Hi! Are you sure that you don’t overpay for your electricity bills? My friend recently changed his energy sources on the Titan Upgrade’s HVAC core products (https://titanupgrades.com/services/hvac/), such as cool roof, windows, solar power, cool paint, insulation that are environmentally friendly. He’s satisfied with the results. Therefore, I would suggest you pay attention to how much money you pay for electricity bills and whether your home’s energy source protecting the environment or not. If your answer is negative, then I would recommend that you contact Titan Upgrades. Have a nice day!