Serving Petaluma & the North Bay

Santa Rosa · Sonoma County

HVAC Contractor in Santa Rosa, CA

Heating, cooling, and a clear next step for your home or business. Serving Santa Rosa from our Petaluma base.

Central air conditioning unit on a concrete equipment pad
Serving Santa Rosa

Heating and cooling in Santa Rosa

We serve homes and businesses throughout Santa Rosa, including Rincon Valley, Roseland, and the Sebastopol Road corridor. Our Petaluma team handles repairs and maintenance for existing systems as well as heating and cooling installations.

A property with an existing central system may need a focused repair, while an addition or a room used as an office may benefit from a separate ductless zone. Tell us how the space is used and which rooms are difficult to keep comfortable. We can evaluate the equipment and the distribution together.

How we can help

HVAC services in Santa Rosa

A cooling problem in one room and a system that has stopped working throughout the property need different evaluations. Explore the service that matches your concern, or describe it when you call.

Repair & diagnosis

When heating or cooling changes unexpectedly, start with an evaluation of the symptoms, equipment, and controls.

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Installation & replacement

Compare system options with attention to the rooms, existing distribution, placement, and project goals.

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Maintenance & tune-ups

Plan care around the actual equipment and its instructions, with repairs explained separately when needed.

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Plan access and scope before choosing equipment

For a Santa Rosa property in Rincon Valley or Roseland, a remodel or converted room is a useful reason to revisit how the existing system serves the floor plan. Describe the changed space, current equipment, and the time of day comfort falls behind. A separate zone may be an option, but it should be compared with the whole-system arrangement.

Santa Rosa’s Building Division handles mechanical, electrical, and energy-code review. For an installation, ask the proposal to identify which approvals and supporting work apply to the actual scope. A retail space along Sebastopol Road also needs a plan for access and interruptions while the business is occupied.

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Planning your visit

Planning access in Santa Rosa

If the equipment serves a business, identify who can approve work and provide access to roof or mechanical areas. At a home, let us know about side gates, pets, and the location of indoor equipment. Include parking or entry instructions if the equipment is not accessible from the main entrance.

Our coverage also includes the broader North Bay, Marin County, Napa County, and San Francisco. If your property is outside Santa Rosa, call with the address to discuss service.

Can you look at one room that stays hot?

Yes. A room-specific concern can involve the supply and return arrangement, controls, or the room’s heating and cooling needs. We can compare correcting the existing system with other options rather than assume the entire unit needs replacement.

What should a Santa Rosa installation estimate include?

It should identify equipment, controls, installation access, removal if applicable, and supporting work. Ask who handles required permits and inspections and what work is outside the proposal, especially when the HVAC change is part of a remodel.

Compact outdoor unit beside a wooden deck
Equipment location considered alongside the usable outdoor space.
Wall-mounted outdoor unit with lines routed down an exterior wall
Wall mounting and line routing suited to the available exterior space.

Explore Diamond HVAC’s project photos

Explore all service areas
Repairs · New systems · Maintenance

Need a repair?
Planning a new system?

Tell us what’s happening with your heating or cooling. We’ll help you understand the next step and put together a clear estimate.

Get a Free Estimate (707) 762-7260 Based in Petaluma. Serving the North Bay.