One call is all it takes to get started. You describe what the system is doing, or not doing, and we ask a few questions about the equipment and the property. From there, we confirm what the visit will cover, agree on a price, and get it on the schedule. By the end of the call, you know what is happening and when. That is how it works, whether you are dealing with a boiler that stopped firing, an air conditioner that runs but does not cool, or a system that has been limping along for a season too long.
We serve Stamford and the surrounding parts of Fairfield County, handling heating and cooling work for homes, rental properties, and commercial buildings across the city. Property managers overseeing multiple units and homeowners who have never had to call an HVAC company before get the same thing: a straight answer on the call, a price before anything is scheduled, and someone who knows the work when they arrive. Reach out and we'll work out what it needs.
When there is no heat and the temperature is dropping, or no cooling and the building has to stay occupied, waiting is not an option. We take calls around the clock, any day of the year, including weekends and holidays. There are no after-hours restrictions. Emergency no-heat and no-cool calls are handled the same way as any other: the job is scoped on the phone, the price is confirmed, and the visit is arranged. What can be scheduled is settled when you call.
A rental unit with a tenant in place, or a commercial space that cannot close for the day, needs scheduling that accounts for who is there and what they need. We work around occupied properties. That means coordinating access, confirming what the visit will involve, and making sure the person on-site knows what to expect. HVAC service booked around your schedule is not a slogan here. It is how the work gets arranged.
When a system reaches the end of its life, the instinct is to replace it with the same thing. That is not always the right answer. A unit sized to the original equipment spec may not match what the property actually needs now. Additions, renovations, changes in how the space is used, and years of ductwork that was never properly sealed all change the load the system has to handle.
Before a replacement is quoted, the job is scoped against what the property requires. That means looking at the distribution side as well as the equipment, because a correctly sized unit connected to leaking or undersized ducts will underperform the same way the old one did. The goal is a system that handles the actual load, not one that matches the nameplate of what came out.
This matters especially in a city where the housing stock runs the full range, from older multi-family buildings with steam heat and no ductwork at all, to newer construction with central heat pumps and smart controls. The replacement conversation is different in each case, and we have it before anything is ordered.
Weak or missing airflow at the vents usually points to one of a few things: a filter so restricted it has cut off supply, a blower motor that is starting to fail, or ductwork that is leaking conditioned air before it reaches the room. The diagnostic visit traces the symptom to its source rather than replacing parts on a guess.
Uneven temperatures between rooms are a related problem but not always the same one. A room that is always too warm in summer and too cold in winter often has a distribution issue, a duct that is undersized, disconnected, or dampered incorrectly, rather than an equipment fault. Fixing the equipment without addressing the duct does not fix the room.
An air conditioner that runs but will not cool is one of the more common calls we take. The system sounds like it is working, the blower is moving air, but the temperature never drops. Refrigerant leak diagnosis is the first step when the charge is suspect, because adding refrigerant to a leaking system is a temporary fix that does not address what is actually wrong. We find where the leak is before recommending a repair path.
A furnace that will not fire, a boiler that loses pressure overnight, a heat pump that runs in heating mode but delivers cool air: these are no-heat calls with different causes, and the diagnostic visit identifies which one is in front of us. The Northeast's housing stock means boiler faults are as common here as furnace faults, and we handle both.
Unusual noise from equipment is worth paying attention to before it becomes a failure. A grinding sound from a blower motor, a banging from a boiler during a heating cycle, or a high-pitched squeal from a compressor all point to components under stress. Catching them early is less expensive than the repair that follows a complete failure.
If a system was worked on recently and the problem has come back, or if you want a second opinion before agreeing to a major repair or replacement, we will take a look at it. We are not starting from the assumption that the previous diagnosis was wrong. We are starting from the system in front of us.
We also take over work that was started and not completed, or where the original scope turned out to be larger than what was quoted. That conversation starts on the call. You describe what was done, what is still wrong, and what you were told the fix would involve. From there, we scope what is actually needed and give you a price before anything is scheduled.
No pressure and no gimmicks, just straight HVAC answers. If the repair that was done was the right one and something else has since failed, that is a different job. If the original diagnosis missed something, the diagnostic visit will find it.
The price is confirmed before we schedule, not after the technician has already been out. That means you know what the visit covers and what it costs before anyone comes to the property.
What moves a quote is what the diagnostic visit turns up. The fault itself, what has to be accessed to reach it, and whether repair or replacement is the better path are the three things that shape the final number. A refrigerant leak that requires tracing a line through a finished ceiling is a different job from one where the leak is at the service port. A boiler repair that requires draining the system is a different scope from one that does not. Those differences are explained before work is authorized.
