Greenwich HVAC Company handles heating and cooling for homes and businesses throughout Greenwich and the surrounding Fairfield County area. Whether you need a furnace repaired before the first cold night, an AC diagnosed in the middle of July, a heat pump serviced, or an emergency call taken care of quickly, we cover it. Residential and commercial calls are both welcome, and the scope of the job is confirmed before anything is scheduled.
Fast diagnosis. Pricing set out up front. Comfort restored.
Call for a quote: (475) 239-2878
When the heat stops working at midnight or the AC quits on the hottest afternoon of the year, the call still needs to go somewhere useful. We take short-notice and emergency work for both residential and commercial customers, and emergency calls are answered during our hours, every day from 6:30 AM to 9:30 PM.
The most common emergency calls we see: a furnace that will not turn on, an AC that is running but not cooling, a heat pump stuck in one mode, or a system that has gone completely down. Each one starts the same way, with a diagnosis of what is actually wrong before any repair is authorized. You are not handed a parts list before anyone has looked at the system.
We're ready to get your heating and cooling running again.
From a quick tune-up to a whole-system replacement, the diagnosis comes first, and the price is confirmed before anything is scheduled. The work covers the full range of residential and commercial HVAC needs, from a single thermostat swap to a complete system replacement.
An AC that is running but blowing warm air, cycling on and off without cooling the space, or making unusual sounds usually points to one of a handful of causes: a refrigerant leak, a condenser or compressor problem, or an airflow restriction. The visit covers a full system check, and older equipment is assessed on its own merits before any recommendation is made. You get a clear picture of what is wrong and what it will take to fix it.
A furnace that will not turn on, one that blows cold air instead of heat, or one that runs but cannot keep up with the thermostat setting all point to specific components. The visit covers the heat exchanger, ignition system, airflow path, and controls. Once the diagnosis is done, you know what the repair involves before any work begins.
Heat pumps handle both heating and cooling, which means a problem in either season can trace back to the same equipment. A heat pump blowing cold air in heat mode, failing to cool in summer, or short-cycling in either season all get the same systematic approach. Heat pumps, furnaces and mini-splits all within scope means no job gets turned away because the equipment type is unfamiliar.
When a system is at the end of its useful life or a property needs a new install, the job starts with scoping on the call. Equipment sizing, what the visit covers, and what the process looks like from start to finish are all worked out before anything is scheduled. We handle full system replacements and new installs for residential and commercial properties across Greenwich.
A thermostat that is not responding, one that is reading the wrong temperature, or a property ready for a smart-control upgrade are all straightforward jobs. Getting the control side right makes a real difference to how consistently the system holds temperature and how easy it is to manage day to day.
Leaking ductwork loses conditioned air before it reaches the rooms that need it. The result is uneven temperatures, higher energy use, and a system that runs longer than it should. A ductwork inspection identifies where the leaks are, and sealing or replacing the affected sections brings airflow back to where it belongs.
Whole-home air filtration and air purifier installation work alongside the existing HVAC system to reduce airborne particulates, allergens, and humidity-related issues. In a region with humid summers, getting the air-quality side right matters as much as the temperature side.
A pre-season tune-up on an AC unit or furnace catches small problems before they become mid-season failures. The inspection covers the components most likely to cause trouble: refrigerant levels, burner operation, heat exchanger condition, electrical connections, and airflow. Connecticut's temperature swings between seasons make this worth scheduling before peak demand hits.
We service heating and cooling in every season.
Connecticut winters are cold, and Greenwich homes carry some of the oldest housing stock in the country. A large share of properties in this part of Fairfield County were built before central air was standard, many run on boiler-based heat, and oil-fired systems are still common throughout the region. These are not edge cases here. They are the bulk of the work.
Boilers and hydronic heating systems heat the living space through radiators, baseboard units, or radiant floors. When a zone stops heating, a circulator pump fails, pressure drops, or a radiator goes cold, the diagnosis covers the full hydronic loop: zone valves, circulator, expansion tank, pressure relief, and heat output at each zone.
Older boiler systems throughout Greenwich and the wider Fairfield County area are still doing the job they were installed to do, sometimes decades after the fact. You get told when a repair is not going to hold, and what the alternative looks like, before any commitment is made.
From aging systems to brand-new installs, the conversion process starts with a clear scope of what is being removed and what replaces it. Greenwich homeowners pursue oil-to-gas and oil-to-heat-pump conversions for several reasons: oil prices, aging equipment that is no longer worth repairing, and the efficiency gains that come with modern heat-pump technology.
The visit covers what the existing setup requires, what the new system will need, and what the job involves from removal through commissioning. Nothing is scheduled until the scope and the price are settled.
A ductless mini-split delivers heating and cooling to a specific room or zone without requiring any existing ductwork. For older Greenwich homes that were built without a central duct system, or for additions where running new ductwork is not practical, a mini-split is often the right answer.
