Our Service Areas

HVAC Services in Danville

Danville's Trusted Heating, Cooling & Energy Efficiency Contractor

When you live, work, and play in the Heart of San Ramon Valley, you know the importance of living local. So whether you’ve been out with the kids at the Blackhawk Museum, getting back from a camping trip in the Las Trampas wilderness, or it’s just been another long week of school fundraisers and soccer games, Danvillians want to know the HVAC contractor they trust with their home performance is a local expert.

At Hassler, we couldn’t agree more with the Danville city motto of “Live Local,” which is why we offer our full catalog of HVAC services for Danville homeowners. From emergency heating repair in the dead of winter to installing a ductless air conditioner in the room you just added to your home, the team at Hassler are the Bay Area’s HVAC experts.

Why Hassler?

At Hassler Heating and Air Conditioning, we've built our reputation in Danville the same way most things worth having are built: one job at a time, done right. We're not a call center operation that dispatches whoever is available. We're a local East Bay contractor with deep roots in Contra Costa County, and our team treats every Danville home the way we'd want our own homes treated — with honest diagnosis, quality workmanship, and no pressure to approve work you don't need.

What separates Hassler Heating and Air Conditioning from other HVAC contractors in the area is our whole-home approach. We don't just swap out the part that broke and move on. We look at your home as a connected system — because that's what it is. An undersized AC, poorly sealed ducts, inadequate attic insulation, and an aging furnace all affect each other. When we diagnose a problem, we tell you what caused it, what fixed it, and what's likely to come next, so you can make informed decisions rather than reactive ones.

Call (510) 255-1550 or contact us online to schedule service in Danville.

We Have Your Heating & Cooling Needs Covered

From the historical Victorian to a new construction ranch style, Hassler Heating and Air Conditioning specialists work in every type of home. But we don’t just look at the symptoms of your home comfort woes, or attempt to only treat just one factor contributing to your high energy bills or uncomfortable home. The Hassler Difference is that we look at your entire home as a system, and are committed to exceeding expectations.

Our team specializes in HVAC installations, service and maintenance, crawlspace and attic insulation, as well as other energy efficiency upgrades that will increase the comfort, health, and value of your home. If you have been looking for a home air quality test to better understand the airborne particles in your air, we are Danville’s experts when it comes to air purifying and ventilation. We’ll make sure your indoor air quality is as high as possible throughout the smoky wildfire season and the year-long smog of rush hour.

Not sure which home performance upgrades your home will benefit from the most? Schedule a home energy audit with us and get the details you need to make informed decisions about your home comfort from the get-go!

Danville Air Conditioning Repair, Installation & Maintenance Services

Danville's inland location in the San Ramon Valley means summer heat that routinely outpaces what the rest of the Bay Area deals with. When your AC fails in July or August, you feel it immediately — and so does your family. Hassler Heating and Air Conditioning offers fast, reliable air conditioning service throughout Danville with same-day service availability on most calls.

Air Conditioning Repair

Our technicians diagnose and repair all makes and models of central air conditioning equipment. The most common failures we see in Danville homes include capacitor and contactor failure, refrigerant leaks, frozen evaporator coils, blower motor issues, and thermostat malfunctions. We arrive with fully stocked service vehicles and resolve the majority of repairs in a single visit. We provide a written, upfront quote before any work begins — no surprises on the invoice.

AC Installation & Replacement

If your system is aging past 12–15 years, facing a major component failure, or simply can't keep pace with Danville's summer heat load, a replacement may be the smarter long-term investment. Hassler Heating and Air Conditioning installs high-efficiency central air conditioning systems sized specifically for your home using a proper Manual J load calculation — not a square-footage guess. We'll also walk you through available California utility rebates and federal tax credits that may significantly offset your installation cost.

AC Maintenance

Preventative maintenance is the most cost-effective thing you can do for your air conditioning system. A spring tune-up covers coil cleaning, refrigerant level check, electrical component inspection, condensate drain clearing, and airflow testing — all the things that, left unaddressed, turn into expensive mid-summer repairs. Ask about our VIP Club Membership for priority scheduling and annual maintenance coverage.

Heating & Furnace Services in Danville

Danville winters are mild, but the damp cold that settles into the San Ramon Valley on winter evenings is real — and a furnace that's struggling to keep up makes it more noticeable. Hassler Heating and Air Conditioning provides complete furnace repair, installation, and maintenance services for Danville homeowners.

