We started in Windsor in 2004 with a simple idea: give local homeowners and businesses a heating and cooling contractor they could actually count on. One job at a time, one satisfied customer at a time, we built a reputation in this community that we are proud of and work hard to maintain every single day.
We live and work in this community, and our work shows it. When you call us, you are reaching someone who knows Windsor, who has worked in homes and commercial buildings all across Sonoma County, and who cares about getting your system running right. That kind of local accountability matters to us.
Over the years, we have grown to serve residential homeowners, rental property managers, small business owners, and commercial clients throughout the county. The work ranges from a single-room ductless installation to a full commercial HVAC overhaul, and we bring the same level of attention to every one. When something is not working right, we track down the problem fast.
From aging systems to brand-new installs, we handle the full range of residential and commercial HVAC work. Whether your air conditioner stopped cooling on the hottest day of the year, your furnace is making a noise it should not be making, or you are ready to upgrade to a more efficient heat pump system, we are the crew to call. No pressure and no gimmicks, just reliable comfort delivered by technicians who know what they are doing.
Below is a look at what we do and what you can expect when you call us.
Windsor's warm inland summers mean your air conditioner works hard for months on end. When it stops cooling the way it should, or stops working altogether, same-day AC repair is often available to get your home back to a comfortable temperature quickly. We diagnose condenser and compressor issues, address evaporator coil problems, and sort out airflow trouble that leads to uneven temperatures from room to room.
We also offer seasonal AC maintenance and tune-ups before the heat arrives so your system is ready when you need it most. A well-maintained air conditioner runs more efficiently, lasts longer, and is far less likely to quit on a 95-degree afternoon. We'll get your home comfortable again fast.
Windsor winters are mild compared to much of the country, but cold nights still arrive, and a heating system that is not working right makes those nights uncomfortable. We handle heating repair, furnace service, and emergency no-heat calls with the same urgency we bring to summer cooling work. Same-day heating repair is often available when you need it.
Heat pump installation is one of the most practical upgrades available to Sonoma County homeowners right now. Heat pumps provide both heating and cooling from a single system, operate efficiently in the mild coastal and inland climate this region sees, and reduce dependence on natural gas. Whether you are replacing an older furnace, adding cooling to a home that does not have it, or looking for a more energy-efficient setup, a heat pump is worth a serious look. We assess your home, explain your options, and give you a clear picture of what the work involves before anything is scheduled.
Many older Windsor homes were built without central ductwork, and additions or converted spaces often end up without any HVAC coverage at all. Ductless mini-split systems solve that problem without the cost and disruption of running new ducts through walls and ceilings. A mini-split delivers heating and cooling directly to the space that needs it, with individual controls for each zone.
We install, service, and repair ductless systems throughout the area. If you are curious about whether a mini-split makes sense for your home or a specific room, call us for a quote and we will walk you through the options.
Leaky or poorly sealed ductwork wastes energy and leaves rooms that never quite reach the right temperature. We inspect, repair, and seal duct systems so your HVAC equipment delivers conditioned air where it is supposed to go, not into your attic or crawlspace.
Thermostat and smart-control installation is a straightforward upgrade that gives you better control over your comfort and your energy use. We install programmable and smart thermostats that work with your existing system and help you manage it more efficiently.
Indoor air quality is a real concern in Sonoma County, particularly during wildfire season when smoke and particulates push inside. We install whole-home air filtration systems, including MERV-13 and higher-rated filters designed to capture fine particles, so the air circulating through your home is cleaner and safer to breathe.
Whether it's a one-time repair or a full system replacement, commercial clients need a contractor who is reliable, communicates clearly, and does not disappear after the first call. We work with property managers, retail businesses, office buildings, and other commercial accounts throughout Windsor and the surrounding area.
Commercial HVAC systems take on heavier loads and operate on tighter schedules than residential equipment. We handle commercial AC repair, commercial heating repair, full system installation, and ongoing maintenance for businesses that cannot afford extended downtime. Prompt response, even for last-minute comfort calls, is something we take seriously on the commercial side of our work.
If you manage a property or run a business and need a dependable HVAC contractor you can call year after year, we are ready to talk.
Scheduling an HVAC tech shouldn't be complicated. Neither should understanding what the work is going to cost. Before we start anything, we assess the job, explain what we found, and give you a clear estimate so there are no surprises when the invoice arrives. If the scope changes once we are into the work, we tell you before we proceed, not after.
We know that HVAC repair costs and installation pricing can feel like a mystery when you are calling around. Our goal is to take that uncertainty off the table. We protect your floors and finishes while we work, and we leave the job site clean when we are done.
Call today and we'll set up your appointment.
Getting your HVAC system serviced is straightforward when you work with us.
That is it. No complicated process, no pressure to approve work you are not ready for.
We are not satisfied until your system is running the way it should and you are comfortable in your home or business. If something is not right after we have been on the job, we want to know about it and we will make it right. That is not a formal policy or a printed guarantee. It is just how we operate. Local businesses run on their reputation, and ours is built on doing the job correctly and standing behind it.
