Whether it's a one-time repair or a full system replacement, Onnit Heating and Cooling is the local HVAC team Westland and Wayne County homeowners, landlords, and businesses call first. We handle everything from emergency no-heat calls in the middle of a Michigan winter to full system installations that keep a property comfortable year-round. Dependable service. Honest rates. Local HVAC know-how.
Call (734) 899-5495 for a quote today.
For homeowners and property managers who want it done right, we offer a full range of heating and cooling services across Westland and the surrounding area. That means AC repair and service, heating repair, heat pump installation and service, full system replacement, ductwork repair and sealing, thermostat and smart-control installation, indoor air quality and air filtration, seasonal maintenance, and emergency response when your system goes down. We work with residential homeowners, rental property owners, commercial building managers, and small businesses. Every job gets code-compliant HVAC work, whether it's a quick tune-up or a complete central air installation.
When your air conditioner stops cooling or starts acting up, we diagnose the problem and fix it right. Our technicians handle refrigerant leak diagnosis, condenser and compressor service, airflow issues, and anything else standing between you and a comfortable home. Michigan summers are short, so when your AC needs attention, fast service matters.
A furnace that won't start, a system blowing cold air, or rooms that never seem to warm up all point to a heating problem that needs attention. We troubleshoot airflow issues, uneven temperatures, ignition problems, and more. Getting your heat back on quickly is the priority, especially when temperatures outside are dropping fast.
Heat pumps are a smart, efficient option for year-round comfort, and we handle both repairs and new installations. That includes mini-split and ductless systems for homes or spaces where traditional ductwork isn't practical. If your heat pump isn't keeping up, we'll find out why and get it sorted. Your system is in good hands with us.
When a repair no longer makes sense, a full HVAC system replacement is the smarter investment. We help you choose the right equipment for your home or building, walk you through the options, and handle the installation from start to finish. Energy-efficiency upgrades are worth considering at replacement time, and we'll explain what the differences actually mean for your comfort and your utility costs.
A thermostat that's not working right can throw off your whole system. We install and service standard thermostats, programmable models, and smart thermostats that let you control your comfort from anywhere. Zoning and comfort-control systems are also available for larger homes or multi-room buildings where one setting doesn't fit every space.
Leaking or damaged ductwork wastes energy and leaves parts of your home too hot or too cold. We locate the problem, seal the leaks, and repair or replace sections of duct that aren't doing their job. Proper ductwork makes every other part of your HVAC system work better.
The air inside your home matters as much as the temperature. We install air filtration systems, whole-home air purifiers, and humidity-control solutions that work with your existing HVAC equipment. Whole-home humidifier installation is a popular upgrade here in Michigan, and we cover that in more detail in the regional section below.
A spring tune-up on your AC and a fall check on your furnace are the simplest ways to avoid a breakdown when you need your system most. We inspect, clean, and adjust everything that needs attention so your equipment runs efficiently through the season ahead. We'll take care of the system from here.
Getting your comfort problem handled starts with a quick call. When your heat goes out on a January night or your AC stops working on one of the few genuinely hot days of a Michigan summer, you need someone who picks up and shows up. We offer prompt response, even for last-minute comfort calls, because a no-heat or no-cool situation is never something that can wait until next week. We keep you posted from the first call until your system's running again. Pick up the phone and we'll get started.
Westland winters are long, cold, and serious. Heating isn't a seasonal convenience here, it's a necessity from October through March and sometimes beyond. The services below reflect what this climate actually demands.
Gas and propane forced-air furnaces are the backbone of home heating across this part of Michigan, and when one fails in mid-winter, it's urgent. We respond quickly to no-heat calls, diagnose the problem, and get the repair done. When the furnace is older or the repair cost doesn't make sense, we give honest recommendations on repair versus replacement, never an upsell. You'll know exactly what your options are before any decision gets made.
Modern cold-climate heat pumps are rated to operate efficiently down to roughly -15 degrees Fahrenheit, which means they're now a genuine option for Michigan homes. They provide efficient heating in winter and cooling in summer from a single system, and utility incentives have made them an increasingly popular upgrade in Wayne County. We size and install cold-climate heat pump systems suited to this region's temperature range, not just the mild-weather models that fall short when the weather turns serious.
