Most of the calls we get from Calistoga fall into one of two categories. There are the one-time calls: a system that stopped working, a repair that needs to happen before the weather shifts, a replacement that has been put off long enough. And then there are the properties we hear from every year, where the owner knows the equipment, knows what it tends to do, and wants someone who will look at it properly rather than just clear the fault code and leave. Both are the kind of work we do well. We cover Calistoga for both.
Older homes in a town this size tend to carry the full history of their heating and cooling equipment. Some have had the same system for a long time and run it until something breaks. Others have had additions or layout changes that the original ductwork was never updated to handle. Landlords managing rental properties in the area have their own set of needs: a system down means a tenant without heat or cooling, and that does not wait for a convenient slot. Whatever the situation, we scope the job before we price it and confirm what is covered before anyone comes out.
When you call, the person who picks up knows the trade and can talk through what the system is doing before anything is scheduled. That conversation covers what you are seeing, what the equipment is, and what the visit will involve. From there, we confirm the scope and the price before the appointment is set. We are open every day from 7:30 AM to 10:00 PM, and that applies to the phone as much as to the work itself.
A system that is completely down is a different situation from one that is underperforming, and we treat it that way. If the heat has gone out and the house is not livable, or the cooling has stopped working during a stretch of hot weather, call us and we will work through the diagnostic on the call before scheduling. We take short-notice work and we will tell you what the schedule allows when you call. We do not promise a specific arrival window, but getting the system back up is the goal of the visit, not just a report on what is wrong.
For rental properties and commercial spaces, a system going down affects people who have to stay in the building. We can discuss scheduling around occupancy when you call, and we will confirm what the visit covers so there are no unexpected gaps in what gets looked at. The scope is settled before anyone arrives.
In a town where many homes have been standing for decades, the heating and cooling equipment inside them reflects that. Older furnaces and air handlers can be well past the point where parts are still made for them, which changes the conversation about repair versus replacement. When a system is old enough that sourcing components is genuinely difficult, we say so on the call rather than scheduling a visit that leads to a dead end. If a replacement is the better answer, we size the new equipment to the property as it actually is, not to whatever the original system was rated for.
Additions, converted spaces, and rooms that were never properly connected to the main duct system are common in older homes. A duct system that was designed for the original floor plan can leave parts of the property significantly under-served, and no amount of thermostat adjustment fixes that. We look at ductwork as part of a broader system diagnosis when the symptoms point to it, and we seal, repair, or reconfigure sections where the air distribution is the actual problem. Zoning and comfort-control systems are worth considering for properties where different areas of the home have genuinely different heating and cooling needs.
The cost of a heating or cooling job depends on what the diagnostic actually finds. A refrigerant leak, a failed component, an evaporator coil that needs cleaning or replacement, a heat exchanger that has to be inspected properly before anything else can be confirmed: each of those is a different scope, and the price follows the scope. What is hard to reach, what parts are needed, and whether a repair makes sense relative to the age and condition of the system all factor into what we tell you.
We do not quote a number before we understand the job. When you call, we talk through what the system is doing, ask what equipment is installed, and give you a clear picture of what the visit will cover and what it is likely to cost. Nothing is authorized without your agreement, and the repair or install scope is priced before the work starts. If the diagnostic changes what we thought the job was, we explain what was found and confirm the updated price before anything additional is done.
You do not need to know what is wrong before you call. Describing what the property is doing is enough. The call is where we figure out what the system is likely doing and what the visit needs to cover. If you can tell us whether it is a heating problem or a cooling problem, how long it has been happening, and what the system did the last time it ran normally, that shapes what gets looked at when someone comes out.
Have the make and model of the equipment available if you can find it. If you know whether the system is a heat pump, a gas furnace, a central AC, or a ductless mini-split, that helps narrow the conversation. If you do not know, that is fine too. We will ask the right questions. From there, we confirm the scope, the price, and the timing before the visit is set.
When the air inside the property is too dry in winter or too humid in summer, the HVAC system can be part of the solution rather than just the source of the problem. Whole-home humidifiers and dehumidifiers connect to the existing air handler and duct system, conditioning the air as it moves through the equipment. We assess whether the existing system can support the addition before recommending an approach, and we confirm compatibility on the call.
A cracked or failing heat exchanger is not something to guess at. It is the component that separates combustion gases from the air that circulates through the home, and a fault there is serious enough that a furnace should not run until it has been properly checked. If a furnace is producing symptoms that point toward a heat exchanger problem, the inspection is the first step, and we do not skip it to get to the repair faster.
An air conditioner that is running but not producing cold air is one of the more common calls we get. The causes range from a refrigerant leak to a frozen evaporator coil to a failing compressor component, and each one produces similar symptoms while requiring a different fix. We work through the diagnostic in order rather than defaulting to the most common explanation, and we confirm the repair price before any work is started. Evaporator coil cleaning is part of the diagnostic where restricted airflow or reduced capacity is part of the symptom.
