I came across an interesting product at Canadian Tire for those of you with suited units. In Ontario the Fire Code allows for much less strict/intensive fireproofing between suited units if there are interconnected fire alarms. This can be a pain and possibly expensive to hard wire in but these units which are made by Kidde are interconnected wirelessly and are only $45/each. I put these in the apt. in my personal residence which is contained with Type X drywall but I`m using these anyways for peace of mind.
S.G.
S.G.