Related by context. Frequent words. (Click for all words.) 68 chimney 56 ductwork 56 attic 53 ventilation 52 duct 51 chimneys 50 stove 50 ventilated 49 wood stove 49 heater 49 furnace 49 fireplace 49 vents 49 water heater 48 burning stove 46 engine compartment 46 cavity 46 ducts 45 smoke detector 45 eaves 45 smoke alarm 45 radiator 45 carbon monoxide 44 carbon monoxide detector 44 electrical wiring 44 propane tank 44 smoke detectors 44 wood stoves 44 heat exchanger 44 exhaust pipe 44 ventilate 44 nozzle 43 oven 43 radiators 43 boiler 43 space heaters 43 pipe 43 furnaces 42 condenser 42 exterior walls 42 smoke alarms 42 pipes 42 sprinkler systems 42 fireplaces 41 sprinkler system 41 insulation 41 stovetop 41 valve 41 gasket 41 flammable materials 41 boilers 41 skylight 41 trachea 41 electrical outlet 41 pneumonia 40 carbon monoxide poisoning 40 respiratory illness 40 sump 40 flange 40 air conditioner 40 stoves 40 compressor 39 gutters 39 cooker 39 whooping cough 39 transformer 39 vapors 39 extinguisher 39 circuit breaker 39 toxic fumes 39 humidifier 39 carbon monoxide detectors 39 condensation 39 caulk 39 combustible materials 39 airflow 38 heating 38 mold 38 radon 38 pertussis 38 confined spaces 38 heaters 38 sprinklers 38 respiratory 38 inhalation 38 flammable 38 slats 38 piping 38 vapor 38 cavities 38 septic tank 38 diaphragm 37 sealant 37 airway 37 caulking 37 cupboards 37 clothes dryer 37 carport 37 dryer 37 hose 37 inhaled