The short answer
Heat pumps suit the mild Los Altos climate well and replace both a furnace and an AC with one system. We size the unit to your home, check the ducts and electrical panel, and help you choose between a full heat pump, a dual-fuel setup or ductless heads.
A heat pump is one machine that moves heat out of your house in summer and pulls heat into it in winter. That trick works especially well in a climate like Los Altos, where winter lows are mild and damp rather than bitter, so the equipment spends most of its time in its efficient range. Homeowners in 94024 ask us about heat pumps for different reasons: an aging furnace, a house that never had cooling, a solar array that could power more of the home, or simply a wish to get off gas. ClearSky Heating & Cooling travels about ten miles west from San Jose to design and install systems that suit each of those starting points.
Why So Many Homeowners Are Asking Now
The Bay Area Air District has set a zero-NOx emission standard for natural gas furnaces manufactured from 2029. In practice, that means a homeowner replacing a furnace after that date will be looking mostly at heat pumps. The rule does not make anyone remove a furnace that still works; it only applies when equipment is replaced or fails.
For a family with a furnace that is fifteen or more years old, though, the question becomes when, not whether. Planning a heat pump on your own schedule, with time to compare options and arrange any electrical work, is usually calmer than deciding during a breakdown in January.
Three Ways to Set It Up
There is no single correct configuration. The right one depends on your ducts, your panel, how you use each room and how quickly you want to move away from gas.
- Full ducted heat pump: an outdoor heat pump plus an indoor air handler replaces both the furnace and the air conditioner, using your existing ducts
- Dual-fuel: the heat pump handles cooling and most heating, while a gas furnace stays in place as backup for the coldest mornings
- Ductless mini-splits: individual heads serve rooms or zones, ideal for additions, converted garages or homes without ductwork
- Hybrid layouts: a ducted system for the main house combined with one or two ductless heads for rooms the ducts never reached well
The Parts of the Job People Overlook
Electrical capacity is the first thing we check. A heat pump with electric backup heat needs dedicated circuits, and some older panels in Los Altos homes are already close to full, especially if there is an EV charger or a recent kitchen remodel. We look at the panel during the estimate and tell you whether the system fits as is, needs a load-management device, or calls for a panel upgrade.
Ducts are the second. Heat pumps deliver warm air at a lower temperature than a gas furnace, so leaky or undersized ducts that you never noticed with a furnace can leave rooms feeling lukewarm. Sealing and correcting a few runs often makes more difference to comfort than the equipment brand.
The third is placement. The outdoor unit needs clearance for airflow and a spot where defrost water can drain without pooling on a walkway.
How We Size and Install
We run a room-by-room heating and cooling load calculation instead of copying the size of the old furnace, which was very likely oversized. Variable-speed heat pumps can slow way down on mild days, so getting the size right lets them run long, quiet, efficient cycles.
A typical ducted installation takes one to three days. We remove the old equipment, set the outdoor unit and indoor air handler, run the refrigerant lines, complete electrical work, pressure test and evacuate the system, then commission it with airflow and temperature checks. Before we leave, we show you how the thermostat handles heating, cooling and any backup heat.
Credits and Incentives, Stated Plainly
The federal Energy Efficient Home Improvement Credit, known as 25C, applied to qualifying heat pumps placed in service before December 31, 2025. It is not available for systems installed after that date, so we do not include it in proposals.
Local programs are a different story. BayREN and your community clean energy provider may offer heat pump or electrification incentives, but amounts change with each funding cycle. We check what is currently available for Los Altos addresses and confirm the offer before putting it in your quote. If you are also thinking about a heat pump water heater, note that the Air District's water heater rule timing may be amended, so it is worth checking the current status before planning that swap.
More services in Los Altos
- AC Repair in Los Altos
- Heating Repair in Los Altos
- AC Installation in Los Altos
- Furnace Repair in Los Altos