Short answer: if your air conditioner is failing and your furnace is getting old too, a heat pump is usually the better buy for Rohnert Park and Cotati homes. It cools like an air conditioner, and in winter it reverses and heats your home. If your furnace is newer and working well, a new air conditioner can still make sense. The right call depends on your equipment, your ducts, and your plans.
How an air conditioner and a heat pump differ
An air conditioner moves heat out of your house in summer. That is all it does. You still need a separate furnace for winter.
A heat pump uses the same basic equipment, but it can run in both directions. In summer it moves heat outside. In winter it pulls heat from outdoor air and moves it inside. From the street, the outdoor unit looks much like a standard AC condenser.
In practice, the cooling side feels the same. The difference is what happens in winter.
What our climate means for the choice
Rohnert Park and Cotati sit in the middle of Sonoma County's flat valley floor. Summer afternoons can run hot when the marine layer pulls back, so good cooling matters. Winters are mild, with cool nights but not the deep cold that is hard on any heating system.
That mix is a strong fit for a heat pump. Modern inverter models are built for temperatures well below what we see here. Many homes in both towns were built in the 1960s through 1990s, so it is also common to find a furnace and AC that are both nearing the end of their lives.
Side by side
| New air conditioner | Heat pump | |
|---|---|---|
| Cools in summer | Yes | Yes |
| Heats in winter | No, needs a furnace | Yes |
| Fuel for heating | Gas furnace stays | Electricity |
| Equipment to maintain | Furnace and AC | One system |
| Best when | Furnace is newer and working well | Furnace or AC is old, or you want to move off gas |
Neither option is wrong. We would rather help you pick the right one than sell you the bigger job.
Questions to ask before you decide
- How old is your furnace? If it is close to the end of its life, replacing both at once with a heat pump avoids buying the same equipment twice.
- What shape are your ducts? Either system depends on good airflow. Leaky or undersized ducts cause hot rooms and high bills no matter what is outside. Our duct work team can check them at the estimate.
- Is your electrical panel ready? Moving from gas heat to a heat pump may call for a new circuit, and some older panels need an upgrade first.
- Do you want to cut gas use? A heat pump runs on electricity, so it is the first step toward an all-electric home.
- Are there rooms with no ducts? For additions, garages, or ADUs, a ductless mini split is a heat pump built for one or a few rooms.
Cost and rebates
Both options are priced to your home after a free in-home estimate. Sizing matters either way. We size the system to your house, looking at insulation, windows, sun exposure, and ducts, not to the label on the old unit.
Rebates may be available for heat pumps depending on program funding and your utility. We check what is open when we quote your job and handle the paperwork. The federal 25C tax credit ended for systems installed after December 31, 2025.
If you want to keep it simple, you can read more about our air conditioning work or see the areas we serve in Rohnert Park and Cotati.
Common questions
Does a heat pump cool as well as an air conditioner?
Yes. In cooling mode a heat pump works the same way as an air conditioner, and a properly sized one handles our summer heat spikes.
Can a heat pump heat my Rohnert Park home in winter?
Yes. Our winters are mild, and a well-designed heat pump handles them without trouble. We check ducts and sizing first so every room stays comfortable.
Can I add a heat pump and keep my gas furnace?
Sometimes. A dual-fuel setup pairs a heat pump with your existing furnace. It can be a good middle step if the furnace is still in good shape, and we will talk through both options.
Is replacing just the AC cheaper today?
Usually the upfront cost is lower, since you are replacing one piece of equipment. Over time, a heat pump replaces the furnace too, so the better comparison is the whole system. We will lay out both with written pricing.
Deciding between a new AC and a heat pump for your Rohnert Park or Cotati home? Call Green Core at (707) 988-5858 or request a free estimate.