Furnace Repair

From a furnace that won't ignite to one that cycles on and off without reaching temperature, our technicians diagnose heating problems accurately and fix them efficiently. Common furnace repairs include igniter and flame sensor replacement, heat exchanger inspection, blower motor service, gas valve repair, and control board diagnostics. If we find a cracked heat exchanger — a safety issue that allows combustion gases to enter your living space — we'll tell you clearly and explain your options.\

Furnace Installation & Replacement

When replacement makes more sense than repair, Hassler Heating and Air Conditioning installs high-efficiency gas furnaces from leading manufacturers. We handle sizing, installation, permitting, and commissioning, and we'll make sure you're aware of any rebates or incentives available for high-efficiency equipment upgrades. If your furnace is also approaching the end of its service life, replacing it at the same time as an AC or heat pump upgrade is often the most cost-effective path.

Furnace Maintenance

A fall tune-up before heating season covers heat exchanger inspection, burner cleaning, igniter testing, filter replacement, and a full system operational check. Catching problems in October is considerably less stressful than discovering them during the first cold snap in December.

Heat Pump Installation & Service in Danville: Upgrade Today!

Heat pumps have become one of the most popular HVAC upgrades among Danville homeowners — and for good reason. A modern heat pump replaces both your air conditioner and your furnace in a single, all-electric system that heats and cools more efficiently than the equipment it replaces. Danville's climate, with warm summers and mild winters, is well-matched to heat pump performance across both seasons.

Hassler Heating and Air Conditioning is the East Bay's leader in home electrification and heat pump technology. We specialize in gas-to-electric heat pump conversions and have helped Danville homeowners navigate the full process — equipment selection, sizing, installation, permitting, and rebate qualification — from start to finish.

Current incentives for heat pump installation in Danville include:

IRA 25C Federal Tax Credit: 30% of installed cost, up to $2,000 per year, for qualifying heat pump systems
TECH Clean California: $1,000 per indoor unit for installations replacing fossil fuel heating, applied at point of sale
BayREN Rebates: Up to $500 for qualifying fuel-to-heat-pump conversions

Hassler Heating and Air Conditioning is a TECH-Enrolled and BayREN Participating Contractor, and has helped East Bay customers secure over $5 million in rebates and incentives. We handle the rebate paperwork on your behalf. Learn more about heat pumps or call (510) 255-1550 for a free in-home estimate.

Ductless Mini-Split Installation in Danville

Not every room in a Danville home is served equally by central HVAC. A bonus room above the garage, a converted basement, a home office addition, or a bedroom on the south side of the house that bakes all summer — these spaces often need a targeted solution rather than a whole-system overhaul.

Ductless mini-split systems provide precise, efficient heating and cooling for individual zones without requiring ductwork. Each indoor unit operates independently, which means you're only conditioning the spaces you're actually using — a meaningful efficiency advantage over central systems that heat or cool the entire house to serve one occupied room.

Hassler Heating and Air Conditioning installs single-zone and multi-zone ductless mini-split systems throughout Danville, from Blackhawk to the downtown corridor. We size and configure each system for the specific characteristics of the space, and most installations qualify for the same TECH Clean California and federal rebate programs as whole-home heat pump installations.

The Hassler Difference

Hassler knows that getting the job done right today will lead to customers being our biggest advocates tomorrow.

Exceeding Expectations

Our philosophy on customer service is to not only meet expectations but to exceed them. Whether it is your home heating and cooling, improving your indoor air quality, or scheduling a home energy assessment, we are committed to over-delivering throughout your entire journey with Hassler.
Leadership
From our newest team member on up to our leadership and ownership, we are committed to producing the highest level of workmanship - all in an efficient manner. We accomplish this through better training, education, planning, and leadership across all the products and services we provide.
Accountability

We are committed to holding ourselves and each other accountable to integrity, customer satisfaction, and peak performance. We are unwavering in our commitment to not only talk about the solution, but to be a part of it.
Lasting Relationships
Developing long lasting relationships is at the core of our organization. When interacting with a customer or team member, we are committed to building mutual trust and respect. Our reputation is the foundation of the company, and at the end of the day, our word is all we have!
Growth

Through a dedication to training, education and leadership, we will continue to grow to remain the leading HVAC and home performance company in Contra Costa, Alameda, and Marin counties. We are continually honing our craft and challenging ourselves to improve who we are as an organization for what we can become.
Go Green
We care deeply about the changing climate here in California, and want to help other Californians reduce their impact on the environment. Hassler places an emphasis on embracing “Green” technologies and processes whenever possible, and reducing energy use.

