ventilation and Air Conditioning Products: