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Commercial Expertise
Whether your rooftop unit is running flawlessly or starting to show its age, Lake Area Heating & Air brings 18 years of commercial HVAC experience to every job. We specialize in RTU systems up to 25 tons—the backbone of light commercial climate control across Clay & Putnam County. A rooftop unit breakdown isn’t just an inconvenience for your business—it’s lost revenue and a liability risk. We handle installation, repair, and maintenance with the same professionalism and accountability we’ve built our reputation on.
Why Choose Us
We’re not moonlighting in the commercial space; it’s core to how we operate. Our team has diagnosed, repaired, and installed RTU systems across Clay & Putnam County since 2008. That experience translates to faster troubleshooting, better long-term planning, and genuine accountability to local businesses.
We carry and spec the equipment that built commercial HVAC reliability. As an American Standard Premier Dealer and Gree Select Dealer, we have access to the parts, support, and dealer-exclusive training that keeps your rooftop unit running predictably. When you choose Lake Area, you’re backed by manufacturer backing.
Commercial downtime is expensive. We give you a clear diagnosis, transparent repair options, and a maintenance pathway that protects your system without unnecessary upsells. You’ll know what’s broken, why, and what it costs—before we touch anything.
Our veteran ownership isn’t marketing—it shapes how we operate. Discipline, reliability, and finishing the job right are embedded in our team. We treat your property and your climate system with the respect yours deserves.
We’ve built this business to serve our communities, not to extract value from them. We show up when you call. We remember your systems. We think in years, not transactions.
RTU maintenance doesn’t have to be one-off. Our flexible service agreements let you budget predictably, get seasonal inspections, and catch small problems before they wreck your day. More consistent comfort, more predictable costs.
Get Started
Ready to get your rooftop unit inspected, repaired, or replaced? Use the form below to describe your situation, and we’ll get back to you with options—no pressure, no surprise fees.
Warning Signs
Rooftop units are designed to push conditioned air throughout the space, but as they age, airflow patterns change. Some areas stay comfortable while others lag behind. You might notice that certain rooms or zones stay stubbornly warm or cold. This often points to a refrigerant leak, dirty filter media that’s restricting flow, or a failing compressor struggling to maintain pressure. Ignoring it means compensating tenants or losing productivity in dead zones.
A healthy RTU hums, but it shouldn’t rattle, grind, or produce a high-pitched whine. Noise coming from your rooftop unit is a diagnostic tool: a grinding sound can mean bearing wear, a refrigerant leak produces a hissing, and electrical component failure often sounds like a buzz or buzz-click cycle. Unusual vibration can indicate loose fasteners, worn isolation mounts, or an internal compressor problem developing. Early diagnosis prevents a catastrophic breakdown that takes down your whole building’s climate.
RTUs don’t get more expensive to run unless something inside is working harder than it should. A rising utility bill—with the same usage pattern as before—signals declining efficiency: refrigerant loss, fouled condenser coils reducing heat exchange, a failing compressor fighting to build pressure, or thermostat drift sending the unit into overcycle. Catching this in month two of the trend, not month six, saves you from a much larger repair bill.
Rooftop exposure means water and salt air attack—especially near coastal or humid regions. Rust spots on sheet metal, visible refrigerant oil leaks, or water stains inside the building below the penetration are all red flags. Surface rust is cosmetic; deep pitting can compromise the cabinet. Refrigerant leaks reduce cooling efficiency and can lead to compressor failure. Roof penetration leaks invite mold and structural damage.
If your RTU is dead or cycles erratically—starting for a few minutes, then stopping, then restarting—suspect electrical failures, failed contactors, a tripped disconnect switch, or a thermostat not communicating properly. Intermittent operation is particularly frustrating for commercial tenants and suggests component-level failure rather than refrigerant or airflow issues.
You set the thermostat, but the building doesn’t reach setpoint, or it takes hours longer than it used to. This is classic refrigerant loss, a clogged filter media choking airflow, or a compressor reaching the end of its lifespan. In summer, a slow-decline cooling failure can damage product, spoil inventory, or make your space unrentable. Early diagnosis buys time for planned replacement.
