Pleasanton, CA Support 24/7: (650) 698-7979

Get a Quote Now

5.0 Google Reviews 11+ Years Experience NATE Certified Licensed & Insured 24/7 Live Dispatch

Book Now

Pleasanton, CA

Support 24/7: (650) 698-7979

Book Today

Engineered Comfort, Measured In Degrees.

Same-day HVAC repair & installation across the Bay Area. NATE-certified technicians, 24/7 emergency dispatch.

Under 24-hour emergency dispatch
100% upfront, line-item pricing
NATE & EPA certified technicians

Locally owned · Licensed & insured · Serving the Bay Area

Onzone Heating & Cooling technician

Cooling & Heating / NATE Certified / Residential + Commercial / Pleasanton, CA / 24-Hour Dispatch / Lic. & Insured / Cooling & Heating / NATE Certified / Residential + Commercial / Pleasanton, CA / 24-Hour Dispatch / Lic. & Insured /

N.02 / Services

HVAC across the Bay Area.

HVAC Installation

Furnace, AC, heat pump & mini-split installs.

Request Service

HVAC technician installing rooftop unit

HVAC Service

Diagnostics & component-level repair.

Request Service

Refrigeration

Commercial walk-ins, reach-ins & line work.

Request Service

Heating

Furnace, boiler & heat-pump repair.

Request Service

Maintenance

Seasonal tune-ups, residential & commercial.

Request Service

Duct Cleaning

NADCA-protocol cleaning — allergens & buildup.

Request Service

Attic ductwork ready for cleaning

NATE & EPA certified technicians

Transparent, line-itemised pricing

24/7 emergency dispatch — Bay Area

Residential & commercial scope

N.03 / Field Work

From the field.

Team

ONZONE senior technician performing diagnostic

FIG. G.01 / Service

Senior Tech, Refrigerant Diagnostic

Indoor

Ceiling cassette installation

FIG. G.02 / Indoor

Mitsubishi 1-Way Ceiling Cassette

Outdoor

Two Mitsubishi outdoor units

FIG. G.03 / Outdoor

Dual-Zone Condenser Pair

Indoor

Ceiling cassette installation in progress

FIG. G.04 / Indoor

Cassette Install, Protected Workspace

Indoor

Ceiling cassette corner detail

FIG. G.05 / Indoor

Corner Cassette, Plenum Detail

Outdoor

Large Mitsubishi Multi outdoor unit

FIG. G.06 / Outdoor

Mitsubishi Multi, 4-Ton Capacity

Outdoor

Cooper & Hunter outdoor unit

FIG. G.07 / Outdoor

Cooper & Hunter Mini-Split

Team

ONZONE technician with branded shirt

FIG. G.08 / Service

On-Site, Commercial Diagnostic

Mechanical Air handler in mechanical closet

Air handler in mechanical closet

FIG. G.09 / Mechanical

Mitsubishi Air Handler, Closet Mount

Indoor

Wall-mounted indoor unit

FIG. G.10 / Indoor

Wall-Mount Split, Residential

Indoor

Mitsubishi ceiling cassette

FIG. G.11 / Indoor

Modern Cassette, Flush-Mount

Outdoor

Mitsubishi Electric outdoor unit

FIG. G.12 / Outdoor

Mitsubishi Electric, Conduit Run

Mechanical Mitsubishi blower in closet

Mitsubishi blower in closet

FIG. G.13 / Mechanical

Blower Cabinet, Insulated

Mechanical Attic air handler installation

Attic air handler installation

FIG. G.14 / Mechanical

Attic Air Handler, Full Distribution

Outdoor

Refrigerant lineset copper work

FIG. G.15 / Outdoor

Refrigerant Lineset, Brazed Joints

Indoor

Large equipment cabinet

FIG. G.16 / Indoor

Galvanized Cabinet, Mechanical Bay

Outdoor

Exterior conduit runs

FIG. G.17 / Outdoor

Conduit Runs, Exterior Routing

Mechanical Attic distribution pathway

Attic distribution pathway

FIG. G.18 / Mechanical

Attic Distribution, Structural Pathway

Outdoor

Navien tankless water heater

FIG. G.19 / Outdoor

Navien Tankless Water Heater

Team

Technician on commercial rooftop

FIG. G.20 / Service

Commercial Rooftop, Refrigerant Service

Outdoor / Team Three HVAC technicians stand in front of a service van with the side door open.

Three HVAC technicians stand in front of a service van with the side door open.

FIG. G.21 / Team

Onzone Team On call

You may be interested

View all

Spring HVAC Prep for Bay Area Homes

Maintenance Jun 8, 2026

Spring HVAC Prep for Bay Area Homes

Wine Cellar Refrigeration: Bay Area Homeowner Guide

Refrigeration Jun 7, 2026

Wine Cellar Refrigeration: Bay Area Homeowner Guide

N.04 / CONTACT

Thank you for your interest in Onzone Heating & Cooling.

(650) 698-7979
support@onzone-ca.com
Open 24/7 — emergency dispatch anytime.