Updated 5/26/22. Investing in a new furnace is one of the most significant things you can do for your house. Your central air conditioner with gas heat or warm air oil furnace’s efficiency and effectiveness should be monitored. For your own safety and the sake of your wallet, you need to know when to invest in a new heating and cooling unit. A safe and effective heating system is essential for a healthy and pleasant household. You need a unit like the Rheem AC 4 ton that doesn’t degrade the air quality in your house while still providing adequate heating.…