Our Process
Step 1 of 5
We arrive with the tools to read your system: gauges to check refrigerant pressure, thermal imaging to see temperature gradients and spot efficiency loss, electrical test equipment to verify component function, and a clear knowledge of RTU design. We inspect the condenser coils, check the compressor discharge line temperature, verify airflow through the filter media, test the thermostat, and document the unit’s nameplate data. You get a written diagnostic report—not a sales pitch—that explains what’s working, what’s declining, and what needs attention soon versus what can wait. This diagnostic clarity is foundational: you make decisions based on facts, not guesses. What to expect: A thorough on-site inspection, photos of the unit and any visible wear, and a written report you can keep for your records. We’ll call with findings and options before any repair or maintenance begins.
Step 2 of 5
Once we’ve diagnosed the problem, we walk you through your path forward. Is it a minor repair that extends the unit’s usable life? A component replacement that restores full capacity? Or time to start planning a replacement unit that meets your comfort and budget needs? We’ll give you the cost of each option, the timeline, and what each choice means for your building’s climate reliability. You decide based on what fits your business and your planning window. What to expect: A phone call or in-person discussion laying out scenarios. If multiple options exist, we explain the trade-offs—upfront cost, longevity, efficiency gains, risk of further failure. You’re in control.
Step 3 of 5
When you give us the green light, we execute. Our techs carry common wear parts (capacitors, contactors, thermostats, filters), so many repairs finish in one visit. Larger jobs—compressor replacement, full refrigerant recharge after a leak, or installation of a new unit—are scheduled at a time that fits your business, and we keep you updated every step. We test thoroughly before we leave: verify pressure and temperature, confirm thermostat operation, check for leaks, and document everything for your file. What to expect: Punctual arrival, respect for your commercial schedule, professional workmanship, and a job completion summary. We call ahead if we’re running late and pack up as cleanly as we arrived.
Step 4 of 5
Routine maintenance catches small problems before they turn into major breakdowns. We offer seasonal RTU tune-ups that include filter replacement, condenser coil cleaning, electrical component testing, refrigerant integrity checks, and thermostat calibration. Members get convenient scheduling for repairs, discounted labor rates, and the peace of mind that your critical system is being watched by people who know your equipment. What to expect: Scheduled maintenance appointments (typically spring and fall for commercial buildings), written inspection reports after each visit, and a maintenance schedule that fits your budget and your building’s climate demands.
Step 5 of 5
RTU systems have a finite lifespan, and well-maintained units last considerably longer than neglected ones. We work with you to understand when your system is approaching replacement age, help you budget for the next unit, and time the replacement to avoid unplanned failures. When it’s time to install a new system, we’ll spec the right capacity, efficiency, and features for your commercial space—and we’ll handle the installation start to finish. What to expect: Annual or as-needed system health checks, cost estimates for planned upgrades, and a long-term view of your facility’s climate needs. We become the people you call when you need commercial HVAC confidence.
Our Expertise
Refrigerant loss reduces cooling capacity and forces the compressor to work harder, raising energy bills and shortening compressor life. We use electronic leak detection equipment to pinpoint the source, repair the leak, recover the old refrigerant per EPA standards, pull a proper vacuum, and recharge the system to factory specifications. Proper refrigerant charge is the heartbeat of your RTU.
The compressor is your RTU’s engine; when it fails, your whole system stops. We test compressor discharge line temperatures, pressure ratios, and electrical current draw to diagnose developing problems before total failure. Replacement compressors are a major expense, but we’ll give you honest guidance: repair a worn bearing, or budget for a new unit if we see end-of-life signs.
Contactors, capacitors, thermostats, and fan motors are all common failure points. We stock replacement parts and test electrical circuits to isolate the fault. Many electrical RTU failures are resolved in a single visit, restoring your cooling or heating without waiting for special order parts.
Rooftop exposure means dirt, pollen, and debris coat your condenser coils every season. A fouled coil reduces heat rejection, raises discharge temperatures, and makes your compressor work harder. We clean condenser coils chemically or mechanically, depending on the buildup, and restore cooling efficiency. This alone can meaningfully lower energy costs on a fouled unit.
Clogged filters starve your RTU of return airflow, reducing cooling, raising static pressure, and straining the blower motor. We replace filter media, inspect ductwork for blockages, and verify that the air handler is moving design airflow. Better airflow means better comfort and lower energy bills.
