Commercial HVAC Services in Lexington, KY
Commercial HVAC work runs on a different clock than residential. A restaurant cooling system that quits at 11 a.m. on a Saturday in July means closed for the lunch shift and possibly the dinner shift — revenue that doesn’t come back. An office building’s HVAC failure means productivity loss across hundreds of occupants, complaints to facilities management, and potential lease-violation conversations with the landlord. A medical office’s failed humidity control can put exam-room equipment specs out of compliance. The stakes differ from a single-family home’s no-cool call, and the response should differ accordingly. Lexington Heating and Air provides full commercial HVAC services across Fayette County: installation of new equipment, repair of failed systems, replacement when repair no longer makes economic sense, and the project management that coordinates HVAC work with general contractors, electrical contractors, and code officials on larger commercial projects.
Commercial HVAC We Install and Service
Rooftop Packaged Units (RTUs)
The workhorse of light commercial HVAC in this market. Self-contained units mounted on the roof that handle both heating and cooling in a single cabinet, with ductwork connecting to the interior space. Capacities from 3 to 25+ tons; gas heat or heat pump configurations; single-zone or multi-zone variants. Most restaurants, retail stores, small offices, and similar buildings in Lexington run on RTUs. See our rooftop units page for more.
Split Systems (Light Commercial)
Similar architecture to residential split systems but scaled up — an outdoor condenser connected to an indoor air handler, with refrigerant lines between. Common in smaller commercial buildings, additions to existing spaces, and applications where rooftop mounting isn’t practical. Capacities typically 2 to 5 tons per system; multiple systems often serve different zones in a single building.
Variable Refrigerant Flow (VRF)
Higher-end technology that uses a single outdoor unit to serve multiple indoor units throughout a building, modulating refrigerant flow to match the demand of each zone independently. Excellent for buildings with simultaneous heating and cooling loads (interior zones cooling, perimeter zones heating in winter, for instance), buildings where energy efficiency matters, and renovations where running new ductwork isn’t practical. Higher first cost than RTUs; meaningfully better operational characteristics for the right applications.
Commercial Boilers
Larger commercial boilers serve buildings with hydronic distribution (radiators, baseboards, fan coils), domestic hot water with high demand profiles, and process heat applications. Different scale than residential boilers, with different code requirements and operator licensing for larger units.
Air-Cooled and Water-Cooled Chillers
For buildings with chilled-water cooling distribution — larger commercial buildings, medical facilities, light industrial. Air-cooled chillers mount outdoors and reject heat to ambient air; water-cooled chillers reject heat through a cooling tower. Specialty work outside the scope of most residential HVAC contractors.
Makeup Air and Exhaust Systems
Restaurants in particular require coordinated kitchen hood exhaust with makeup air (replacing the air the hood removes) to keep the building from going into deep negative pressure that affects HVAC operation, comfort, and gas appliance combustion safety. This integration is one of the differences between residential and commercial work.
Common Commercial HVAC Projects
- Restaurant build-outs and renovations — sizing equipment to handle kitchen heat loads, integrating hood exhaust with makeup air, coordinating with general contractors on space planning.
- Office tenant build-outs — splitting building-level systems to serve new tenant spaces, adding controls for tenant submetering, integrating with building management systems.
- Retail store openings — new RTU installation, ductwork for retail floor space, ventilation per occupancy load.
- Medical office HVAC — humidity control per code requirements, exam-room ventilation, equipment heat loads from sterilization and imaging.
- RTU replacement — older rooftop units past end-of-life replaced with new equipment, often with crane work for unit set, electrical and gas service modifications, controls upgrade.
- Light industrial process cooling — specialized cooling for production equipment, sometimes with combined comfort and process loads.
- Building automation integration — tying HVAC into building management systems for centralized control, scheduling, and monitoring.
- Refrigerant compliance updates — equipment retrofits or replacements as R-410A continues phasing out toward R-454B and other lower-GWP refrigerants.
The Code and Compliance Landscape
Commercial HVAC operates under a more complex regulatory environment than residential:
- ASHRAE 62.1 Ventilation for Acceptable Indoor Air Quality. Specifies minimum outdoor air requirements based on occupancy type and density. Restaurant dining rooms, office spaces, classrooms, exam rooms, and other commercial uses each have specific requirements.
- ASHRAE 90.1 Energy Standard for Buildings Except Low-Rise Residential. Energy efficiency requirements typically more stringent than residential code, affecting equipment selection, controls, economizers, and envelope coordination.