Forced-air heating systems pull moisture out of the indoor air, and Michigan winters are dry enough that this becomes a real comfort issue. Dry air affects sleep, skin, woodwork, and even how warm a room actually feels at a given temperature. A whole-home humidifier installed directly into your HVAC system delivers consistent humidity control throughout the house, automatically, without the hassle of portable units. It's one of the most practical add-ons for any home running a gas furnace through a long winter. Your system is in good hands with us.
Choosing the right HVAC fix is easier than it sounds when someone walks you through it plainly. Before any work begins, we explain what the job involves, what it will cost, and why we're recommending the approach we are. No surprises on the invoice, no pressure to approve work you don't understand. That's the kind of HVAC work neighbors pass along by word of mouth, and it's how we've built our reputation in this area. One number. One call. One HVAC tech at your door.
We've served this area long enough to know what works, and since 2019 we've been showing up for Westland homeowners, rental property owners, property managers, and commercial building owners across Wayne County and the wider metro. We're locally owned and personally accountable for every job that goes out under our name. When you call, you reach a real local person who knows the area and understands what heating and cooling in this part of Michigan actually involves. Our technicians are qualified HVAC professionals who take the work seriously, and we hold every job to the same standard whether it's a small residential repair or a full commercial system replacement. Pick up the phone and we'll get started.
We're based in Westland and work throughout Wayne County, including Garden City, Livonia, Canton, Wayne, Inkster, Dearborn Heights, Romulus, and Taylor. If you're nearby and need heating or cooling service, there's a good chance we've already worked in your neighborhood. Call us to confirm we cover your area and to get a quote.
We are based in Westland and serve customers throughout Wayne County, including Wayne, Garden City, Inkster, Livonia, Canton Township, and Dearborn Heights. If you are nearby and not sure whether we reach your address, call us at (734) 899-5495 and we will confirm coverage right away.
Yes. We are available every day from 6:30 AM to 8:00 PM, including Saturdays and Sundays. If your system goes down over a weekend, you do not have to wait until Monday to get someone out.
Call us at (734) 899-5495 and we will talk through what your system is doing, give you a straight answer on what it likely involves, and get a technician scheduled. For urgent situations, we work to get someone out the same day.
When you call, we gather the basics about your system and schedule a visit. The technician arrives, diagnoses the problem, and walks you through what they found before any work begins. Once you approve the approach, we complete the repair or service and make sure the system is running correctly before we leave.
We keep you posted from the first call until your system is running again. If the technician finds something unexpected once they are on-site, they will explain it to you before proceeding. You will not be surprised by work you did not approve.
Weak airflow, warm air coming from the vents when the AC is running, a system that cycles on and off too frequently, or unusual noises like banging, grinding, or rattling are all signs to call promptly. A burning smell coming from your vents is a reason to shut the system off and call us immediately.
Turn the system off and call us at (734) 899-5495. A burning smell can indicate an electrical issue within the HVAC equipment or overheating components, and running the system further can make the problem worse. We respond promptly, even for last-minute calls.
Age, repair history, and efficiency are the main factors. A system that is 15 or more years old, has needed multiple repairs in recent seasons, or is struggling to hold temperature is often a better candidate for replacement than another repair. We give honest recommendations on repair versus replacement and walk you through the numbers so you can decide.
The diagnostic visit covers the assessment of your system regardless of home size. Repair or replacement costs vary based on the work involved, the equipment needed, and the scope of the job. We explain what the cost is based on before any work begins so there are no surprises on the invoice.
Yes. We work with small businesses, commercial building managers, landlords, and property managers across Wayne County. Commercial jobs get the same upfront pricing and code-compliant HVAC work as any residential call.
From furnace repair and heat pump installation to AC service and full system replacement, Onnit Heating and Cooling handles the full range of residential and commercial HVAC work across Westland and Wayne County. Call (734) 899-5495 for a quote or to schedule service. Family-owned. Locally rooted. Comfort is our business.
