| 7512 | Health protection program, federal administration | |
| 6603 | Health reinsurance underwriters | |
| 7310 | Health research and development laboratories | |
| 7421 | Health risk management consultants | |
| 8519 | Health screening service | |
| 9241 | Health spas (without lodging), physical fitness | |
| 7512 | Health standard services, federal | |
| 7511 | Health statistics centres, federal | |
| 7511 | Health statistics centres, provincial | |
| 9241 | Health studio, physical fitness | |
| 3140 | Hearing aid batteries, manufacturing | |
| 5260 | Hearing aid repair | |
| 3311 | Hearing aids, electronic, manufacturing | |
| 5231 | Hearing aids, retail | |
| 5139 | Hearing aids, wholesale | |
| 8519 | Hearing testing service | |
| 3420 | Hearse bodies, manufacturing | |
| 7111 | Hearse rental to undertakers | |
| 6022 | Hearse rental with driver | |
| 7111 | Hearse rental, without drivers | |
| 7111 | Hearses and limousines, rental without drivers | |
| 3410 | Hearses assembling on chassis of own manufacture | |
| 3410 | Hearses, assembling on purchased chassis | |
| 3311 | Heart-lung machines, manufacturing | |
| 5150 | Heat exchange equipment, industrial, wholesale | |
| 2919 | Heat exchangers, manufacturing | |
| 4530 | Heat pump installation | |
| 2919 | Heat pumps, manufacturing | |
| 5143 | Heat pumps, wholesale | |
| 2429 | Heat sensitized (i.e., thermal) paper, made from purchased paper | |
| 2892 | Heat treating ferrous metals and metal products, for the trade | |
| 2892 | Heat treating non ferrous metals and metal products, for the trade | |
| 2914 | Heat treating ovens, industrial process type, manufacturing | |
| 4030 | Heat, steam, distribution | |
| 2930 | Heaters and heating apparatus, domestic, electric, manufacturing | |
| 2930 | Heaters, immersion, household-electric, manufacturing | |
| 5139 | Heaters, portable electric, wholesale | |
| 2930 | Heaters, space (except portable electric), manufacturing | |
| 2930 | Heaters, space, electric, manufacturing | |
| 2930 | Heaters, swimming pool, electric, manufacturing | |