If your RTU runs but doesn’t hold setpoint, the thermostat may be miscalibrated or failing. We test thermostat sensors, verify communication between the control board and the unit, and adjust or replace thermostats as needed. A working thermostat is the command center that keeps your building comfortable.
When repair costs climb high enough that a new unit becomes the more sensible investment, replacement becomes the smart move. We’ll spec a new RTU matched to your building’s tonnage and efficiency needs, handle all installation logistics, tie it into your existing ductwork and controls, and test it thoroughly. New RTUs come with manufacturer warranties and efficiency ratings that can save energy year after year.
RTU maintenance isn’t optional—it’s the difference between a well-maintained system and one that fails prematurely. We offer flexible maintenance agreements: spring and fall seasonal checkups, filter replacement, coil cleaning, electrical safety testing, and refrigerant monitoring. Plan members get convenient scheduling for repairs and discounted labor rates.
Plans & Financing
Keeping your HVAC system running well takes more than a single repair call — it takes a plan. Lake Area Heating & Air offers both a maintenance plan and flexible financing to make that easier for Clay & Putnam County families.
Regular maintenance catches small problems in your Central AC, furnace, heat pump, or mini-split before they become expensive repairs, and it keeps your system running efficiently through Florida’s long cooling season. Lake Area Heating & Air’s maintenance plan covers both residential and commercial equipment.
Big HVAC repairs and replacements shouldn’t have to wait, which is why Lake Area Heating & Air offers financing through Wisetack. Applying is quick, and it lets Keystone Heights homeowners move forward with the system they need on a schedule that works for their budget.
Powered by Wisetack
Every new residential system comes with a 10-year parts warranty from the manufacturer.
For added protection, we now offer an optional 10-year labor warranty—giving you full coverage and long-term peace of mind. This labor warranty must be added within six months of installation, so if we installed your system within the past six months, you’re still eligible!
Questions & Answers
Service Area
Lake Area Heating & Air has been serving commercial properties across Clay & Putnam County since 2008. If you operate a light commercial building, multi-tenant property, or small warehouse in any of these areas, we can help.
Counties We Serve: Clay, Putnam, Bradford, Baker, Union & Lake, plus parts of Alachua (including Gainesville) & Marion
If your town isn’t listed, give us a call — we may still be able to help. Reach out and we’ll let you know if you’re in our service area.
Customer Reviews
Word of mouth means everything in a community this size, and we’re proud of the reputation we’ve built one job at a time across Keystone Heights, Clay and Putnam County.
More Services
Commercial buildings need clean, healthy air. We offer air filtration and UV light systems that integrate with your RTU to improve indoor air quality for tenants and staff.
For properties with rooftop units that also need backup or supplemental heating, we handle furnace installation.
Many commercial properties benefit from heat pump technology for efficient heating and cooling. We design and install heat pump systems that complement your RTU or stand alone.
Some light commercial buildings use standalone package units instead of rooftop systems. We install, repair, and maintain those too.
Enroll your RTU in a scheduled maintenance plan so you never miss a seasonal checkup, filter replacement, or preventive service.
RTU replacement is a capital expense. We offer flexible financing through Wisetack so you can upgrade without breaking the budget.
We thank veterans, first responders, seniors, and teachers with community discounts, available upon request when you schedule.
Your Trusted Partner
Your rooftop unit is too important to neglect—and too expensive to replace without planning. Lake Area Heating & Air brings 18 years of commercial HVAC experience to every commercial property we serve. Whether you need a repair, a seasonal maintenance plan, or a roadmap to your next RTU installation, we deliver honest diagnostics, transparent pricing, and the accountability that comes with veteran ownership.
The difference between a system that breaks down unexpectedly and one that runs reliably for years to come is the attention you give it today. Give us a call, let’s assess your unit, and build a service plan that keeps your commercial space comfortable and your downtime minimal. If your property also has central AC or heat pump systems, we handle those too—one trusted partner for all your commercial climate needs.
We understand that commercial HVAC is not separate from your business—it’s part of your operation. We treat it that way.
Whether you need a repair, a seasonal maintenance plan, or a roadmap to your next RTU installation, we deliver honest diagnostics, transparent pricing, and the accountability that comes with veteran ownership.
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