Chicago's Authorized Lennox dealer Since 2010 | D's Air & Heating
D's Air & Heating is an Authorized Lennox dealer serving Chicago since 2010, providing expert Lennox installation, repair, maintenance, and replacement services throughout Chicago and the surrounding communities.
Lennox Landmark / L / LC Series Commercial Rooftop Units — D's Air & Heating, Inc.
Expert installation and replacement of Lennox Landmark, L Series, and LC Series commercial rooftop units with full mechanical verification and rooftop access planning.
A $95.35 Service Call Fee is Required for All Service Appointments, Including Warranty Claims.
Series
L · LC · Landmark
Tonnage Range
3T – 50T
Voltage
208/230V · 460V · 575V
IL License
#2183457
Commercial Rooftop Units — D's Air & Heating, Inc.
D's Air & Heating, Inc. provides full commercial rooftop HVAC installation services for all major manufacturers, including Daikin, Lennox, Carrier, Trane, York, AAON, Goodman, and Rheem. Commercial rooftop systems require precise sizing, curb compatibility, electrical and gas verification, crane logistics, and municipal permit review. Because every commercial building is different, pricing cannot be displayed upfront and is determined only after a complete scope review and site survey.
Commercial Rooftop Models Supported
Daikin
DSG Series
Lennox
Landmark / L / LC Series
Carrier
WeatherMaker / WeatherMaster
Trane
Precedent / Voyager
York
Predator Series
AAON
RN / RQ / RL Series
Goodman
Commercial Rooftop
Rheem
Commercial Rooftop
Commercial Pricing Process
Submit a Commercial Job Request
All commercial projects begin with a submitted estimate form or direct call.
Scope Review
We evaluate building type, rooftop access, electrical service, gas piping, curb condition, and equipment requirements.
Site Survey
Required to confirm crane access, curb adapter needs, permit requirements, and installation logistics.
Final Price Determination
Pricing is issued only after the complete scope is verified. Internal formulas, multipliers, and installation baselines are not shown publicly.
What Affects Commercial Rooftop Pricing
All commercial rooftop HVAC job requests must be submitted before pricing can be provided.
Final pricing is determined only after reviewing the full scope of work and completing a commercial site survey. This ensures accurate, safe, and code-compliant installation for every commercial building.
Don't “FREEZE” — Call D's Air & Heating, Inc.
Customer-Choice Add-Ons
Lennox-specific accessories available at time of installation. Pricing provided at quote.
Lennox Curb Adapter
Adapts new Lennox unit to existing roof curb — avoids full curb replacement and reduces installation cost.
Lennox SmartAir Economizer
Enables free cooling via outside air when conditions allow — reduces energy costs in Chicago's shoulder seasons.
Lennox Hail Guards
Protective coil guards for rooftop units in hail-prone areas — preserves coil integrity and warranty.
Lennox CO2 Sensor
Demand-controlled ventilation sensor for occupied commercial spaces — meets ASHRAE 62.1 requirements.
Lennox Smoke Detector
Integrated smoke detection for code-compliant commercial installations.
Lennox iComfort Thermostat
Lennox iComfort smart thermostat — Wi-Fi enabled, compatible with Landmark and LC Series for advanced scheduling and remote control.
Lennox MERV-13 Filter Upgrade
High-efficiency filtration upgrade for improved indoor air quality — captures fine particles and allergens.
Add-on pricing provided at time of quote. Ask your technician about compatibility with your specific model and roof configuration.
Lennox Commercial Rooftop Units — L, LC & Landmark Series
Installed price calculated at dealer cost × 2.2 + $3,200 base install. Includes full installation, start-up, and Lennox manufacturer warranty. Crane rental, permit, and traffic control costs are additional — determined at site survey.
Lennox Commercial Rooftop Units
From light commercial 3-ton L Series units to 50-ton Landmark Series flagship systems, Lennox commercial rooftop units are engineered for demanding applications. D's Air & Heating, Inc. installs the full Lennox commercial line across Chicago and surrounding areas — full installation, start-up, and Lennox manufacturer warranty included.
L Series
Light commercial gas/electric rooftop units — single-phase and three-phase configurations.
LC Series
High-efficiency commercial rooftop units with advanced controls and iComfort compatibility.
Landmark Series
Premium commercial rooftop units — Lennox's flagship commercial line for demanding applications.
| Model Family | Description | Tonnage Range | Phase | Voltage | Rating | Quote |
|---|---|---|---|---|---|---|
| KGA | Gas/Electric Rooftop — Landmark Series | 6T – 50T | 3PH | 208/230V · 460V · 575V | 5 | Get Quote |
| KCA | Cooling Only Rooftop — Landmark Series | 6T – 50T | 3PH | 208/230V · 460V · 575V | 5 | Get Quote |
| KHA | Heat Pump Rooftop — Landmark Series | 6T – 25T | 3PH | 208/230V · 460V | 5 | Get Quote |
Payment & Financing Options
All Lennox rooftop installations by D's Air & Heating, Inc. can be configured with flexible payment options, including credit card, ACH, and commercial terms where applicable.