The installation involves mounting the indoor air-handling unit, placing the outdoor compressor, and connecting the refrigerant line. Zoned comfort means each space can be controlled independently, which matters in homes where different areas have very different heating and cooling needs.
Reach out and we'll work out what it needs.
HVAC work like this is the bulk of what a season brings, and commercial properties have their own version of every job on that list. Commercial AC repair, heating system service, seasonal maintenance, and full system replacement for offices, retail spaces, multi-unit buildings, and managed properties all follow the same process: scope the job on the call, diagnose before recommending, and confirm the price before scheduling.
Property managers and building owners can call in a repair or schedule preventive maintenance for a single unit or across multiple spaces. The work is handled the same way regardless of scale.
We'll go through what the service covers before it is booked.
Pricing questions are reasonable, and the answer is available on the call. You get the rate on the phone, before anything is scheduled, and the price covers what the visit includes. Common questions about AC repair cost, furnace replacement cost, heat pump installation, ductwork sealing, and thermostat installation all get a straight answer when you call.
The diagnosis explained before any repair is authorized means you know what the problem is and what the fix involves before the bill is written. There is no pressure to approve work on the spot.
Code-compliant work. Clear diagnosis. Pricing set out up front.
We handle heating and cooling work throughout Greenwich and the towns around it in Fairfield County. If you are nearby, the call still reaches someone who knows the area and can scope the job before anyone is dispatched.
Towns we serve include:
Call (475) 239-2878 and we will go through the system, the symptom, and what the visit covers before anything is scheduled.
The rate for the service call is confirmed on the phone, so you know what to expect before anyone comes out. We take calls every day from 6:30 AM to 9:30 PM.
Yes. We handle heating and cooling work for residential homeowners, landlords, property managers, and commercial clients across Greenwich and Fairfield County. The process is the same regardless of property type: the scope is discussed on the call and the price is confirmed before anything is booked. Multi-unit buildings and commercial spaces are within scope alongside single-family homes.
We take calls and schedule service every day of the week, from 6:30 AM to 9:30 PM. That includes Saturdays and Sundays, which is when a lot of heating and cooling problems surface because the system has been running hard.
Call (475) 239-2878 to confirm availability and get a quote for the visit.
The most useful details are the type of system (furnace, heat pump, central AC, boiler, mini-split), the symptom or reason for the call, and roughly how old the equipment is. That is usually enough to scope the visit and give you a rate on the phone. If the system is unusual or the situation is unclear, we will ask a few more questions before confirming the price.
Weak airflow from the vents, warm air coming out when the AC is running, short cycling where the system turns on and off more frequently than normal, and unusual sounds like banging, rattling, or grinding are all reasons to call. A system that is running but not meeting the thermostat setpoint is also worth checking before it becomes a full failure.
Call (475) 239-2878 and describe what the system is doing and we will go from there.
The person who comes out will start with the symptom you described on the call and work through a systematic diagnostic of the relevant equipment. That covers the unit itself, the controls, the airflow path, and any components most likely to be causing the problem. Once the fault is identified, you are walked through what was found and what the repair involves before any work is authorized.
The price depends on what the job involves, not on a flat rate tied to square footage. A diagnostic visit for a furnace that will not ignite is priced differently from a full system replacement or a ductwork sealing job. The rate is confirmed on the call once we understand the system and the scope, so you know what it covers before anything is scheduled.
Turn the system off and call (475) 239-2878.
A burning smell can come from dust on a heat exchanger that has not run in a while, but it can also point to an electrical fault within the HVAC equipment or a component that is overheating. A loud banging or grinding noise usually means something mechanical is failing. Either way, running the system when those symptoms are present can turn a repair into a replacement.
Yes. We serve Greenwich and the surrounding communities throughout Fairfield County, including Stamford, Darien, New Canaan, Norwalk, Westport, Cos Cob, Old Greenwich, Riverside, Byram, and Glenville.
Call (475) 239-2878 to confirm coverage for your address and get a quote.
Call (475) 239-2878 during our hours, every day from 6:30 AM to 9:30 PM.
We will go through what the system is doing, what type of equipment you have, and what the visit covers. The price is confirmed before anything is scheduled, so there are no open questions before the visit starts.
Yes.
Call (475) 239-2878 as early as you can and we will work out a new time.
The scope and the price confirmed on the original call carry over, so you do not need to start the conversation over from the beginning.
Ready to get the comfort back? Greenwich HVAC Company takes calls every day from 6:30 AM to 9:30 PM for repairs, installations, seasonal maintenance, and emergency service across Greenwich and Fairfield County.
Call for a quote: (475) 239-2878
We're ready to get your heating and cooling running again.
