https://onwar.se/ 2026-10-02T21:21:19+00:00 https://onwar.se/ https://onwar.se/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2026-10-02T16:53:33+00:00 Anonymous (anonymous@undisclosed.example.com) https://onwar.se/doku.php?id=understanding_george_air_conditioning:a_comprehensive_guide&rev=1790960013&do=diff (Image: https://i.ytimg.com/vi/UZXC4PzaSWw/hq720.jpg)Additionally, older models may not comply with current safety standards, posing risks to your home and family. As they age, they become less efficient, leading to higher energy bills and inconsistent heating. Most furnaces last between 15 to 30 years, depending on their type, maintenance, and usage. Furnaces, like any other mechanical system, have a limited lifespan.