- International Mechanical Code (IMC). Commercial provisions for ductwork, ventilation, refrigeration, and combustion equipment.
- International Fuel Gas Code (IFGC). Commercial gas piping requirements, including sizing, materials, testing, and equipment connection.
- EPA refrigerant management regulations. Commercial systems above specified refrigerant charges (typically 50 pounds) have documentation, leak detection, and repair requirements that residential systems don’t face.
- Local LFUCG amendments. Lexington-specific code amendments affecting commercial mechanical work.
- Kentucky state contractor licensing. Commercial HVAC work requires Kentucky HVAC contractor licensing through the Department of Housing, Buildings and Construction.
The compliance complexity is part of why commercial HVAC work belongs with contractors who do it regularly, not with residential-focused contractors taking occasional commercial jobs as opportunities arise.
What Sets Our Commercial Work Apart
- Project management. Coordination with general contractors, electrical, structural (for rooftop unit placement), and code officials on larger projects. We show up to the meetings; we hit the deadlines; we communicate with everyone who needs to be in the loop.
- Equipment knowledge across commercial categories. RTUs, split systems, VRF, boilers, and basic chiller work, plus the controls and building management integration that ties them together.
- Refrigerant management compliance. EPA-required documentation, leak detection, and repair procedures on equipment subject to those requirements.
- Restaurant kitchen ventilation experience. The hood/makeup air integration that residential contractors don’t routinely handle.
- Service-contract structure for ongoing work. See our service contracts page for the maintenance agreements that match commercial uptime requirements.
- After-hours and weekend availability for both repair calls and maintenance work scheduled around your operating hours.
The Replacement Decision in Commercial Settings
The residential repair-vs-replace decision applies in commercial settings too, but the math weights differently. Operational downtime carries direct revenue cost on top of repair expense. Energy code requirements for new equipment often mean significant efficiency upgrades come with replacement. Tax depreciation schedules and Section 179 expensing may make replacement more attractive than the residential math would suggest. Refrigerant transition affects commercial timing, particularly for larger systems still on R-22 or aging R-410A equipment. We work through the specific economics for your situation with the building’s operational profile in mind, not generic residential rules of thumb.
Frequently Asked Questions
- Do you do commercial HVAC in Lexington?
- Yes. We install, repair, replace, and maintain commercial HVAC across Fayette County, covering rooftop packaged units, light commercial split systems, variable refrigerant flow systems, commercial boilers, and the makeup air and exhaust systems that restaurants and similar buildings require. Our experience spans restaurants, offices, retail, medical facilities, multi-tenant buildings, light industrial, and educational facilities.
- What size buildings do you handle?
- Light commercial through mid-size commercial — typically buildings up to roughly 50,000 square feet, with HVAC systems in the 5 to 100-ton range. Larger institutional and industrial projects with complex chilled-water plants, large central plants, or specialized industrial process cooling are outside our typical scope; we’ll be honest about whether your project fits our capabilities.
- How long does commercial HVAC installation take?
- Depends on scope. A straightforward RTU replacement on an existing curb with no electrical or gas modifications can typically be completed in a single day with crane scheduling. A new RTU on new curb with electrical and gas service work takes longer. A full build-out with multiple systems, ductwork, controls integration, and coordination with other trades follows the project schedule, typically weeks for the HVAC scope. We provide realistic timelines as part of the project bid.
- Do you handle the kitchen exhaust integration on restaurants?
- Yes. Restaurant kitchen hood exhaust requires coordinated makeup air to replace the air the hood removes; without proper makeup air, the building goes into negative pressure that affects HVAC operation, comfort, gas appliance combustion safety, and the kitchen hood’s actual capture effectiveness. We design, install, and service the integrated systems.
- Can you work around our operating hours?
- For most work, yes. Maintenance is typically scheduled during off-hours, early morning, or evenings based on your operating schedule. Repairs vary based on urgency: critical failures need immediate response regardless of hour, less-critical issues can be scheduled around the business. Service contract customers get priority dispatch during their highest-priority windows. We discuss scheduling honestly during project planning.
Schedule a Commercial HVAC Project Conversation
RTU replacement, restaurant build-out HVAC scope, office tenant fit-out, medical facility upgrade, or service-contract setup for ongoing work — the project conversation starts with a walk-through of the building, the existing equipment, the operational constraints, and the timeline you’re working toward. We bid scope itemized and we coordinate with the other trades the project needs. Across Lexington and Fayette County.
- Phone: (859) 215-5241
- Address: 343 Cassidy Ave, Lexington, KY 40502
- Email: [add business email before publishing]