Hartwig adds: "My grandpa started the business in a small building, and my dad was able to expand and grow it, so it'll be interesting to see where me and my brothers are able to take it next. It should be a fun journey."
There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
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