Search Tags — Lennox Rooftop Models
Lennox Landmark Commercial Rooftop Installation — Chicago
D's Air & Heating, Inc. installs Lennox Landmark rooftop units for commercial buildings across Chicago, offering high-efficiency cooling solutions designed for long-term reliability. Lennox Landmark systems provide advanced two-stage cooling, improved humidity control, and compatibility with modern economizers and smart building automation. Our installations include full EPA-Matched verification using AHRI-certified combinations to ensure compliance with SEER2, EER2, and IEER commercial standards. We manage every step of the installation process, including mechanical permits, crane lifts, curb adapter fabrication, and traffic control coordination. Lennox Landmark rooftop units are ideal for office buildings, retail stores, restaurants, and industrial facilities requiring dependable performance and reduced energy consumption. D's Air & Heating, Inc. offers Good, Better, and Best configurations, including standard Landmark units, LC Series upgrades, and fully integrated smart-control systems. Our technicians ensure proper airflow setup, economizer calibration, and complete startup verification. Businesses choose Lennox Landmark systems for their durability, quiet operation, and compatibility with advanced filtration and IAQ upgrades. D's Air & Heating, Inc. provides fast installation, clean workmanship, and long-term service support, making us a trusted commercial HVAC partner throughout Chicago.
Commercial Rooftop Units — D's Air & Heating, Inc.
D's Air & Heating, Inc. provides full commercial rooftop HVAC installation services for all major manufacturers, including Daikin, Lennox, Carrier, Trane, York, AAON, Goodman, and Rheem. Commercial rooftop systems require precise sizing, curb compatibility, electrical and gas verification, crane logistics, and municipal permit review. Because every commercial building is different, pricing cannot be displayed upfront and is determined only after a complete scope review and site survey.
Commercial Rooftop Models Supported
Daikin
DSG Series
Lennox
Landmark / L / LC Series
Carrier
WeatherMaker / WeatherMaster
Trane
Precedent / Voyager
York
Predator Series
AAON
RN / RQ / RL Series
Goodman
Commercial Rooftop
Rheem
Commercial Rooftop
Commercial Pricing Process
Submit a Commercial Job Request
All commercial projects begin with a submitted estimate form or direct call.
Scope Review
We evaluate building type, rooftop access, electrical service, gas piping, curb condition, and equipment requirements.
Site Survey
Required to confirm crane access, curb adapter needs, permit requirements, and installation logistics.
Final Price Determination
Pricing is issued only after the complete scope is verified. Internal formulas, multipliers, and installation baselines are not shown publicly.
What Affects Commercial Rooftop Pricing
All commercial rooftop HVAC job requests must be submitted before pricing can be provided.
Final pricing is determined only after reviewing the full scope of work and completing a commercial site survey. This ensures accurate, safe, and code-compliant installation for every commercial building.
Don't “FREEZE” — Call D's Air & Heating, Inc.
Ready to Install a Lennox Rooftop Unit?
Call D's Air & Heating, Inc. for a commercial quote. We service Chicago and surrounding areas — no contracts required.
5.0 · Trusted by Chicago businesses since 2009
Why Chicago Homeowners Trust D's Air & Heating
Licensed & Insured
IL License #2183457
Serving Chicago
Since 2009
Authorized Dealer
Multiple Brands
No Contracts
Ever — Guaranteed
Permit Pulled
Every Installation
Professional Standards
Code-Compliant Work
EPA Certified
Mainstream Engineering
R-410A Certified
Mainstream Engineering
Why Choose D's Air & Heating, Inc.?
Chicago's trusted HVAC company since 2009 — licensed, insured, and committed to honest workmanship on every job.
Experience Since 2009
D's Air & Heating has served Chicago homeowners and businesses since 2009. Over 15 years of local HVAC experience means we've seen every type of system, every Chicago building configuration, and every challenge the city's climate presents.
Manufacturer-Trained Technicians
Our technicians receive ongoing manufacturer training and certification. We install Lennox, Goodman, Amana, Daikin, Sinclair, Weil-McLain, Peerless, and other leading brands — and we know each system inside and out.
Licensed, Insured & Permitted
D's Air & Heating holds Illinois HVAC License #2183457 and carries full liability insurance. We pull City of Chicago permits on every installation — protecting you legally and ensuring the work meets code.
Honest Recommendations
We tell you what you need — not what generates the highest invoice. If your system can be repaired cost-effectively, we'll say so. If replacement makes more sense, we'll explain exactly why. No pressure, no upselling.
Local Chicago Expertise
We know Chicago's housing stock — two-flats, greystones, bungalows, vintage buildings with steam heat, modern construction with forced air. We size and install equipment for the specific demands of Chicago homes and Chicago winters.
Long-Term Customer Support
Our relationship doesn't end at installation. We register your equipment for warranty, remain available for follow-up questions, and provide ongoing maintenance to keep your system running at peak efficiency for years.
Commercial HVAC in Chicago — What Building Owners Should Know
Commercial vs. Residential HVAC
Commercial HVAC systems are designed for larger spaces, higher occupancy loads, and continuous operation. Rooftop packaged units (RTUs) are the most common commercial heating and cooling solution in Chicago — they combine heating, cooling, and ventilation in a single cabinet mounted on the roof. Commercial systems require more complex controls, larger electrical service, and more rigorous maintenance than residential equipment.
