Heating & Air Conditioning in Berkeley, CA
Aarvaks is based at 729 Dwight Way in Berkeley and was founded in 1929. Furnace and AC installation and repair, heat pump conversion, and ductless mini-splits for older Berkeley homes without ductwork. Residential and commercial. CSLB #1146520.
What Berkeley’s Electrification Rules Mean for Your HVAC System
Berkeley has two active policies that directly affect HVAC decisions — one tied to home sales, one tied to air quality. Understanding both helps you make the right equipment choice.
BESO — Mandatory at Point of Sale
Starting January 1, 2026, anyone selling a single-family home or duplex in Berkeley must meet the Building Emissions Saving Ordinance (BESO), which requires each unit to earn at least six credits. A heat pump HVAC system earns all six when it heats all conditioned areas of the home. A home that already has an electric heat pump for space or water heating may be exempt from additional upgrades. If upgrades are left to the buyer, the buyer has two years from the date of sale to complete them, and the seller and buyer each deposit $2,500 with the City.
Bay Area Air District — Zero-NOx Furnaces from 2029
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, such as heat pumps. The rule applies to new appliances only. It does not require replacing a working furnace and applies when your current furnace needs replacing.
Permits for HVAC Work
The City of Berkeley requires a permit to install, alter, repair, or replace any gas or mechanical system, with limited exemptions such as replacing a minor part of an appliance. Aarvaks handles permit coordination for Berkeley and every city and county we serve as part of the project scope.
Berkeley’s Older Homes Require a Different Approach to HVAC
About half of Berkeley’s housing units (49%) were built before 1940, and 78% before 1970, according to the Census Bureau’s 2024 American Community Survey. The right HVAC solution depends on what the home actually has.
Homes Without Ductwork
Ductless mini-splits use wall-mounted indoor units connected to an outdoor unit, with no duct modification required. A single-zone mini-split installation starts at $6,500. To earn BESO credits, the heat pump system must heat all conditioned areas of the home.
Multi-Zone Systems
One outdoor unit can serve two to five indoor units, giving each room or area its own zone. Multi-zone systems are priced based on zone count, indoor unit type, and line set routing.
Homes with Existing Ductwork
For homes with existing ductwork, a ducted heat pump replaces a gas furnace and central AC with a single system. Duct condition is assessed and documented during the estimate visit before any equipment recommendation is made.
Berkeley’s Microclimate and Your Heating and Cooling Load
At NOAA’s Berkeley weather station, average daily highs run 74–76°F from June through September (1991–2020 normals). Heating needs far outweigh cooling: the station averages 2,579 heating degree days a year, against 202 cooling degree days.
Heating Drives the Load
Heating degree days at the Berkeley station run about 435 a month in December and January and stay above 200 a month from November through April. The station averages fewer than 1 night a year at 32°F or below, so the load is long and steady rather than extreme.
Cooling Peaks in September
Cooling degree days at the station are highest in September, at about 55, and August, at about 36. The station averages about 6 days a year at 90°F or above.
A Six-Month Heating Season
With the system heating from November through April, its heating efficiency matters more to the energy bill than its cooling efficiency. A heat pump covers the heating load and provides cooling from the same system.
HVAC Services in Berkeley
Installation, repair, and maintenance for all residential and commercial HVAC systems throughout Berkeley. All brands serviced. $79 residential diagnostic fee. Permit coordination included on all installations.
Heat Pump Installation & Repair
Ducted heat pump installation for Berkeley homes with existing ductwork — replaces gas furnace and central AC in one system upgrade. Earns all 6 BESO credits when it heats all conditioned areas of the home. Single-zone systems starting at $17,000. Carrier Authorized Dealer. All brands serviced for repair.
Mini-Split Installation & Repair
Ductless mini-splits for homes without ductwork. No duct modification required. Earns BESO credits when the system heats all conditioned areas of the home. Single-zone systems starting at $6,500. Carrier, Mitsubishi, and Bosch systems. Multi-zone configurations for whole-home comfort without ductwork.