We are based in Windsor and serve customers across Sonoma County and the nearby communities that surround it. Our regular service area includes:
If you are in Windsor or anywhere in the county and need an HVAC technician near you, we are a local call away. We know the roads, we know the neighborhoods, and we show up ready to work.
We have been working in homes and commercial buildings across this area since 2004, so we understand the local climate, the age and construction style of the housing stock, and the seasonal patterns that drive heating and cooling demand here. That local knowledge means we come to a job with realistic expectations about what we are likely to find. It also means we know which systems and solutions hold up well in this specific environment.
We started with a simple idea: give Windsor and Sonoma County homeowners and businesses a heating and cooling contractor they could actually count on. More than two decades later, that is still the standard we hold ourselves to on every call. We are not satisfied until the system is running the way it should and the customer is comfortable.
If something is not right after we have completed a job, we want to know about it and we will make it right. That is not a printed policy. It is simply how a local business that depends on its reputation has to operate. Call us and we will get back out to you.
We show up on time, explain what we find before we start any work, and give you a straight answer about what the repair or replacement involves and what it costs. We do not push work that is not needed, and we do not disappear after the job is done. No pressure and no gimmicks, just reliable comfort.
Our technicians diagnose the system before recommending anything. If a capacitor failed and replacing it solves the problem, that is what we tell you. If the system has deeper issues that make repair a poor investment, we explain that honestly too. We give you the information you need to make a good decision, and we do not add work to pad a bill.
Yes. When we show up to a job, we come prepared and professional. We protect your floors and finishes while we work, and we leave the job site clean when we are done. That standard applies to every call, whether it is a quick repair or a multi-day installation.
We schedule with realistic travel and job-time buffers so we are not rushing from one call to the next. If a job runs longer than expected and your appointment window shifts, we communicate that rather than leaving you waiting without an update. Prompt response, even for last-minute comfort calls, is something we take seriously.
We do. When a job involves work outside our scope, such as the electrical circuit for a new system, we can point you toward reliable local tradespeople rather than leaving you to figure it out on your own. We are part of this community, and connecting customers with people we trust is part of how we operate.
Devco Heating and Air Conditioning is ready to help with whatever your heating or cooling system needs, from a quick repair to a complete system upgrade. Simple booking. Clear pricing. Reliable, lasting comfort.
Call (707) 892-4623 to schedule service or request an estimate. Same-day HVAC service and emergency heating and cooling repair are available when you need us most. Whether it is a routine tune-up or an urgent no-heat situation in the middle of the night, a real local technician is ready to help. Call us today.
We handle the full range of heating and cooling work for Windsor homes, rental properties, and commercial spaces throughout Sonoma County. From a quick AC repair to a full heat pump electrification project, every job gets the same careful attention from start to finish. The table below lays out what each service covers, who it fits best, and a practical note to help you figure out where to start. Call us when you are ready and we will get you scheduled.
| Service Type | What's Included | Best Suited For | Helpful Details |
|---|---|---|---|
| Seasonal Maintenance & Tune-Ups |
| Homeowners and property managers who want to stay ahead of breakdowns | Regular maintenance extends equipment life and catches small problems before they become expensive ones |
| Ductwork Repair & Sealing |
| Homes with uneven temperatures, high energy bills, or weak airflow in certain rooms | Leaky ducts are one of the most common hidden reasons a system works harder than it should |
| First-Time AC & Ductless Cooling Installation |
| Windsor homes built without central air that are adding cooling for the first time | Ductless mini-splits are often the faster, less invasive path for homes without existing ductwork |
| Heat Pump Electrification |
| Homeowners ready to replace separate heating and cooling systems with a single electric heat pump | Modern heat pumps handle Windsor's temperature range well and are more efficient than older split systems in many cases |
| Indoor Air Quality & Air Filtration |
| Households concerned about allergens, dust, or smoke particles in the air they breathe | Especially relevant in Sonoma County during wildfire season when outdoor air quality drops quickly |
| Wildfire-Smoke Air Filtration (MERV-13+) |
| Sonoma County households that want cleaner indoor air during fire season | Standard residential filters do not capture fine smoke particles; we assess your system before recommending an upgrade |
| Ductless Mini-Split Installation |
| Room additions, converted garages, or any space where running ducts is not practical | Mini-splits condition individual zones independently, which can reduce energy use in spaces that are not always occupied |
| Heat Pump Repair & Installation |
| Homeowners with an all-in-one heating and cooling system that has stopped working correctly | Windsor's mild winters are well-suited to heat pump performance year-round |
| Full System Installation & ReplacementMost Popular |
| Homes or commercial spaces with aging, frequently failing, or undersized HVAC equipment | Correct sizing from the start prevents short-cycling and uneven comfort; we handle residential and commercial jobs |
| Heating & Furnace Repair |
| Homes or light-commercial spaces that have lost heat or are blowing cold air | We give you an honest repair-versus-replace assessment before any work begins |
| AC Repair & Service |
| Homeowners whose AC has stopped cooling or is short-cycling | Same-day availability for urgent no-cool situations; we carry common parts to finish most repairs in one visit |
| Emergency HVAC Service |
| Any situation where the system has gone down and waiting is not an option | Call us and we will give you an honest answer about how soon we can get someone to you |
| Thermostat & Smart-Control Installation |
| Homeowners who want better control over comfort and energy use | A smart thermostat like Nest or Ecobee can improve how your system responds without replacing the equipment |
How do I know whether my system needs a repair or a full replacement?
