Ron HollandAC & Heating Service, Inc. Who We Are… A brother-sister team providing 24 hour service to New Ulm, MN and all surrounding communities since 1985. Who We Are What We Do…. We service and install all brands of residential and commercial air conditioning and heating.We service and install all brands of commercial refrigeration and commercial kitchen equipment. What We Do To schedule a service call or free estimate…. Tap to Call Us