The short answer
In most Menlo Park homes a heat pump replaces both the gas furnace and the AC, using the existing ducts when they test well or ductless heads when they do not. We plan the system, confirm electrical capacity and current incentives, and install and test it in both modes.
The most common heat pump project we see in Menlo Park starts with a familiar setup: a gas furnace in a closet or garage, an aging air conditioner outside, and an owner who would rather replace both with one efficient system than repair them separately. In other homes, the starting point is a wall heater and no cooling at all. Either way, a heat pump can provide heating and cooling from a single outdoor unit, and the 94025 area's mild climate suits the technology well. ExpertFlow HVAC Repair Service, based about nine miles south in Los Altos, plans and installs heat pumps throughout Menlo Park. This page lays out the project from start to finish, including the timeline, what changes inside the house, and which rules and incentives are current.
Converting from a furnace and AC
When a home already has forced-air heating and central air, a ducted heat pump is usually the most direct replacement. The outdoor condenser is swapped for a heat pump, and the furnace is replaced by an electric air handler, or in some cases kept as a backup in a dual-fuel arrangement. The existing ducts, thermostat location and refrigerant line path can often be reused, which keeps the project contained.
The key test is the ductwork. Heat pumps deliver air that is warm rather than hot, so they rely on good airflow to keep rooms comfortable. We measure static pressure, inspect duct runs and sealing, and confirm the returns are large enough before recommending a ducted system.
Homes without ducts
Older Menlo Park homes heated by a wall furnace or floor furnace have no duct system to reuse. Ductless mini-split heat pumps fit these homes well. An outdoor unit connects to one or more indoor heads placed in the main living area and bedrooms. Each head can be set independently, so rooms that are used more get more attention.
For homes in between, such as those with ducts serving only part of the house, a combination of a ducted unit and a ductless head or two is often the cleanest answer.
Project timeline, step by step
Every project is different, but most follow the same general path from first visit to finished system.
- Site visit and load calculation: we measure rooms, note windows and insulation, and inspect ducts, the electrical panel and the existing equipment.
- Proposal: a written plan with equipment, placement, duct or electrical work and the options you asked to compare.
- Incentive check: we confirm current BayREN and local clean energy provider offers before finalizing the quote.
- Permit: we file for the city permit required for new equipment in Menlo Park.
- Installation: removal of old equipment, setting the outdoor unit and air handler or ductless heads, line set, wiring and controls.
- Commissioning: testing in heating and cooling, checking airflow and refrigerant charge, and walking you through operation.
What the rules actually say
The Bay Area Air District has adopted rules that affect gas heating appliances. Under Rule 9-4, natural gas furnaces manufactured from 2029 must meet a zero-NOx emission standard, which in practice points replacements toward heat pumps. The district's appliance rules do not require replacing equipment that still works; they apply only when a furnace or water heater fails or is replaced.
Water heaters follow Rule 9-6. The zero-NOx date for small water heaters was set for 2027, and the Air District Board is considering amendments in November 2026 that could delay it. If you plan to electrify your water heater along with your heating, check the current status of that rule first.
On the federal side, the 25C Energy Efficient Home Improvement Credit covered qualifying heat pumps placed in service before December 31, 2025, and is not available for new installations after that date.
Electrical considerations
Removing a gas furnace and adding a heat pump with backup heat shifts load onto your electrical panel. Some older panels in the city are already near capacity. We check the panel rating and available space at the first visit. Options such as right-sizing backup heat, choosing variable-speed equipment with lower startup current or using load management can sometimes avoid a full upgrade. When an upgrade is needed, we tell you early so it can be scheduled. We also install heat pumps in East Palo Alto, Atherton, Palo Alto, Mountain View and Los Altos Hills.
More services in Menlo Park
- AC Repair in Menlo Park
- Heating Repair in Menlo Park
- AC Installation in Menlo Park
- Furnace Repair in Menlo Park
