The short answer
A heat pump suits the mild, damp winters and dry summers of the Santa Clara Valley, and it replaces both a furnace and an air conditioner. Bay Area Air District rules don't force you to replace a working furnace, but gas furnaces made from 2029 must meet a zero-NOx standard. That makes a heat pump the likely choice when your furnace eventually needs replacing.
Many Los Altos homes still heat with a gas furnace and cool with a separate air conditioner, or have no cooling at all. A heat pump handles both jobs with one electric system. It moves heat into the house in winter and pulls it out in summer. ComfortFlow HVAC Contractor installs heat pumps for homeowners in Los Altos (94024), about 18 miles from our San Jose base. Here's what to know before you decide, and how we approach an installation in your home.
Why heat pumps fit the Los Altos climate
The Santa Clara Valley has a Mediterranean climate with dry summers and mild, damp winters. That's a good match for a heat pump. Winter weather here rarely calls for the kind of heating output that pushes these systems hard, and the same equipment handles summer cooling. Cooling matters more in parts of the valley that run noticeably hotter than areas closer to the Bay.
If your home has never had central air, adding a heat pump when you replace the furnace brings cooling into the house without installing a second system. If you already have an aging air conditioner, a heat pump lets you retire two pieces of equipment and replace them with one.
What the Bay Area Air District rules mean for your furnace
Under Bay Area Air District Rule 9-4, natural gas furnaces manufactured from 2029 on must meet a zero-NOx emission standard. In practice, this points homeowners toward heat pumps when they replace a furnace after that date.
The rules don't require you to remove working equipment. They apply only when an existing furnace or water heater fails or is replaced. If your furnace runs fine, no deadline forces a change. If it's getting old, planning ahead gives you time to compare options and schedule the work. Otherwise you may end up making a rushed decision on a cold night.
Water heaters fall under a separate rule, Rule 9-6, which set a zero-NOx date of 2027 for small units. The Air District Board is considering amendments in November 2026 that could delay that date. Check the current rule before you plan a water heater replacement.
What we check before installing
A heat pump has to be sized and placed for your specific house. Before we recommend equipment, we look at:
Homes that have been remodeled or expanded over the years often have ductwork and wiring that don't match the original layout. We check what's actually in your attic, crawlspace, and panel before making a recommendation, so there are fewer surprises on installation day.
- Heating and cooling load, based on the home's square footage, insulation, windows, and layout, rather than the size of the old furnace
- Existing ductwork, including whether it's in usable condition, sealed, and sized for the airflow a heat pump needs
- Electrical service, including whether your panel has capacity for the new equipment or needs work first
- Outdoor unit location, with attention to clearance, drainage, noise near bedrooms and neighbors, and access for future service
- Ducted versus ductless options for additions or rooms the current system doesn't reach well
Incentives and tax credits: what's current
The federal Energy Efficient Home Improvement Credit (25C) covered qualifying heat pumps placed in service before December 31, 2025. It isn't available for installations after that date, so don't count on it when you budget for a new system.
Bay Area homeowners can check BayREN and their local clean energy provider for current heat pump and electrification incentives. Amounts and availability change with each funding cycle. We confirm the current offer before we include it in a quote, so you're working from accurate information.
Heat pump installation in 94024 and nearby
We install heat pumps throughout Los Altos and in nearby Mountain View, Sunnyvale, Cupertino, Santa Clara, and Saratoga. The process starts with an in-home assessment. After that, you get a written recommendation that explains the equipment, any duct or electrical work involved, and what to expect during installation.
Once the system is running, we show you how to use the thermostat and cover basic upkeep, such as changing filters on schedule and keeping leaves and debris away from the outdoor unit.
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