No overselling, no guesswork — just a Hvac crew that diagnoses it right the first time. Priority scheduling available across Duncan and the surrounding zip codes.
No automated menus for emergencies — a real person handles the call.
A licensed technician arrives, runs a full diagnostic, and explains exactly what's wrong in plain language.
Warranty details are explained clearly so you know exactly what's covered going forward.
Leonard HVAC grew one honest service call at a time in communities like Duncan. Every technician we send to your door is background-checked, factory-trained, and licensed to work on the systems installed throughout Duncan, SC.
We're not interested in being the cheapest quote on the page — we're the company that tells you what actually needs fixing instead of what pads the ticket. Every job we run is backed by full liability coverage and current state licensing, and we keep that documentation available on request for every job, big or small.
Being local matters more than most companies let on. That local knowledge shapes the parts we stock on the truck — it's the difference between a tech who's guessing and a tech who's seen your exact situation a hundred times before.
Too many homeowners in Duncan have a story about a tech who showed up late, quoted one price, and charged another. That's the gap we built Leonard HVAC to close. Every dispatcher, every technician, and every follow-up call is held to the same standard, because a customer who trusts us once tends to call us again — and Duncan is a small enough community that reputation travels fast.
That local context saves time on every call, because we're not starting from zero on basic questions about your neighborhood or your system. We keep parts inventory stocked based on what actually fails most often on Duncan's housing stock.
We cover the full range of heating, cooling, and air quality work Duncan properties actually need.
A dead system in the middle of a heat wave or a cold snap isn't just inconvenient — it can be a real safety issue for kids, pets, and older residents. Our Duncan dispatch team sends the closest available truck first so a technician is diagnosing your system as fast as physically possible.
We keep the truck stocked with the parts that fail most often on the equipment common to Duncan homes, which is exactly why most repairs don't require a return visit.
If your unit is past its expected service life, running loud, or spiking your utility bill, a replacement conversation is worth having. We walk Duncan homeowners through efficiency ratings and how they translate into real monthly savings before a single piece of equipment gets ordered.
We protect floors and entryways during the install and haul away the old equipment so you're not left dealing with disposal.
Downtime in a commercial space costs money every hour a system is offline. Our commercial division services multi-zone commercial buildouts across Duncan, with after-hours work to avoid disrupting business.
We understand that a commercial call isn't just about comfort, it's about keeping a business open.
Preventive maintenance is the cheapest repair you'll ever pay for, because it's the one that prevents the bigger bill. Beyond standard tune-ups, we also handle duct cleaning and sealing to stop conditioned air from leaking into attics and crawlspaces for Duncan households that want more than just temperature control.
We'll show you photos of anything concerning we find, along with a plain-language explanation of what it means and whether it's urgent.
Guarantees only mean something if a company actually honors them, so here's exactly what ours covers.
Every repair comes with a workmanship warranty explained in plain terms before we leave.
We quote a flat rate before work begins and that number doesn't change once you approve it.
A technician doesn't consider the job done until the system is tested and performing correctly.
Catching these signs early usually means a same-day repair instead of an emergency call at the worst possible moment.
A healthy system runs with a consistent, low hum — banging, screeching, or grinding usually points to a loose part or failing motor.
This is one of the most common complaints we hear on service calls across Duncan.
A system working harder than it should to hit the same temperature shows up directly on your utility bill.
Short cycling puts extra wear on the compressor and shortens the system's overall lifespan.
Chemical odors may signal a refrigerant leak, which requires a licensed technician to handle safely.
If you're calling about the same problem every few months, the underlying cause likely hasn't been fully addressed.
You'll know the cost before a wrench touches your system.
Dispatchers give you a realistic arrival window instead of a vague "sometime today".
If something isn't right after we leave, we come back and make it right.
Every technician carries current state licensing and manufacturer training.
You make the final call — we just make sure you have the full picture.
We'll walk you through what's actually available before you decide.
Every review below reflects an actual service call in the Duncan area.
"Our AC quit on the hottest weekend of the year and they had a tech out within a couple of hours. Fixed on the first visit and explained everything in terms I could actually understand."
"We've used them for our maintenance plan for two years now and never had a surprise breakdown. Techs are always polite, always on time, and clean up after themselves."
"Had a full system replacement done and it was the smoothest home project I've had in years. Followed up a week later just to check everything was still running fine."
"As a property manager, having a company that actually answers after-hours calls is rare. Documentation for our records was thorough and easy to file."
"The estimate matched the final invoice exactly, down to the dollar. Would use them again without hesitation."
"The tech walked me through what he was checking as he went, which I really appreciated. No overnight surcharge shock — the price matched what dispatch quoted me on the phone."
After thousands of service calls across Duncan, a handful of causes show up again and again.
Homeowners who schedule a tune-up ahead of each season tend to call us far less often for emergency repairs. Filters should be checked monthly during heavy-use seasons and replaced roughly every 60-90 days depending on your household and any pets.
Simple habits between professional visits also matter. None of this replaces a professional tune-up, but it does reduce the wear that leads to premature breakdowns between visits.
We also service package units common on manufactured and modular homes throughout the Duncan area. If your system was installed by a different company entirely, that's not a problem — we service equipment regardless of who originally put it in, and we'll pull the model and serial information to confirm parts compatibility before any repair begins.
We don't outsource dispatch to a call center that's never met our technicians.
Over a decade in residential heating and cooling, with a focus on load calculations and full system replacements.
Runs point on overnight and weekend emergency calls throughout Duncan.
Works directly with Duncan property managers to schedule around business hours.
For emergency no-heat or no-cool calls, we prioritize dispatch and aim to have a technician on-site the same day, often within a couple of hours.
Our policy is simple: you approve the number before we touch the system.
Yes, no-heat and no-cool situations are treated as priority calls regardless of the hour.
Yes — licensing and insurance documentation is available on request for any job, residential or commercial.
Our technicians walk you through the actual numbers — repair cost versus remaining system life versus new equipment efficiency — before making a recommendation.
Yes, our maintenance plans include seasonal tune-ups, priority scheduling, and discounted repair rates for members.
If you're unsure whether your address falls in our service area, a quick call to +1-866-805-8548 will confirm it.
Yes, we run separate residential and commercial divisions, both fully licensed and equipped for their respective equipment.
If parts require special ordering for a less common brand, we'll communicate that timeline upfront.
Ask about financing during your in-home estimate to see what fits your situation.
Twice-yearly maintenance is the standard we recommend given the temperature swings the area sees.
Beyond basic safety checks, it's best to leave diagnosis to a licensed technician rather than attempting a repair yourself.
We'd rather quote it honestly on the phone than have you feel ambushed by the bill.
Most standard repairs are completed in under two hours once the technician has diagnosed the issue and you've approved the quote.
Let dispatch know ahead of time if access will be handled differently than a standard homeowner visit.
Housing stock varies a lot across Duncan — older homes often still run original ductwork that needs different care than the sealed, high-efficiency systems going into newer builds.
If you manage several units or a shared system across a Duncan property, ask about setting up a standing service account so every request gets handled under one consistent agreement.
A full system replacement is one of the bigger home expenses most people face, and we don't expect everyone to pay it in a single lump sum. If a rebate or local incentive program applies to your Duncan installation, our technicians will flag it during the estimate rather than leaving you to track it down after the fact.
If your address falls within Duncan, SC and near Duncan, there's a strong chance we already service your street.
If you're on the edge of our listed zip codes, it's still worth a call, since routes and coverage get adjusted as demand shifts.