Age and repair history are the two biggest factors. If your system is under 12 to 15 years old and has not needed frequent repairs, a targeted fix usually makes sense. If it is older, has broken down more than once in recent seasons, or is struggling to hold temperature even when it is running, replacement is often the smarter investment. We walk you through both options and give you our honest read before any work begins.
What are common signs that my AC or furnace is starting to fail?
For an air conditioner, watch for warm air from the vents, short cycling on and off, unusually high energy bills, ice forming on the unit, or strange noises during operation. For a furnace, signs include cold air blowing from the vents, the system failing to ignite, uneven heat across rooms, or a burner that keeps shutting off. Any of these is worth a call so we can take a look before a small problem becomes a larger one.
Why is one room in my home hotter or colder than the rest?
Uneven temperatures usually point to one of a few causes: leaky or undersized ductwork, a blocked or closed vent, a system that is not sized correctly for the home, or a zone control issue. We inspect the system and the ductwork to find out what is actually happening rather than guessing. In some cases, a ductless mini-split added to the problem room is the most practical fix.
Same-Day and Emergency Availability
When your heating or cooling system goes down, we make it a priority to get someone out to you quickly. Same-day service is often available, and we respond to emergency no-heat and no-cool calls because comfort problems do not follow a convenient schedule.
What does a seasonal tune-up actually include?
A tune-up is a thorough inspection and service visit, not just a filter swap. For a cooling tune-up, we check refrigerant levels, inspect the coil and condenser, test electrical components, verify airflow, and confirm the thermostat is communicating correctly. For a heating tune-up, we inspect the heat exchanger, test ignition and burner operation, check the flue, and look at the blower and controls. The goal is to catch anything that could cause a breakdown before it does.
How often should I schedule HVAC maintenance?
Once a year at minimum, and twice a year if you are running both heating and cooling equipment through the seasons. A spring visit before cooling season and a fall visit before heating season is the standard we recommend. Regular maintenance keeps the system running efficiently, extends its useful life, and gives us a chance to catch small issues before they turn into emergency calls.
What can strange noises from my HVAC unit mean?
Different noises point to different problems. A banging or clanking sound often means a loose or broken component inside the unit. A high-pitched squealing can indicate a worn blower belt or a bearing that is starting to fail. Clicking at startup or shutdown is usually normal, but clicking that continues during operation can signal a relay or control problem. Grinding noises are worth taking seriously right away. If something sounds wrong, call us so we can diagnose it before it causes further damage.
Transparent Upfront Pricing
We gather the details about your system and your situation before quoting, and we give you a real number for your specific job before any work begins. If something unexpected comes up once we are into the job, we tell you before we continue.
How do ductwork leaks affect my energy bills and comfort?
When conditioned air escapes through gaps in your ductwork before it reaches the rooms you are trying to heat or cool, your system has to run longer to compensate. That means higher energy bills and uneven comfort throughout the home. In some cases, duct leakage is significant enough that sealing the ducts delivers a noticeable improvement in both comfort and efficiency without replacing any equipment.
Is same-day or emergency service available for no-heat or no-cool situations?
Yes. We offer same-day service for urgent heating and cooling situations, and emergency response when the system has gone down and waiting is not an option. When you call, we will ask a few questions to understand what is happening and give you an honest estimate of how quickly we can get someone to you.
Clean and Respectful Workmanship
We protect your floors and finishes while we work, and we leave the space clean when we are done. Work performed by qualified HVAC technicians is our standard on every job, whether it is a quick repair or a full system replacement.
Do I need to be home when the technician comes out?
For most service calls and installations, yes, someone should be home to provide access to the equipment and to hear the technician's findings and recommendations. If you manage a rental property and need to coordinate access differently, let us know when you call and we will work out a practical arrangement.
What does upgrading to a smart thermostat actually involve?
We assess whether your existing HVAC system is compatible with the smart thermostat you are considering, handle the low-voltage control wiring on the equipment side, and configure the new thermostat so it communicates correctly with your system. Most installations are straightforward and completed in a single visit. A smart thermostat gives you better scheduling control and can help the system respond more efficiently to how you actually use your home.
Why is wildfire-smoke air filtration worth thinking about in Windsor?
During fire season, fine smoke particles can move through a standard residential filter and circulate through your home. MERV-13 and higher-rated filters are designed to capture those smaller particles, but not every HVAC system can handle the added resistance without losing airflow. We assess your equipment first, then recommend the right combination of upgraded filtration, whole-home air purifiers, or air scrubbers based on what your system can support and what your household needs.
Call us at (707) 892-4623 and we will help you figure out exactly what your system needs and get you scheduled.
(707) 892-4623