The short answer
ClearSky installs ducted, ductless and dual-fuel heat pumps across Fremont, sized for both heating and cooling. Heat pumps suit the area's mild winters, Air District rules favor them for future furnace replacements, and no rule forces you to replace working equipment.
Many Fremont homeowners have heard heat pumps described as either a miracle or a mistake, and the truth sits somewhere more practical. A heat pump is an electric system that moves heat instead of burning fuel: out of the house in summer, into it in winter. In a climate with mild, damp winters and dry summers, that approach works well, provided the system is sized, placed and connected correctly. ClearSky Heating & Cooling installs ducted and ductless heat pumps throughout Fremont, about eight miles north of our San Jose base. Here we clear up common misconceptions, walk through the situations we see most often in Fremont homes, and explain how current Air District rules and incentives affect your timing.
Common misconceptions, answered
Some concerns about heat pumps come from older equipment or colder parts of the country. Here is how they hold up for a Fremont home today.
- "Heat pumps cannot keep up in winter." Fremont's winters are mild, and a properly sized modern heat pump handles typical cold mornings comfortably.
- "The air never feels warm." Heat pump air is warm rather than hot, and it runs in longer, steadier cycles that keep rooms more even.
- "It will be loud outside." Variable-speed outdoor units are quiet at low speed, and careful placement keeps sound away from bedrooms.
- "I have to remove all my gas appliances." Many owners convert heating and cooling first and keep a gas range or water heater for now.
- "New rules make me replace my furnace." They do not; Air District rules apply only when equipment fails or is replaced.
Three Fremont scenarios we see often
Both the furnace and the AC are old. This is the cleanest case for a heat pump. One new outdoor unit and one indoor air handler replace two aging systems, using the existing ducts after any needed sealing or repairs.
There is a furnace but no air conditioning. A heat pump adds cooling at the same time it replaces the furnace, which can make more sense than bolting a new AC onto a furnace that will need replacing soon anyway.
Part of the house was never well served. Additions, converted garages and rooms at the end of long duct runs are good candidates for ductless heads, either as a standalone solution or alongside a ducted heat pump for the main house.
What we check before we recommend equipment
A good heat pump installation starts with the house, not the brochure. We calculate heating and cooling loads room by room, inspect ducts for leaks and size problems, and look at insulation in the attic. Fremont homes nearer the hills can see colder nights than those by the Bay, which can push the heating load higher and change the equipment size.
We also review the electrical panel. A heat pump and any backup heat strips need dedicated circuits, and some older panels have limited room. If an upgrade or load management device is needed, we say so at the start. Finally, we pick an outdoor location with open airflow, solid footing and a drainage path for defrost water.
Rules, credits and incentives
Fremont is within the Bay Area Air District. Under its Rule 9-4, natural gas furnaces manufactured from 2029 must meet a zero-NOx emission standard. In practice, that points homeowners toward heat pumps when they replace a furnace after that date. The rules do not require replacing a furnace or water heater that still works.
Water heaters are covered separately. The zero-NOx date for small water heaters under Rule 9-6 was set for 2027, and the Air District Board is considering amendments in November 2026 that could delay it. Check the current rule before planning a water heater replacement.
The federal 25C credit applied only to heat pumps placed in service before December 31, 2025, so it is not available for new installations. BayREN and your local clean energy provider may offer current heat pump and electrification incentives; because amounts and availability shift with each funding cycle, we confirm the offer before quoting it.
Installation and the areas we cover
Most ducted heat pump replacements take one to three days. We handle the City of Fremont permit, remove the old equipment, set the indoor and outdoor units, connect refrigerant lines and wiring, then test heating and cooling and set up the thermostat for heat pump operation. We also install heat pumps in Newark, Milpitas, Sunnyvale, Santa Clara and Mountain View.