| Acronym | Definition |
|---|
| MHAC | Mental Health Association in California (Sacramento, CA) |
| MHAC | Mediterranean Heating and Air Conditioning (Canoga Park, CA) |
| MHAC | Maytag Home Appliance Center (various locations) |
| MHAC | Microhydranencephaly |
| MHAC | Minor Hockey Association of Calgary |
| MHAC | Mental Health Association of Connecticut, Inc. |
| MHAC | Midwest Hispanic AIDS Coalition |
| MHAC | Manufactured Housing Association of Canada |
| MHAC | Mental Health Association of Colorado, Inc. |
| MHAC | Multifrequency High-Gain Antenna Configuration |
| MHAC | Measham Heating & Air Conditioning Ltd (UK) |
| MHAC | Miniature Horse Association of Canada, Inc. |