![Rinnai EX22DTWN Direct Vent Wall Furnace, Indoor Natural Gas Heater, Energy Efficient Space Heater, 21,500 BTU, White - Amazon.com Rinnai EX22DTWN Direct Vent Wall Furnace, Indoor Natural Gas Heater, Energy Efficient Space Heater, 21,500 BTU, White - Amazon.com](https://m.media-amazon.com/images/I/51W+kRd8nvL._AC_UF894,1000_QL80_.jpg)
Rinnai EX22DTWN Direct Vent Wall Furnace, Indoor Natural Gas Heater, Energy Efficient Space Heater, 21,500 BTU, White - Amazon.com
Unique Medical Centre Cranbourne - The use of open-flued gas heaters, especially Vulcan or Pyrox Heritage gas space heaters, may produce increased indoor carbon monoxide levels under certain conditions. Carbon monoxide (CO)
![Dyna-Glo 12,000 BTU Vent Free Infrared Natural Gas Thermostatic Wall Heater IRSS12NGT-2N - The Home Depot Dyna-Glo 12,000 BTU Vent Free Infrared Natural Gas Thermostatic Wall Heater IRSS12NGT-2N - The Home Depot](https://images.thdstatic.com/productImages/cd07a2f9-700e-467d-ba69-eed89d391c3b/svn/whites-dyna-glo-gas-wall-heaters-irss12ngt-2n-64_600.jpg)
Dyna-Glo 12,000 BTU Vent Free Infrared Natural Gas Thermostatic Wall Heater IRSS12NGT-2N - The Home Depot
![Safety alert affects four open-flued gas heaters | Department of Mines, Industry Regulation and Safety Safety alert affects four open-flued gas heaters | Department of Mines, Industry Regulation and Safety](https://www.commerce.wa.gov.au/sites/default/files/styles/style_a2__454_wide_/public/atoms/thumbnails/image/nectre_2000_2.png?itok=QUB1hyOU)
Safety alert affects four open-flued gas heaters | Department of Mines, Industry Regulation and Safety
![Improving the thermal efficiency of balanced flue gas space heaters currently marketed in Argentina - ScienceDirect Improving the thermal efficiency of balanced flue gas space heaters currently marketed in Argentina - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0973082621000752-ga1.jpg)