The mild winters across this region make heat pumps a genuinely efficient fit for year-round heating and cooling. A heat pump moves heat rather than generating it, which suits the temperature range the area sees most of the year. For homes replacing an aging gas furnace, a heat pump handles both heating and cooling from a single system. For homes without existing ductwork, a ductless mini-split heat pump achieves the same result without requiring new duct runs. We size the equipment to the actual load of the property, and the scope is confirmed before installation is scheduled.
Wildfire smoke has become a seasonal reality across this part of California, and standard HVAC filters were not designed to capture the fine particulate matter it carries. A MERV-13 or higher-rated filtration upgrade addresses that gap, but it requires checking that the air handler can move air through the denser media without a pressure drop that strains the blower. Where the existing system can support it, we upgrade the filter housing or media. Where it cannot, a whole-house filtration unit installed in the duct system is the appropriate path. We confirm air handler compatibility before recommending an approach. The wider scope of the work is on our services page.
We serve Calistoga and the communities nearby throughout Napa County and beyond. That includes Deer Park, Angwin, St. Helena, Larkfield-Wikiup, and Santa Rosa. If your property is in Calistoga or one of the surrounding towns and you are not sure whether your address is within the area we cover, call and ask.
Residential homeowners, landlords, and commercial property owners across the area all call us for the same range of heating and cooling work. The visit is scoped the same way regardless of the property type, and the price is confirmed before anyone comes out.
Yes. If you have received a replacement quote from another company and want to understand whether it reflects what the job actually requires, call us. We can talk through what a replacement for your system type typically involves and schedule a diagnostic visit to assess the equipment ourselves. The scope and the price are confirmed before any work is agreed.
We cover Calistoga and the surrounding communities, including Angwin, Deer Park, and St. Helena. If your property is in one of those towns and you want to confirm coverage before scheduling, call us and ask. The visit is scoped and priced the same way regardless of which town the property is in.
In some cases, yes, depending on what the fault is and what the system can safely do in the meantime. We assess whether a temporary measure is appropriate during the diagnostic visit and let you know what the options are. We do not leave a system in a condition that could cause further damage or create a safety concern while a part is on order.
Call us and describe the properties and their locations, and we will confirm what scheduling options are available across multiple addresses given the current calendar. We work with property managers on this kind of coordination regularly. The logistics are confirmed on the call.
We are open every day from 7:30 AM to 10:00 PM. If the system goes down outside those hours, call us as soon as we open and describe what the system was doing before it stopped. The more detail you can give on the call, the better prepared the visit will be. We take short-notice work and will tell you what the schedule allows when you call.
Clear access to the air handler, the outdoor unit, and any attic or crawl space access points before the visit. Replace the filter if it has not been changed recently, or let us know if you want the filter change included in the visit. If there are pets in the home, keep them away from the equipment areas during the visit. Let us know about any access complications when you call.
The visit starts with a full diagnostic before any repair is quoted. If the system is old enough that parts are difficult to source, or if the cost of the repair is close to the cost of a replacement, we explain that clearly before any work is authorized. Load calculations for a replacement are done to the property as it is now, not to the original system, so the new equipment is sized correctly for the space.
You do not need to know what is wrong before you call. Describing what the property is doing is enough, and the person who picks up can help you work out what the next step looks like.
Call Windsor HVAC Company at (707) 892-4623.
We are open every day from 7:30 AM to 10:00 PM. Give us a call and we will take care of it.
Heating and cooling service reaches these neighboring areas too: St. Helena, Larkfield-Wikiup, Healdsburg, Rohnert Park, Clearlake.
See the whole of our full area list.
From a quick repair call to a full system replacement, we cover the heating and cooling work that Calistoga and Napa County homes actually need. The list below breaks down each service by what it covers, who it fits best, and a practical note worth knowing before you call. If you have a question about a specific situation, call us and we will talk through what makes sense for your home or building.
| Service Type | What the Service Includes | When You Need It | Helpful Details |
|---|---|---|---|
| First-Time AC & Ductless Cooling Installation |
| Homes built without central air conditioning that are adding cooling for the first time | A home with no duct system, or with ducts not worth extending, is often a better fit for a ductless mini-split than for a new central system. |
| HVAC System Installation & ReplacementMost Popular |
| Homeowners, landlords, and property managers replacing aging or failed equipment | Load calculations determine the right equipment size for the space. Undersizing and oversizing both cause comfort and efficiency problems. |
| AC Repair & Service |
| Homes with a system blowing warm air or failing to start | A frozen evaporator coil or refrigerant issue can look identical from the thermostat, so diagnosis comes before any parts discussion. |
Call us to talk through your situation and get a quote on the work your home or building needs.
(707) 892-4623