They better check out the impact on homeowner's insurance rates.
Oxygen Material Safety Data Sheet
(excerpts)HEALTH HAZARD DATA
TOXICOLOGICAL PROPERTIES
Oxygen is nontoxic under usual conditions of use. Breathing pure oxygen at one atmosphere, however, may produce cough and chest pains within 8-24 hours. Concentrations of 60% may produce these symptoms in several days. At two atmospheres symptoms occur in 2-3 hours. Partial pressure of oxygen in excess of two atmospheres may produce a variety of central nervous system manifestations including tingling of fingers and toes, visual and hearing disturbances, abnormal sensations, impaired coordination, confusion, muscle twitching, and seizures resembling those of epilepsy. Severe hazards may be present when confusion and impaired judgment lead to operational errors. Infants exposed to oxygen levels in excess of 35-40% may suffer permanent visual impairment or blindess due to retrolental fibroplasia.FIRE AND EXPLOSION HAZARD DATA
SPECIAL FIRE FIGHTING PROCEDURES
Oxygen is nonflammable, but supports and VIGOROUSLY ACCELERATES COMBUSTION of flammables. To fight fires, Shut off sources of oxygen and fight like conventional fire.
UNUSUAL FIRE AND EXPLOSION HAZARDS
Oxygen is nonflammable, but supports and VIGOROUSLY ACCELERATES COMBUSTION of flammables. Some materials which are noncombustible in air will burn in the presence of oxygen.
Yeah, you can make your own hydrogen at home,
but whatcha gonna do with all that excess Oxygen you're gonna be left with?