Rooftop Unit Selection and Sizing
Commercial RTUs are sized in tons of cooling capacity, from 3 tons for small retail spaces to 50+ tons for large commercial buildings. Proper sizing requires calculating cooling load (heat gain through walls, roof, windows, occupancy, and equipment) and heating load. Oversized RTUs short-cycle, causing temperature swings and premature compressor wear. D's Air performs commercial load calculations on every project.
Permits and Code Compliance
Commercial HVAC work in Chicago requires mechanical permits from the City of Chicago Department of Buildings. Work must comply with the Chicago Building Code, ASHRAE 90.1 energy standards, and ASHRAE 62.1 ventilation requirements. D's Air handles all permit applications and inspections for commercial projects.
Preventive Maintenance Contracts
Commercial HVAC equipment operates year-round under heavy loads. Preventive maintenance — quarterly or semi-annual inspections, filter changes, coil cleaning, belt and bearing checks, refrigerant verification — extends equipment life and prevents costly emergency failures. D's Air offers commercial maintenance contracts tailored to your building's equipment and schedule.
What to Expect From D's Air Commercial HVAC Services
Site Assessment
We visit your building, assess existing equipment and infrastructure, and identify project requirements.
Engineering
We perform load calculations, equipment selection, and permit drawings for your project.
Permitting
We handle all City of Chicago permit applications and coordinate inspections.
Installation
Our commercial crew installs equipment to code, including crane lifts for rooftop units.
Commissioning
We test all equipment, verify airflow and refrigerant charge, and document system performance.
Ongoing Support
We offer preventive maintenance contracts and priority emergency service for commercial clients.
D's Air Commercial HVAC Standards
- Commercial load calculation — cooling and heating
- Equipment selection per ASHRAE 90.1 energy standards
- Ventilation design per ASHRAE 62.1
- City of Chicago mechanical permit on every project
- Crane lift coordination for rooftop equipment
- Curb adapter fabrication for non-standard roof openings
- BAS/BMS integration where required
- Commissioning documentation provided
- Preventive maintenance contracts available
What Our Customers Say
Based on Google Reviews — D's Air & Heating, Inc.
Marcus T.
Furnace Replacement
"D's Air & Heating did an outstanding job replacing my furnace. Darryl was professional, on time, and explained everything clearly. The installation was clean and the system works perfectly. Highly recommend."
Latoya W.
Boiler Repair
"Called D's Air when my boiler stopped working in January. They came out the same day, diagnosed the problem quickly, and had it running again within hours. Fair pricing and excellent service."
James R.
AC Installation
"Installed a new central AC system for us this summer. The crew was respectful of our home, cleaned up after themselves, and the system runs quietly and efficiently. Very satisfied."
Ready to Work With Chicago's Trusted HVAC Company?
D's Air & Heating, Inc. — Serving Chicago Since 2009. Licensed, Insured, No Contracts.
Why Choose Lennox?
D's Air & Heating is an Authorized Lennox dealer — Serving Chicago Since 2010.
Lennox products are recognized for advanced technology, quiet operation, exceptional efficiency ratings, and dependable performance in Chicago's demanding climate. Lennox systems are engineered for long-term reliability, comfort, and energy savings.
Why Choose D's Air & Heating?
D's Air & Heating is an Authorized Lennox dealer — Serving Chicago Since 2010.
Since 2010, our company has helped Chicago homeowners and businesses install and service Lennox equipment. We provide expert sizing, installation, startup, testing, maintenance, and long-term support for every Lennox product we install.
Lennox Commercial Rooftop Units Features
- Commercial-grade rooftop heating and cooling
- High-efficiency operation
- Compact footprint for commercial buildings
- Smart controls and BAS compatibility
- Lennox manufacturer warranty coverage
- Quiet, reliable operation
- Designed for Chicago commercial applications
Professional Lennox Installation
Every installation includes equipment evaluation, proper system sizing, removal of existing equipment, professional installation, safety testing, airflow verification, and system commissioning to manufacturer standards. City of Chicago mechanical permits included on every installation.
Financing & Warranties
D's Air & Heating offers flexible financing options for qualified customers on all Lennox equipment installations. Ask about current Lennox rebates, manufacturer promotions, and seasonal offers available through our dealership.
- Lennox 10-Year Limited Parts Warranty — registered at installation
- Lennox 20-Year Heat Exchanger Warranty (select furnace models)
- 2-Year D's Air & Heating Workmanship Warranty
- Financing available for qualified customers — ask about current offers
- Current Lennox rebates and manufacturer promotions available
- No-contract service — no annual maintenance agreement required
Request Your Free Estimate
D's Air & Heating is an Authorized Lennox dealer — Serving Chicago Since 2010.
Contact D's Air & Heating today to schedule a free Lennox Commercial Rooftop Units installation estimate and discover why Chicago homeowners continue to choose Lennox for dependable comfort and efficiency.
(773) 940-0965