Welcome to Downing Heating Inc.
Occidental Heating & Air Conditioning Experts!
Let us be your trusted partner for services, maintenance and installation of HVAC systems.
Serving Marin & Sonoma Counties Since 1984

Your Trusted Local HVAC Experts!
Serving Homes & Businesses in Occidental, CA Since 1984
For over three decades, Downing Heating, Inc. has been a trusted name in providing reliable heating and air conditioning services in Occidental, CA. Servicing Marin and Sonoma Counties, our expertise in Occidental AC repair and furnace repair is unmatched. When you need HVAC services —whether for maintenance, repair, or installation —look no further than our team of dedicated professionals. With a keen focus on customer satisfaction, we offer top-notch HVAC repair near you, catering to Occidental AC repair needs and beyond. Our Occidental emergency HVAC repair services ensure that you are never left in discomfort.
From diagnosing why your AC is not cooling to fixing why your furnace is not heating, our skilled technicians handle it all. As your go-to Occidental HVAC contractor, we specialize in delivering indoor air quality solutions to keep your environment healthy and comfortable. For businesses in the area, our team of Occidental commercial HVAC contractors is equipped to handle all your heating and cooling needs effectively. Trust Downing Heating, Inc. for all your HVAC requirements, where excellence meets experience, making your indoor environment just right.
OUR SERVICES
Occidental HVAC Services
Downing Heating, Inc. provides a dedicated Service Department to address all your Occidental heating and air conditioning requirements. We service every brand and model.
A/C Services
We offer expert AC repair, installation, and maintenance for all brands and models.
Heating Services
Keep cozy with our expert furnace repair, replacement, and maintenance services.
Indoor Air Quality
Experience effortless breathing with our solutions for fresh, healthy air in your home.
Commercial Services
Our team handles all commercial HVAC repairs and installations for your business.
Air Conditioning Services
Professional Air Conditioning Solutions
Rely on our highly skilled technicians to deliver complete
AC solutions for your home or business. We excel in repairing, maintaining, and installing energy-efficient cooling systems across Occidental, Marin, and Sonoma County.
No Tricks, No Obligation, Free Quote!
Avoid the hassle of starting a project with unrealistic guarantees!
Call us today: (415) 485-1011 or (707) 794-6100 visit the contact us page for additional contact info.
Heating Services
Expert Heating Solutions near Occidental, CA
Trust our expert team for all your heating needs. We provide professional, reliable solutions from furnace repair and maintenance to the installation of high-efficiency systems, ensuring your comfort all winter long in Novato, Marin & Sonoma County.
Breathe Easier
Occidental Indoor Air Quality Solutions
Keep your Occidental family safe with our air purifiers and humidifiers that reduce allergens and ensure clean air at home.

Sonoma Marin Local 104 Shop
Building Stronger Communities Together
Downing Heating, Inc. is a proud Union Shop with Smart Local No. 104, covering 49 California counties. It includes over 9,000 skilled craftspeople trained in producing, fabricating, installing, detailing, and testing sheet metal products and HVAC. When unions thrive, communities benefit. SMW Local Union 104 fosters job opportunities for members and their families, contributing to stronger and more equitable local areas through construction projects with trained workers, fair wages, and apprenticeship programs.
Commercial HVAC Services
Our team offers Occidentalc Commercial HVAC solutions for businesses of all sizes, from maintenance to full system installation, ensuring smooth operations.
Whole House Fans
Upgrade to a whole house fan for a quiet, energy-efficient way to cool your home. We expertly install and service these systems to lower your utility bills.
Automation Issue
Beware of Automated Quotes
There are many variables in the HVAC industry that can affect the price of a project, If you received an estimate within a few clicks, something could be wrong. ​
01.
Automated systems are not able to accurately chose a piece of equipment for a space.
02.
The pricing may be inflated to cover unforeseen conditions that may or may not be present.
03.
There is no site visit to determine conditions of space or efficiency need, etc.
Contact Us for a Free, Accurate Project Estimate.
Upgrade your equipment & get rebates!
Get Rebates by Plugging into Electrify Marin County
Reduce greenhouse gas emissions by swapping out gas and propane equipment. Did you know that our union offers rebates on new equipment and maintenance services?
client reviews
Words From Our Customers

Downing Heating, Inc. SERVICE AREA
Proudly Serving Occidental & Beyond
We are licensed, local, and experienced in handling projects
Downing Heating, Inc., a locally owned business, has provided reliable
HVAC services for several decades. We are the trusted choice for Occidental residential and commercial heating and air conditioning needs in
Marin and
Sonoma Counties.
We service all HVAC makes and models.

HVAC Questions Answered
Frequently Asked Questions
How often do I need to change my air filters?
Once a month is a pretty good rule of thumb for most people. Depending on where you live and how much dirt, pet dander, and other contaminants are present, the answer could be more or less. Check your filter frequently to determine if it’s dirty. If it is, change it.
What size AC unit do I need?
There’s no easy answer for this one. A lot of factors will go into what size heating and cooling unit you’ll need. The type of house you own, its walls, insulation, attic space, and more can go into determining what size unit is required. A system that is too large could result in a home that’s too humid, causing problems with moisture and mold. A system that is too small will run constantly, running up your energy bill. Only a qualified heating and cooling technician can determine what size unit is best for your home.
Should I cover my AC unit in the fall and winter?
While covering your unit can prevent unwanted debris from accumulating on the unit, it can also cause problems if you try to operate it with the covering in place. If you’re going on a long trip and plan to turn the unit off while you’re gone, feel free to cover it up. Just make sure you disconnect the power source before leaving.
Why should I replace my R-22 outdoor unit with an R410A?
R-22 refrigerant and equipment are being phased out as Montreal Protocol regulations intended to reduce the impact on ozone take hold. As time passes, replacement parts and refrigerants for old R-22 units will become harder to find and more expensive, so replacing your unit now can save you some headaches in the future.



























