HVAC Services in San Ramon: Air Conditioning, Furnaces, Heat Pumps & Much More

San Ramon's Heating, Cooling & Energy Efficiency Authority

For those that call San Ramon their own cozy corner of Contra Costa county, there is a lot to love about this quiet suburb of the Bay Area. From cheering on local hero Khalil Mack or tailgating for the Raiders during the fall and winter, to driving the kids to the BMX track at Memorial Park after a long summer day’s work, the safety and affordability of San Ramon make life’s other pleasures that much sweeter. 

But what happens when you arrive back home after a hot summer day to find your air conditioner isn’t blowing cold air, or your cooling costs have skyrocketed and you can’t seem to figure out why? Keeping a comfortable, energy efficient home here in San Ramon will require a lasting relationship with a trusted HVAC heating and cooling contractor — which is exactly what Hassler Heating and Air Conditioning is here for!

A Bay Area Contractor You Can Trust

When you are looking for HVAC repair near you,  you want to know the contractor you call will show up on time and diagnose your heating and cooling issue quickly and accurately, without selling you something you don’t need. 

At Hassler, we are dedicated to exceeding expectations with accountability, honesty, and leadership, and strive to develop a lasting relationship with each of our San Ramon customers. 

This is what makes up  The Hassler Difference — we do our best to embody each of those traits on every job, including:

• HVAC installation
• Furnace and air conditioner service and maintenance
• Ductless air conditioner and heat pump installation
• Tankless water heater installation
• Crawlspace and attic insulation
• Other home energy upgrades

Schedule your next HVAC service in San Ramon today when you call (510) 255-1550.

Customized Whole Home Solutions 

Even if two homes were designed to be identical, they have likely been lived in very differently over time. Making the homes of San Ramon more comfortable, energy efficient, and healthy will require customized approaches. We are here to help you find home performance upgrades and heating and cooling solutions that will keep you as comfortable as possible, reduce your heating and cooling costs, and increase your indoor air quality.

The best way to pinpoint the unique inefficiencies in your home is with an energy audit. Our home energy audits test your home from the basement to the attic, in order to get a comprehensive idea of how your home is performing. Using the latest in building science knowledge, Hassler will then come up with a comprehensive plan for how to move forward with your home performance upgrades. 

Keeping San Ramon Homes Cool with Premier Air Conditioning Repair, Installation & Maintenance Services

There's a meaningful difference between servicing AC systems in San Ramon and servicing them in, say, Berkeley or Marin. The San Ramon Valley doesn't get the afternoon marine layer. It doesn't cool down reliably at 4pm. When a heat wave parks over Contra Costa County, San Ramon homeowners feel the full weight of it, and a system that's marginal in a milder microclimate becomes a genuine problem here.

That context shapes how Hassler Heating and Air Conditioning approaches air conditioning in San Ramon. When we diagnose a system that's struggling to keep up, we're not just looking for the broken part — we're asking whether the system was ever correctly matched to this home's heat load in the first place. Plenty of equipment in San Ramon homes was sized for a gentler Bay Area climate and has been fighting above its weight class since day one.

What we handle: Capacitor and contactor failure, refrigerant leaks, frozen coils, blower motor issues, condensate drain problems, thermostat and control board diagnostics. Most repairs are completed same-day from a fully stocked service vehicle, and you'll have a written quote in hand before we touch anything.

Beyond repair, we install and maintain central AC systems, and we size everything with an actual Manual J load calculation rather than a square-footage estimate. If your system is aging past 15 years or facing a repair that approaches the cost of replacement, we'll tell you honestly which direction makes more financial sense — and point you toward the California rebates and federal credits that may apply.

Furnace & Heating Services in San Ramon

San Ramon's winters don't get headline-level cold, but the Valley cools down sharply after sunset, and a furnace that's been coasting on deferred maintenance for a few seasons has a way of choosing the first genuinely cold week to stop cooperating.

Hassler Heating and Air Conditioning handles the full range of heating services for San Ramon homeowners, including diagnosis and repair, replacement installations, and preventative maintenance before problems develop. Our technicians are direct with findings: if your heat exchanger is cracked, we'll tell you what that means for your family's safety and walk you through the options without steering you toward the more expensive one out of habit. If a repair makes sense, we'll make it. If replacement makes more sense, we'll show you the math.

For furnace replacements, we install high-efficiency equipment from manufacturers we've found to be reliable in this climate and stock parts for locally. We pull required permits, handle commissioning, and don't leave until the system has run a complete cycle and you understand how to operate it. Annual fall maintenance, which includes heat exchanger inspection, burner cleaning, igniter and flame sensor testing, and filter swap, is available through our VIP Club Membership, which also covers your spring AC tune-up and gets you to the front of the line when something urgent comes up.

Heat Pumps & Ductless Mini-Split Installations

The pitch for heat pumps in San Ramon is straightforward: one system handles both your heating and cooling, runs entirely on electricity, and right now qualifies for more financial incentives than at any point in recent memory. For a homeowner whose furnace and AC are both aging, replacing them separately over the next few years costs more — in equipment, labor, and missed rebate eligibility — than addressing both at once with a heat pump.

Hassler Heating and Air Conditioning has guided more East Bay homeowners through gas-to-electric heat pump conversions than just about anyone in the region, and has helped our customers collectively claim over $5 million in rebates and incentives in the process. 

Here's what's currently available to San Ramon homeowners:

• The IRA 25C Federal Tax Credit covers 30% of your installed heat pump cost up to $2,000 annually, and it resets each year, which matters if you're phasing upgrades over time. 
• TECH Clean California adds $1,000 per indoor unit for installations that replace fossil fuel heating, applied at the point of sale by us as an enrolled contractor.
• BayREN contributes up to $500 for qualifying fuel-to-heat-pump conversions. Stack those together and the net cost of a well-chosen heat pump installation looks considerably different than the sticker price suggests.

For rooms or additions that central ductwork doesn't serve well, such as converted garages, home offices that overheat in the afternoon, or a master suite that never quite matches the rest of the house, ductless mini-split systems are often the cleanest solution: no new ductwork, independent zone control, and eligible for the same rebate programs as whole-home installations.

Breathe Easier with Our Indoor Air Quality Solutions

San Ramon sits in a bowl. That geography, combined with I-680 traffic, summer ozone, and increasingly frequent wildfire smoke events drifting in from fires across Northern California, means the air quality in and around the San Ramon Valley is meaningfully different from what Bay Area weather reports typically describe. On still summer days, particulate levels in the Valley can be significantly elevated even when the rest of the region looks clear.

Inside the home, the standard 1-inch HVAC filter provides partial protection at best — it catches larger particles but lets fine particulate matter, the category most associated with respiratory health effects, pass through largely unimpeded. Leaky ducts compound the problem by pulling unfiltered air from attics, crawlspaces, and wall cavities and routing it directly into living spaces.

The most effective approach to indoor air quality in a San Ramon home typically combines a few elements: a whole-home air purifier or upgraded media filtration system that captures fine particulates, duct sealing to eliminate the infiltration pathways that bypass filtration entirely, and air sealing of the building envelope to reduce how much outdoor air enters uncontrolled in the first place. For homes with persistent stuffiness or humidity concerns, a heat recovery ventilator brings in controlled, filtered fresh air without the energy penalty of simply opening a window.

Not every home needs everything. We can assess your current setup and tell you which of these makes the most sense for your home's specific conditions.