Located on 1348 La Mirada Dr, MHS Heating & Air Conditioning, Inc is in San Marcos. MHS Heating & Air Conditioning, Inc They have not yet been reviewed on MojoPages.com. Their hours of operation are Monday 7:00am to 4:00pm , Tuesday 7:00am to 4:00pm , Wednesday 7:00am to 4:00pm , Thursday 7:00am to 4:00pm , Friday 7:00am to 4:00pm , Saturday Closed , Sunday Closed and they can be reached by calling (760) 744-9450 or going to their website .