Heat Pumps vs. Air Conditioner

If your central air conditioner needs replacement, you have a real choice: install a new standalone AC, or replace it with a heat pump that handles both cooling and heating. Both work in Berkeley. The costs and the implications for the rest of your home’s heating system are different enough to think through before deciding.

Aarvaks installs both — AC installation starting at $10,000 and heat pump installation starting at $17,000. Here is what the comparison actually looks like.

What a Heat Pump Does That a Standalone AC Does Not

A central AC cools your home. That is all it does. A heat pump moves heat in both directions — out in summer, in during winter — from one outdoor unit connected to your existing duct system. When you replace a central AC with a heat pump, you are not just replacing cooling equipment. You are replacing your cooling system and your heating system at the same time.

That distinction matters because the cost comparison is not simply $10,000–$15,000 versus $17,000 for the same function. If your gas furnace is aging or approaching end of life, the relevant comparison is: one heat pump at $17,000 versus a standalone AC at $10,000–$15,000 plus a gas furnace replacement at $7,500 when it eventually fails.

Upfront Cost

A standalone AC installation at Aarvaks starts at $10,000. A heat pump installation starts at $17,000 for a single-zone residential system. That is a meaningful gap.

Whether the gap is justified depends on the condition of your heating system. If your furnace is 5 years old and working well, an AC-only replacement is the practical choice — you are paying for cooling only, and that is all you need. If your furnace is 15 or more years old, or showing signs of wear, the heat pump’s dual function looks different in the budget.

What Happens to Your Heating When You Choose AC Only

A standalone AC does not affect your furnace. If your furnace is working, it keeps working. The issue is what happens at the next furnace replacement.

Starting in 2029, only zero-NOx furnaces can be sold or installed in the Bay Area, and currently the only zero-NOx appliances available are electric. The rule applies to new appliances only and does not require replacing a working furnace. If your furnace needs replacing in 2029 or later, the replacement will have to be zero-NOx.

This is not a reason to always choose a heat pump. It is context for making the choice clearly.

Berkeley Climate: Why Heat Pump Heating Works Here

A standard air-source heat pump loses heating capacity as the outdoor temperature drops below about 30°F, according to a U.S. Department of Energy Building America report. Berkeley’s winters are mild: at NOAA’s Berkeley weather station, average daily lows are 42°F in January and 43°F in December (1981–2010 normals).

Who Should Choose a Heat Pump

• Homes where the gas furnace is nearing replacement — one heat pump replaces both the AC and the furnace, and it is already zero-NOx under the Air District’s 2029 furnace standard
• Homes that need both heating and cooling replacement — one heat pump at $17,000 versus separate AC and furnace replacements; the effective gap is smaller than it appears

Who Should Choose a Standalone AC

• Homes where the furnace is recently replaced and working well — AC-only replacement at $10,000–$15,000 is practical; no reason to pay for heating replacement you do not need
• Shorter ownership horizon — at Aarvaks’ starting prices, a heat pump starts at $17,000 and a standalone AC at $10,000
• Budget constraints — a standalone AC delivers cooling at a lower entry price

Aarvaks installs both systems. The numbers above are the same numbers you would see in a written estimate from us.