Whether it's a one-time repair or a full system replacement, Onnit Heating and Cooling is the local HVAC company Westland homeowners and property managers call first. We have been handling residential and commercial heating and cooling right here in Wayne County since 2019, and the kind of HVAC work neighbors pass along by word of mouth is what keeps us busy year after year. Family-owned. Locally rooted. Comfort is our business.
We've served this area long enough to know what works, and what doesn't hold up when a Michigan winter turns serious. When we started in 2019, the goal was straightforward: build a heating and cooling company that Westland residents could actually count on, one where a real local person answers the phone and a qualified technician shows up ready to work.
Over the past seven years, we have handled everything from urgent furnace calls on the coldest nights of the year to full HVAC system replacements for property managers juggling multiple units across Wayne County. We work with homeowners who want a simple, honest answer about their system, and we work with commercial clients who need a contractor that shows up on time and gets the job done without disruption.
We keep you posted from the first call until your system's running again. That personal accountability is what sets the tone for every job we take on. Your system is in good hands with us.
For homeowners and property managers who want it done right, we cover the full range of residential and commercial HVAC work. Our technicians are trained and experienced across all major heating and cooling systems, and every job is completed with code-compliant HVAC work on every job as the baseline, not an afterthought.
Here is what we handle:
Work is performed by qualified HVAC technicians on every call, whether it's a quick diagnostic or a multi-day installation. We'll take care of the system from here.
Choosing the right HVAC fix is easier than it sounds when you work with someone who understands this climate. Michigan winters are not mild. Sustained below-freezing temperatures from December through February put real stress on furnaces, heat pumps, and boilers. A system that was running fine in October can leave a family without heat by January if seasonal maintenance gets skipped.
Summers here bring their own demands. The humidity that settles into Wayne County through July and August means your air conditioner is working hard on two fronts: temperature and moisture. An older or undersized system that can't keep up will run constantly and still leave the house uncomfortable.
There is also the housing stock to consider. Many Westland homes were built in the 1960s, 70s, and 80s, and the ductwork in those houses has had decades to develop leaks, gaps, and airflow problems. Sealing and repairing that ductwork often makes a bigger difference in comfort and energy efficiency than replacing the unit itself. Indoor air quality matters year-round too, especially in a climate where windows stay closed for months at a time.
A fall furnace tune-up before the cold sets in, and a spring AC checkup before summer humidity arrives, keeps your system running at its best when you need it most. Pick up the phone and we'll get started.
Getting your comfort problem handled starts with a quick call. When your heat goes out in the middle of a Michigan winter, or your air conditioner stops working during a July heat wave, waiting a few days for a technician is not an option. We respond promptly to urgent and last-minute calls because we understand what a failed system means for a family or a commercial property.
Our emergency HVAC service covers no-heat calls, no-cool situations, and full system failures across furnaces, heat pumps, air conditioners, and boilers. Same-day service is available for urgent situations, and we work to get your system back online as quickly as possible.
When you call, you reach someone who knows the area and can give you a straight answer about what is happening with your system. We provide honest recommendations on repair versus replacement, never an upsell. If a repair makes sense, we will tell you. If a replacement is the smarter long-term move, we will explain exactly why.
One number. One call. One HVAC tech at your door.
We've served this area long enough to know that cost is one of the first things on a homeowner's mind when something goes wrong with their system. HVAC repairs and replacements are not small expenses, and no one wants to get partway through a job and discover the price has changed.
Our approach is simple. Before any work begins, we assess the situation, explain what we found, and give you a clear picture of what the repair or replacement will involve and what it will cost. If there are options, we walk you through them. There are no surprise charges added at the end of a job.
For property managers and commercial clients, the same transparency applies. You will know what you are approving before we start, and we will not recommend work that is not needed.
Call (734) 899-5495 to request an estimate or get a quote on your HVAC repair, replacement, or maintenance service.
We've served this area long enough to know that Wayne County is not one neighborhood, it is dozens of communities with different housing types, different property needs, and different expectations from a contractor. We work with residential homeowners across the county and with property managers and commercial clients who need reliable HVAC service on a schedule that works for their properties.
On the commercial side, we handle rooftop unit repair and service, commercial heating and cooling system maintenance, and HVAC replacements for small to mid-size commercial buildings. We keep the scope proportional to what the property needs, and we work around business hours when the situation calls for it.
Beyond Westland, we regularly serve customers in Livonia, Garden City, Wayne, Canton Township, Dearborn Heights, and Inkster. If your property is in the surrounding area, call us and we will confirm coverage.
You reach a real local person when you call, and a qualified HVAC technician is the one who shows up at your door. We are locally owned and personally accountable for every job that goes out under our name. That direct accountability is something we take seriously on every call.
We have been serving Westland and Wayne County since 2019, which puts us at seven years of heating and cooling work in this area. Over that time we have built our reputation on straightforward service and honest recommendations, the kind of work that gets passed along neighbor to neighbor.
We work with residential homeowners, rental property owners, landlords, property managers, and small commercial building owners across Wayne County. Whether you have a single-family home or a multi-unit property, we bring the same approach to every job.
Our technicians are qualified HVAC professionals who take the work seriously and are personally connected to the reputation of this business. Because we are locally owned, every technician represents the business directly. That personal stake in the outcome shows up in the quality and care of the work.
We keep you informed from the first call through the completion of the work. If a technician finds something unexpected on-site, they explain it before moving forward. You will know what is happening with your system at every stage, and you will not be asked to approve work that has not been explained to you.
We respond promptly to every call, including urgent and last-minute requests. For emergency situations like a no-heat call in winter or a system failure in summer, same-day response is our goal. Call us at (734) 899-5495 and we will get you on the schedule as quickly as possible.
Onnit Heating and Cooling has spent seven years earning the trust of homeowners and property managers across Westland and Wayne County. We show up, we do the work right, and we stand behind it.
Dependable service. Honest rates. Local HVAC know-how.
Call (734) 899-5495 to schedule a service call, request an estimate, or get help with an HVAC emergency. We are ready to help.
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