| Business | Phone |
| Port's Heating Svc 360 Wellington St, Gravenhurst P1P 1A7 | (705) 644-1279 |
| R W Sheet Metal Ltd 1012 Narrows Rd, Gravenhurst P1P 1R2 | (705) 687-4302 |
| Tech Air Systems 135 Progress Rd #A, Gravenhurst P1P 1T7 | (705) 687-6233 |
| Tynan's Home Comfort Ltd 23 Beaver Ridge Rd, Gravenhurst | (705) 687-5182 |