A heat pump can help your HVAC system run more efficiently. In most cases, it is installed along with a new furnace. However, it can be added to an older furnace if it is less than ten years old and in excellent working condition. Even though you may have a specific brand you mind, ask your certified contractor about top HVAC brands such as Carrier, Bryant, Goodman, Amana, and Trane.
Deciding whether to add a heat pump to your old furnace or to replace the entire unit is a very serious decision. Your heat pump contractor will know best, but consider if he may have ulterior motives. Some furnace dealers are licensed contractors, and might just try to sell you more than what you actually need. Other contractors only have your best interest in mind, and if they suggest an entire new system, you should consider it.