Learn more

Indoor Air Quality Solutions for Danville Homes

The San Ramon Valley's air quality presents real challenges for Danville homeowners. Wildfire smoke has become a seasonal reality in recent years, summer ozone and particulate levels regularly spike during heat events, and Danville's position in the valley means still-air days trap pollutants at ground level. Inside the home, aging ductwork, inadequate filtration, and poor ventilation compound the problem.

Hassler Heating and Air Conditioning offers a comprehensive range of indoor air quality solutions for Danville homes, including:

Air Purifiers: Whole-home air purification systems that remove particulates, allergens, and airborne contaminants — including wildfire smoke — at a level that standard HVAC filters can't match.
Heat Recovery Ventilators (HRVs): Bring fresh outdoor air into your home while recovering the energy from outgoing stale air, improving ventilation without spiking your energy bills.
Duct Repair & Sealing: Leaky ducts pull air from unconditioned spaces — attics, crawlspaces, garages — and distribute it through your living areas. Duct sealing addresses the source rather than just filtering the symptoms.
Air Sealing: Closing the gaps in your home's building envelope reduces infiltration of outdoor pollutants, improves HVAC efficiency, and makes filtered indoor air stay filtered longer.
Filter Replacement: Regular filter service is the simplest and most overlooked element of good indoor air quality. We can set you up on a schedule that keeps your system running clean.

Go Green & Save Money with a Home Energy Audit in Danville

If your energy bills feel higher than they should be, certain rooms never quite reach a comfortable temperature, or you're planning a significant HVAC upgrade and want to make sure you're investing in the right things first — a professional home energy assessment is the right starting point.

Hassler Heating and Air Conditioning's energy assessments give you a complete, data-driven picture of how your home uses and loses energy. We test for duct leakage, assess insulation levels in your attic and crawlspace, identify air infiltration points in the building envelope, and evaluate your existing HVAC equipment's performance against your home's actual heating and cooling load. The result is a prioritized set of recommendations — not a sales pitch — so you can decide which upgrades deliver the most value for your situation.

Many Danville homeowners discover that attic insulation upgrades or duct sealing deliver immediate, measurable reductions in energy costs and noticeably improve comfort before any HVAC equipment is replaced. An energy assessment tells you where to start.

Emergency Services, Rebates, and Financing

Emergency HVAC Service

HVAC failures don't follow business hours. When your heating or cooling goes down unexpectedly, Hassler Heating and Air Conditioning offers emergency service to get your Danville home back to comfort as quickly as possible. Call (510) 255-1550 and we'll work to dispatch a technician to you the same day.

Rebates

Hassler Heating and Air Conditioning is an enrolled or participating contractor in multiple rebate programs, including TECH Clean California, BayREN, and others. We've helped East Bay homeowners secure over $5 million in rebates and incentives and handle the qualification and paperwork process on your behalf.

View current rebate opportunities

Financing

We offer multiple financing options to make HVAC upgrades and repairs accessible, including Property Assessed Clean Energy (PACE) financing, which allows qualifying Danville homeowners to finance energy-efficient improvements through their property taxes — with options that require $0 down and competitive interest rates.

Danville Heating & Cooling FAQ

Why does my home in Danville get so much hotter than the rest of the Bay Area?

Danville's position in the San Ramon Valley is the main reason. Unlike coastal Bay Area communities that benefit from marine influence and afternoon fog, Danville sits far enough inland that it heats up quickly and holds that heat into the evening. The surrounding hills trap warm air in the valley during the day, and the lack of a reliable sea breeze means your AC is working without the natural cooling assist that Oakland or Berkeley homeowners often get for free in the late afternoon. This is why correct sizing is so critical for Danville HVAC systems — a unit sized for a milder Bay Area microclimate will be consistently overwhelmed here. If your system runs constantly during summer heat events without reaching your thermostat setting, it may have been undersized from the start rather than simply malfunctioning.

How often should I change my HVAC filter in Danville?

More often than the manufacturer's default recommendation suggests, and more often than you would in a coastal Bay Area community. Danville's summer air quality — a combination of valley ozone, wildfire smoke season, and the dust that kicks up during dry spells — puts a heavier load on your filtration system than a typical Bay Area filter lifespan accounts for. During wildfire season especially, filters can clog in a fraction of the time it would take under normal conditions, and a severely restricted filter doesn't just reduce air quality — it starves your HVAC system of airflow, which strains the blower motor and can cause the evaporator coil to freeze. A good baseline for most Danville homes is every 60 days under normal conditions, dropping to every 30 days during active smoke events. Hassler Heating and Air Conditioning offers filter replacement service and can set you up on a maintenance schedule calibrated to your home and the season.

