If you're considering replacing your old furnace, there are a few important factors to consider before making a decision:

1. Age of the furnace: furnaces typically last around 15-20 years. If your furnace is getting close to or has surpassed this age, it may be time to start thinking about a replacement.

2. Energy Efficiency: furnaces have become much more energy efficient in recent years, so if your old furnace is not Energy Star rated, you could potentially save money on your energy bills by replacing it with a more efficient model.

3. Repair Costs: if your old furnace is requiring frequent repairs, it may be more cost-effective in the long run to replace it rather than continually repairing it.

4. Comfort: if your old furnace is no longer heating your home evenly or leaving you comfortable, it may be time to replace it with a new one that can better meet your heating needs.

5. Safety: an old furnace can pose a safety risk if it is not functioning properly, so if you're concerned about the safety of your home, it may be worth replacing your furnace for peace of mind.

It's also important to consider the cost of a new furnace and to choose a reliable, licensed contractor to perform the installation. We always provide the best possible prices for replacement to our customers in Bay Area.