The Lasko 751320 lists multiple built-in safety features for indoor use, including overheat protection, a self-regulating ceramic element, and a cool-touch housing, plus an ETL listing. These features are important for bedrooms and pet/kid households, though any space heater still needs clearances and stable placement.
The Mr. Heater F273704 is an accessory, so safety depends heavily on correct installation and compatibility. Reviews emphasize secure connections and keeping the tank at a safer distance, but there are also fitment complaints and reports of a hand-tightener breaking. With propane equipment, ensuring proper fit, avoiding damaged parts, and following the heater’s ventilation requirements are essential.