Is my Danville home a good candidate for a heat pump, or is it too hot here in summer?

Danville is actually a strong candidate for heat pump installation despite the inland heat. The concern about heat pumps in hot climates is usually about heating efficiency in extreme cold, not cooling performance in summer heat. On the cooling side, a properly sized heat pump performs comparably to a high-efficiency central AC system, and Danville's summer temperatures, while hot by Bay Area standards, are well within the operating range where heat pumps cool effectively. On the heating side, Danville winters are mild enough that a heat pump handles the load easily without supplemental heat. The combination of warm summers and mild winters is genuinely close to ideal for heat pump performance year-round. The more relevant question for most Danville homeowners isn't whether a heat pump will work here — it's whether the available rebates and long-term energy savings make the upgrade make financial sense for their specific situation. In most cases we evaluate, they do. Call (510) 255-1550 for an honest in-home assessment.

What's causing the hot and cold spots in different rooms of my Danville home?

Uneven temperatures throughout a home are one of the most common comfort complaints we hear from Danville homeowners, and the cause is almost never the thermostat setting. The most frequent culprits are duct leakage (where conditioned air escapes into unconditioned spaces like the attic or crawlspace before reaching the rooms that need it) and duct imbalance (where the system was never properly designed to distribute airflow evenly across all zones). Rooms on the south and west sides of the house that receive prolonged direct sun exposure in the afternoon are particularly prone to overheating in Danville's climate, especially if the ductwork serving those rooms is undersized or partially blocked. Inadequate attic insulation compounds the problem significantly: a poorly insulated attic above a second-floor bedroom essentially turns the ceiling into a radiant heat panel on a summer afternoon. The fix is rarely just turning up the thermostat — it usually involves a combination of duct testing and sealing, insulation upgrades, and in some cases adding zoning capability to the system. Hassler Heating and Air Conditioning can identify the specific cause with a proper diagnostic rather than guessing. Call (510) 255-1550 to schedule a visit.

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"Professional, efficient and responsive."
“We highly recommend Hassler Heating and AC. Three years ago, we updated our system with a heat pump. The installers were professional, efficient and responsive.”

- Diane M.
"The company provided great service."
“He quickly identified the problem, took time to explain it, answered my questions and got everything in working order under 2 hours that even included a trip back to El Cerrito to get the right part. He was very courteous and respectful.”

- Veronica A.
"He had us up and running very quickly."
“He had us up and running very quickly and also was able to make some other recommendations for service and maintenance. He was great, and I will continue to use him and his team for maintenance and repairs.”

- Scott L.
"I am so thankful."
“Hassler Heating went above and beyond customer service! My AC unit started smoking and I called to make an appointment and they were able to fit me into their schedule that day!”

- Emily V.
"I also want to commend your work crew."
“They were very efficient as well as pleasant in their interaction with me. They did such a good job that my next-door neighbor, after watching them at work, told me that he has decided to hire your firm to install a new heating system for his house.”

- Marilyn B.
"Very knowledgable."
“Chris just came out and inspected a furnace and ducting for me at a property that clients of mine are purchasing in El Cerrito. He was very knowledgable and was sure to take the time to answer all of my questions thoroughly.”

- Jeffery S.
"We have full confidence."
“We have full confidence that we now have a first class heating system that will serve us well in the years to come. We know in the future we will need to replace our roof mounted air conditioner, and we will confidently call on Hassler to do the job.”

- Tom R.
"Always professional."
“They squeezed a whole lot of equipment into a tiny attic without a single complaint. They also helped with all of the energy-saving rebates . The estimator, installers, and service guys have been great.”

- Sean M.

Schedule Your HVAC Service or Consultation in Danville Today

Whether you need a same-day repair, are planning a heat pump upgrade, or simply want to understand what your home needs to stay comfortable and efficient year-round, Hassler Heating and Air Conditioning is ready to help. Our Danville customers get the same whole-home expertise, honest recommendations, and commitment to quality that has made us the East Bay's trusted HVAC contractor for years.

Call (510) 255-1550 or contact us online to schedule your consultation in Danville. We look forward to earning your trust.

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