Heating & Air Conditioning
Furnace installation, repair, and tune-up. Central AC installation and repair. All brands serviced. $79 residential diagnostic fee. Furnace installation starting at $7,500. AC installation starting at $10,000.
Heat Pump Incentives for Berkeley Homeowners
The federal heat pump tax credit has expired, and the TECH Clean California and HEEHRA single-family programs are reserved statewide. Program availability changes. We identify what applies to your project during the estimate.
BESO Compliance — The Sale Driver
A heat pump HVAC system that heats all conditioned areas of the home earns all six BESO credits in one upgrade. Completing it before you sell meets the requirement up front, instead of leaving it to the buyer with a two-year deadline and a $5,000 deposit with the City. A home that already has an electric heat pump may be exempt from additional upgrades.
Federal Tax Credits
The federal Section 25C credit, 30% of the cost of a qualifying heat pump, covered improvements made through December 31, 2025. Installations completed in 2026 do not qualify.
State & Utility Programs
TECH Clean California’s single-family heat pump HVAC incentives were reserved statewide as of November 14, 2025. HEEHRA single-family rebates were fully reserved statewide as of February 24, 2026, and no new income verification requests are being accepted. Berkeley is in Ava Community Energy’s service area, and Ava’s website has a tool that finds incentives you’re eligible for at avaenergy.org.
All incentive claims should be verified at the time of your installation. Aarvaks does not guarantee rebate availability or tax credit eligibility for any specific installation. Current programs for every county are on our rebates page.
Frequently Asked Questions
Do I need a permit to replace my furnace or air conditioner in Berkeley?
Yes. The City of Berkeley requires a permit to install, alter, repair, or replace any gas or mechanical system, with limited exemptions such as replacing a minor part of an appliance. Aarvaks handles permit coordination for Berkeley and every city and county we serve as part of the installation scope.
What is Berkeley’s BESO ordinance and how does it affect HVAC decisions?
Berkeley’s Building Emissions Saving Ordinance (BESO) applies to sales of single-family homes and duplexes starting January 1, 2026. Each unit must earn at least six credits, and a heat pump HVAC system that heats all conditioned areas of the home earns all six. A home that already has an electric heat pump may be exempt from additional upgrades. If upgrades are left to the buyer, the buyer has two years from the date of sale to complete them, and the seller and buyer each deposit $2,500 with the City.
Are mini-splits a good fit for Berkeley’s older homes?
For homes without ductwork, yes. A ductless mini-split uses wall-mounted indoor units connected to an outdoor unit, so no ductwork is needed, and the City of Berkeley describes ductless systems as ideal for homes without existing ducts. Single-zone systems start at $6,500. To earn BESO credits, the heat pump system must heat all conditioned areas of the home.
How much does heat pump installation cost in Berkeley?
Ducted heat pump installation — replacing a gas furnace and central AC with one heat pump system using existing ductwork — starts at $17,000 for a single-zone system. Ductless mini-split installation for homes without ductwork starts at $6,500 for a single-zone system. Final cost depends on zone count, equipment selection, duct condition, and electrical scope. Aarvaks provides a written itemized quote before any work begins — no commitment required to get an estimate. Book online or call 510-848-5010.
Are there heat pump rebates available for Berkeley homeowners in 2026?
The federal Section 25C tax credit covered improvements made through December 31, 2025, so it does not apply to 2026 installations. TECH Clean California’s single-family heat pump HVAC incentives were reserved statewide as of November 14, 2025, and HEEHRA single-family rebates were fully reserved statewide as of February 24, 2026. Ava Community Energy, which serves Berkeley, has an incentive lookup tool at avaenergy.org. We identify what applies during the estimate.
Schedule HVAC Service in Berkeley
Founded 1929. 729 Dwight Way, Berkeley, CA 94710. CSLB #1146520. Residential and commercial HVAC — installation, repair, and maintenance across all brands.