We handle the full range of residential and commercial heating and cooling work across Westland and Wayne County. Whether you need a quick repair, a seasonal tune-up, or a full system replacement, every job gets the same upfront pricing and code-compliant workmanship. The table below covers what each service includes, who it fits best, and a practical note to help you decide where to start. Call us at (734) 899-5495 and we will walk you through the right option for your situation.
| HVAC Service | Scope of Work | When You Need It | Helpful Details |
|---|---|---|---|
| AC Repair & Service | refrigerant leak diagnosis, condenser and compressor service, airflow troubleshooting, cooling performance restoration | homeowners whose AC is underperforming or not cooling at all | Michigan summers are short, so a slow AC can cost you the whole season if you wait on the repair |
| Thermostat & Smart-Control Installation | standard and programmable thermostat installation, smart thermostat setup and pairing, zoning and comfort-control systems, existing system compatibility check | homeowners who want better control over comfort and energy use | a faulty or outdated thermostat can make an otherwise healthy system behave erratically |
| Cold-Climate Heat Pump Installation | cold-climate rated equipment sizing, full system installation and commissioning, heating and cooling performance verification, utility incentive guidance | Michigan homeowners who want efficient year-round comfort from a single system | modern cold-climate heat pumps are rated to operate efficiently down to roughly -15 degrees Fahrenheit, making them a genuine option for this region |
| Heating & Furnace Repair | ignition and burner diagnosis, airflow and blower service, uneven heating troubleshooting, no-heat emergency response | any home or building that has lost heat or is heating unevenly | prompt diagnosis in fall or early winter prevents a full breakdown in the coldest weeks |
| Furnace Repair & Replacement | gas and propane furnace diagnosis, heat exchanger and ignition repair, full furnace replacement and installation, honest repair-versus-replace guidance | Westland homeowners dealing with a furnace that fails or underperforms in winter | Wayne County winters make a reliable furnace essential from October through March and often beyond |
| Full System Installation & Replacement | equipment sizing and selection, full system removal and installation, ductwork connection and verification, post-install performance check | homeowners with aging or failing equipment ready for a long-term comfort upgrade | replacement is often the smarter investment when a system is 15 or more years old or has needed repeated repairs |
| Ductwork Repair & Sealing | leak detection and sealing, damaged section repair or replacement, airflow balancing, energy-loss assessment | homes with rooms that are consistently too hot or too cold, or with rising utility bills | leaky ducts can waste 20 to 30 percent of the air your system produces before it reaches the living space |
| Indoor Air Quality & Air Filtration | whole-home air purifier installation, media and HEPA filtration upgrades, humidity control solutions, integration with existing HVAC equipment | households concerned about allergens, dust, or air quality inside the home | air quality upgrades work with your existing system and do not require a full replacement to install |
| Whole-Home Humidifier Installation | whole-home humidifier sizing and selection, integration with forced-air HVAC system, automatic humidity control setup, ongoing maintenance guidance | any home running a gas furnace through a Michigan winter with dry indoor air | forced-air heating strips moisture from indoor air; a whole-home humidifier solves this automatically without portable units |
| Seasonal Maintenance & Tune-Ups | inspection and cleaning of key components, refrigerant and pressure checks, filter and airflow verification, efficiency and safety assessment | any homeowner or property manager who wants to avoid mid-season breakdowns | a spring AC tune-up and a fall furnace check are the two simplest ways to protect your equipment investment |
| Emergency HVAC Service | same-day no-heat and no-cool response, urgent system-down diagnosis, after-hours availability, prompt dispatch across Wayne County | any situation where the system is completely down and waiting is not an option | we respond promptly even for last-minute comfort calls, including weekends |
| Heat Pump Repair & Service | heating and cooling performance diagnosis, refrigerant and coil service, mini-split and ductless repair, control and thermostat checks | homes already running a heat pump that is losing efficiency or failing to hold temperature | cold-climate heat pumps require technicians familiar with low-temperature performance ratings |
How do I know whether my system needs a repair or a full replacement?