Every heating and cooling call starts the same way: the scope discussed on the phone, the price confirmed before anything is scheduled. We handle the full range of residential and commercial HVAC work across Greenwich and Fairfield County, from a seasonal tune-up on a boiler to a full ductless mini-split installation in a home without existing ductwork. The table below lays out what each service covers, who it fits best, and what is worth knowing before you call.
| Service Type | What the Service Includes | Best For | Helpful Details |
|---|---|---|---|
| Heating & Furnace Repair | Ignition system and burner check, Heat exchanger inspection, Flue and controls review, Full diagnostic before repair | Homes with a furnace blowing cold air or failing to start | Fall is the right time to catch a developing igniter or heat exchanger problem before cold weather puts the system under full load. |
| AC Repair & Service | Refrigerant charge check, Condenser and evaporator coil inspection, Blower motor and airflow assessment, Controls and capacitor check | Homes or commercial spaces with an AC that has stopped cooling or is running poorly | A system that runs but does not cool is often a refrigerant or coil issue, both of which are diagnosed before any repair is authorized. |
| Heat Pump Repair & Service | Refrigerant charge and reversing valve check, Coil and defrost cycle inspection, Electrical controls on the unit, Heating and cooling mode tested | Properties relying on a heat pump year-round for both heating and cooling | A heat pump that struggles in one mode but not the other often points to the reversing valve, which is checked as part of every diagnostic. |
| Thermostat & Smart-Control Installation | Standard, programmable, and smart thermostat options, Low-voltage control wiring on HVAC equipment, Compatibility check with existing system, Setup and calibration | Homeowners upgrading from an older thermostat or adding remote-access control | A thermostat that cycles the system incorrectly can offset efficiency gains from newer equipment. Compatibility with the existing system is confirmed before installation. |
| Ductwork Repair & Sealing | Full duct run inspection, Joint and seam sealing, Sections through unconditioned spaces checked, Airflow measured before and after | Homes with uneven temperatures, high energy bills, or ducts running through attics or crawl spaces | Leaking ducts in older Greenwich homes are one of the more common causes of rooms that never quite reach the thermostat setpoint, even with a system that is otherwise working correctly. |
| Indoor Air Quality & Air Filtration | Whole-home air purifiers and filtration, HVAC-integrated humidifiers and dehumidifiers, Allergen and dust control options, Multi-unit and commercial scope | Households with allergy or humidity concerns, and property managers maintaining air quality across multiple spaces | The right filtration or humidity solution depends on the system and the space. Options are covered on the call before anything is scheduled. |
| Seasonal Maintenance & Tune-Ups | Heat exchanger or coil cleaning and inspection, Refrigerant level check, Controls and safety switch review, Efficiency and overall condition assessment | Homeowners and property managers scheduling before the heating or cooling season starts | A maintenance visit in October is the practical way to find a developing furnace problem before a January no-heat call. Spring works the same way for cooling equipment. |
| Oil-to-Gas & Heat-Pump Conversion | Existing system and load assessment, Equipment options reviewed on the call, Gas furnace, heat pump, or combination scope, Price confirmed before any work begins | Fairfield County homeowners moving away from oil heat | The assessment matches the replacement to the building's actual load rather than defaulting to the easiest option. The scope and the price are confirmed before any work begins. |
| Ductless Mini-Split Installation | Outdoor unit and indoor air handler installation, Heating and cooling in a single system, No ductwork required, Multi-zone options for additions or whole-home use | Older Greenwich homes without existing ductwork, additions, finished basements, and converted attics | A mini-split handles both heating and cooling, which makes it a practical solution for non-ducted spaces where adding a full duct system is not feasible. |
| Boiler & Hydronic Heating Service | Circulator pump and expansion tank check, Heat exchanger inspection, Pressure and controls diagnostic, Boiler repair and replacement | Greenwich homes with radiator-based hot water or steam heating systems | Boiler systems are common in older Fairfield County homes and require a diagnostic approach that differs from forced-air equipment. The full system is assessed, not just the unit. |
| Full System Installation & ReplacementMost Popular | Load calculation and equipment sizing, Full system removal and installation, Residential and commercial scope, Price confirmed before work begins | Homeowners, landlords, and commercial clients replacing aging or failed equipment | Sizing the replacement to the actual load of the space matters as much as the equipment brand. An oversized system short-cycles and an undersized one runs constantly. |
| Emergency HVAC Service | No-heat and no-cool calls, Same diagnostic process as a standard visit, Scope and price confirmed on the phone, Calls taken every day 6:30 AM to 9:30 PM | Anyone dealing with a system that has stopped working during a cold stretch or a heat wave | The season and the symptom together narrow the diagnosis before the visit starts. A furnace that trips in January and an AC that stops cooling in August point to different faults. |
Call (475) 239-2878 to go through what your system needs and get a price before anything is scheduled.
(475) 239-2878