Permits are handled where the job needs them. Requirements vary depending on the scope of the work and the municipality, and we confirm what applies to the address before anything is scheduled. The permit question is part of the job scope, not an afterthought.
Call (631) 623-9591 and ask what the visit covers. You get a straight answer.
We serve Stamford and the surrounding communities throughout Fairfield County. That includes Noroton Heights, Cos Cob, Noroton, Riverside, and Darien. If you are in the surrounding area and unsure whether your address is covered, call and ask.
The work across this part of Connecticut reflects what the housing stock demands. Older homes on steam or hot-water boilers, multi-family buildings that have never had central air, newer construction with heat pumps and ductless systems, and commercial properties running rooftop units through a building management system: all of it is familiar ground. Oil-to-gas and oil-to-heat-pump conversions are common across the region, and ductless mini-split installation is a practical answer for the older properties where running new ductwork is not realistic.
We cover the full range of heating and cooling work, residential and commercial, repair and installation, emergency and planned. The service page has the complete list. Call us and we'll get the air running right.
Adding a supply or return vent can help, but only if the duct system has the capacity to support it and the airflow is balanced correctly. A vent added without accounting for the rest of the system can create pressure imbalances that make other rooms worse. The right answer depends on a look at the whole system, not just the room in question.
Yes. If there are multiple things to look at on the same system or property, combining them into one visit is more efficient. Let us know on the call what all needs attention and we will scope the visit to cover it.
Ask what size the new system will be and how that was determined, whether the existing ductwork is compatible with the replacement unit, whether permits are required and how they are handled, and what the installation covers. Getting clear answers to those questions before agreeing to anything means there are no gaps in what you understood the job to include.
Yes. A filter replacement or thermostat swap does not have to be bundled with a larger service call.
Call us at (631) 623-9591 to describe what is needed and we will confirm the scope and price before booking.
A boiler heats the living space by circulating hot water or steam through radiators or baseboard units. A furnace heats air and pushes it through ducts to supply registers in each room. If your home has metal radiators, cast-iron baseboard units, or radiant floor heat, it is almost certainly a boiler system. If there are supply and return vents in the walls or ceiling and a filter somewhere near the air handler, it is a forced-air furnace. Both are common in Fairfield County, and both are jobs we handle.
If the ductwork, air handler, or refrigerant lines run through an attic or crawl space, access to those areas may be needed. Clear any stored items from the access hatch and make sure the path to the equipment is passable. We confirm what access is needed when the visit is scoped.
Older buildings in Stamford often have heating systems that were installed before central air was standard, which means no ductwork, no way to add it without significant renovation, and cooling that was handled by window units for decades. That is exactly the situation where a ductless mini-split makes sense, because it delivers heating and cooling to a specific space without touching the walls or ceilings of the rest of the building. Newer construction tends to have central systems that need maintenance and eventual replacement rather than a fundamental change in approach.
Yes. If you are planning a replacement before the system fails, booking ahead is a practical approach. We confirm the equipment, the scope, and the price before the date is set. Call us to find out what the schedule looks like.
The symptoms you describe on the phone shape what gets brought out.
When you call (631) 623-9591, we ask about the equipment, how old it is, what it is doing or not doing, and whether the problem is new or has been building.
By the end of the call, the visit is scoped, the price is confirmed, and the appointment is on the schedule. That is what Commack HVAC Company delivers for every property we serve, from a single-family home to a multi-unit building.
Also close at hand: Norwalk, Huntington Station, East Northport, Bridgeport.
Every heating and cooling job in Stamford comes with its own set of variables: the age of the equipment, how the home was built, and what the system has been doing before it stopped working right. The table below covers the services we handle across Fairfield County, who each one fits, and what is practical to know before you call. If a service you need is not listed or you are not sure which row fits your situation, a call gets you a straight answer.
| Service | Scope of Work | Common Needs | Helpful Details |
|---|---|---|---|
| Ductwork Repair & Sealing |
| Homes with uneven temperatures, rooms that never reach the set point, or rising energy bills without a clear cause | Leaky ducts push conditioned air into wall cavities and attic spaces. Sealing the connections is often the fix for comfort problems a new thermostat alone will not solve. |
| Seasonal Maintenance & Tune-Ups |
| Homeowners who want to catch developing problems before the peak heating or cooling season | Scheduling a tune-up before the season means fewer emergency calls and a system that is ready when it is needed most. |
| Full System Installation & ReplacementMost Popular |
| Homeowners replacing an aging or failed system, or upgrading to a more efficient setup | A system's age and repair history both belong in the replacement decision. We scope the job on the call and confirm the price before anything is scheduled. |
Call us at (631) 623-9591 any hour, any day, and we will walk you through what the system needs and what the visit will cover.
(631) 623-9591