Age, repair history, and current performance are the main factors we look at. A system that is 15 or more years old, has needed multiple repairs in recent seasons, or is struggling to hold temperature is often a better candidate for replacement than another repair. We give honest recommendations on repair versus replacement and walk you through the numbers before any decision gets made, so you understand exactly what you are choosing between.
What are the signs that my furnace or AC needs attention right now?
Weak or uneven airflow, a system that cycles on and off too frequently, rooms that never reach the set temperature, unusual noises like banging or grinding, or a burning smell from the vents are all reasons to call promptly. A burning smell in particular is a reason to shut the system off and call us immediately, since it can indicate overheating components inside the equipment.
How often should I schedule maintenance and tune-ups?
We recommend a spring tune-up on your air conditioner and a fall check on your furnace or heat pump each year. That twice-a-year schedule catches small problems before they become expensive ones and keeps your equipment running efficiently through each season. Skipping maintenance is one of the most common reasons systems fail at the worst possible time.
Transparent Upfront Pricing
We explain what the job involves and what it will cost before any work begins. No surprises on the invoice, no pressure to approve work you do not fully understand.
What does a seasonal tune-up actually cover?
A tune-up is not just a visual check. We inspect and clean key components, verify refrigerant levels and pressures on cooling equipment, check airflow and filter condition, test ignition and burner operation on heating equipment, and run a safety and efficiency assessment. The goal is to leave the system in the best possible condition for the season ahead.
Is a cold-climate heat pump actually practical for Michigan winters?
Yes, with the right equipment. Standard heat pumps lose efficiency quickly in cold weather, but modern cold-climate models are rated to operate efficiently down to roughly -15 degrees Fahrenheit. That covers the realistic temperature range in the Westland area. We size and install cold-climate systems suited to this region, and utility incentives in Michigan have made them an increasingly popular upgrade.
Why is whole-home humidity control worth adding to a forced-air system?
Gas furnaces and forced-air heating pull moisture out of indoor air, and Michigan winters are long and dry enough that this becomes a real comfort issue. Low humidity affects sleep, skin, wood floors and trim, and even how warm a room actually feels at a given temperature. A whole-home humidifier installed directly into your HVAC system delivers consistent humidity control automatically, without the hassle of portable units.
Same-Day and Emergency Availability
We respond promptly to no-heat and no-cool calls, including weekends and last-minute situations. When your system goes down, you should not have to wait days to get someone out.
What causes one room to be much hotter or colder than the rest of the house?
Uneven temperatures usually point to a ductwork problem, an airflow imbalance, or an undersized or aging system. Leaking or damaged ducts waste conditioned air before it reaches certain rooms. In some cases, a zoning or thermostat issue is the cause. We diagnose the specific reason rather than guessing, and we explain what we find before recommending any work.
How does emergency or same-day service work?
When your heat goes out in January or your AC stops working on a hot day, call us at (734) 899-5495. We work to get a technician out the same day for urgent situations, and we are available every day including weekends. We keep you posted from the first call until your system is running again, so you are not left waiting without an update.
Code-Compliant Work on Every Job
Every installation and repair we perform meets current code requirements. Our technicians are qualified HVAC professionals who take the work seriously on every job, from a small residential repair to a full commercial system replacement.
Do I need to be home while the technician is working?
Yes, we ask that an adult be present for the visit. The technician will walk you through what they find before any work begins and will need your approval before proceeding with a repair or replacement. Being present also gives you the chance to ask questions and understand exactly what is being done and why.
How does pricing and estimating work before the job starts?
Before any work begins, we explain what the job involves, what it will cost, and why we are recommending the approach we are. You will not see charges on the invoice for work you did not approve. If the technician finds something unexpected once they are on-site, they will explain it to you before proceeding.
Can leaky ductwork really raise my energy bills that much?
It can. Leaking ducts can waste 20 to 30 percent of the conditioned air your system produces before it ever reaches the living space. That means your furnace or AC is working harder and running longer to hit the temperature you set. Sealing and repairing ducts is one of the most cost-effective improvements you can make to an existing system.
Call us at (734) 899-5495 and we will talk through your system, answer your questions, and get you a straight quote on the work you need.
(734) 899-5495