HVAC Services in Concord, CA

Connolly Heating & Air Conditioning is a family-owned HVAC contractor serving Concord, CA and the surrounding Contra Costa County. From our shop in nearby Pacheco, our team installs, services, and repairs heating and air-conditioning units, ductwork, and complete comfort systems for homes and businesses across Concord. We have kept East Bay families comfortable since 1992 with honest diagnostics, straight pricing, and work we stand behind.

Concord's Inland Heat and What It Means for Your HVAC System

Concord sits in an inland East Bay valley where summer afternoons regularly climb into the 90s and push past 100 degrees during Diablo Valley heat waves. That sustained cooling load is hard on undersized or aging systems, and homes that only catch the evening Delta breeze still run their AC hard from June through September. Winters are milder but bring damp, chilly nights that a weak furnace or heat pump struggles to hold. Connolly Heating and Air Conditioning installs high-efficiency Carrier systems sized with a full Manual J load calculation for your home, not a rule-of-thumb guess, so your equipment matches Concord's real demand. During wildfire smoke season we also fit media and MERV-rated filtration to keep that outdoor air out of your living space.
 

Looking for HVAC Services Near Me in Concord, CA?

HVAC Services We Provide in Concord, CA

Whether your AC quit during a heat wave or your energy bills keep creeping up, our team handles the full range of home and commercial comfort work in Concord. Below are the services Concord homeowners call us for most. Tap any service to see the details, or call (925) 281-3462 for a straight answer on what your system actually needs.

Air Conditioning 

When your AC cannot keep up during a 100-degree Concord afternoon, you need a real fix, not an upsell. We repair, replace, and install central AC and cooling systems built for inland heat, and we size every unit so it actually cools a two-story home evenly instead of leaving the upstairs bedrooms warm. If a previous contractor oversold you or misdiagnosed the problem, we will tell you the truth about your system, even when that means a smaller repair. Rising PG&E bills often trace back to an aging or oversized unit, and a right-sized high-efficiency system brings those costs back down. You get an honest quote and fast weekday scheduling, not a week-long wait in the heat.

Heating & Furnaces
Concord's chilly, damp winter nights are no place for a furnace that short-cycles or blows cold. We install, replace, and repair furnaces and heating systems for homes across the city and back the work with straight pricing. Ask about pairing a new furnace with an AC combo for year-round comfort.

Heat Pumps

A heat pump handles both cooling and heating from one efficient system, which makes it a strong fit for Concord's hot summers and mild winters. We size and install high-efficiency heat pumps and help you take advantage of the lower operating costs. If your old furnace and AC combo is due for replacement, we will show you whether a heat pump conversion pencils out for your home.
Ductless Mini Splits

For additions, converted garages, or older Concord homes without ductwork, a ductless mini split delivers efficient, room-by-room comfort. We install and repair ductless systems and help you target the rooms that never quite reach the right temperature.

Air Ducts
Leaky or torn ducts let the air you paid to cool escape into the attic, and in Concord's heat that shows up fast on your bill. We install and replace ductwork with sealed, properly fitted runs so your system stops overworking itself. Cleaner airflow also means more even temperatures room to room.

Indoor Air Quality

Dust, dander, and wildfire smoke all move through your vents, and an older system makes it worse. We assess your Concord home and recommend filtration, dehumidifiers, and IAQ upgrades that fit how you actually live. Breathe cleaner air without guessing what to buy.

Zone Control Systems

If your upstairs bakes while the downstairs stays cool, zone control lets you set different temperatures for different areas of the house. We install, repair, and maintain zoning systems for Concord homes so every room gets the comfort it needs without wasting energy on the ones that do not.

HVAC Maintenance

Skipping seasonal service is the fastest way to a breakdown during the first heat wave. Our maintenance keeps your Concord system running efficiently and catches small problems before they become expensive ones. Ask about our maintenance plans for year-round protection and exclusive savings.

Commercial HVAC
Downtime costs your business money. We install, replace, and service commercial heating and cooling systems for Concord businesses, with an eye on energy efficiency and lower operating costs. Ask about a maintenance program that keeps your system running every day of the year.

HVAC Repair in Concord, CA

When a system quits in the middle of a Concord heat wave, you do not have days to wait. We diagnose and repair AC, furnace, heat pump, and ductless failures across the city and offer same-day service on weekday calls when our schedule allows. You get a real diagnosis and a clear price before we start, so you are never guessing what the repair will cost. If the honest answer is a small fix instead of a full replacement, that is what we will tell you.
 

HVAC Installation and Replacement in Concord, CA

If your system is past its prime, a properly sized replacement pays you back in lower bills and steadier comfort. We install and replace complete HVAC systems for Concord homes and businesses using high-efficiency Carrier equipment matched to your home with a full load calculation. Free estimates and financing options make it easier to move forward, and we service all makes and brands, so you are never locked into one manufacturer.

System comparison for Concord, CA homes. Actual fit depends on your home's size, ductwork, and layout.

Not sure which system fits your home and your budget? Here is how the three most common options compare for Concord's climate. When you are ready, we will walk your home and give you a straight recommendation.