Lochinvar Commercial Boiler Installation in Chicago
Lochinvar Commercial offers high-efficiency condensing boilers for schools, hospitals, hotels, and large commercial buildings. Their CREST and FTXL series deliver up to 99% thermal efficiency with modulating burners and advanced controls — built for Chicago's most demanding commercial applications.
Why D's Air & Heating, Inc. Installs Lochinvar Commercial Boilers
Lochinvar's CREST commercial condensing boiler is one of the most efficient available, with a 20:1 turndown ratio and stainless steel heat exchanger. Their SMART SYSTEM controls integrate seamlessly with building automation systems for maximum energy management.
Lochinvar Commercial Boiler
Lochinvar CREST commercial condensing boilers reach up to 99% thermal efficiency — among the highest available for commercial applications.
Lochinvar Commercial Boiler
CREST series modulates from 5–100% capacity — maximum comfort and minimum fuel waste across all load conditions.
Lochinvar Commercial Boiler
Integrated SMART SYSTEM controls provide full BAS integration, remote monitoring, and predictive diagnostics.
Lochinvar Commercial Boiler
Direct vent with standard PVC pipe — no expensive stainless liner required, even on large commercial installations.
Lochinvar Commercial Boiler
Trusted in Chicago schools, hospitals, hotels, and large commercial buildings for their reliability and efficiency.
Lochinvar Commercial Boiler
Multiple CREST units can be cascaded for large buildings — scalable capacity with built-in redundancy.
Lochinvar Commercial — Available Models
Installed prices include equipment, labor, permits, startup, and commissioning.
Service Call Policy — D's Air & Heating, Inc.
- The service call fee covers travel and full diagnostics only.
- The service call fee is not deducted from the total cost of any repair or installation.
- After diagnostics, we provide clear repair or replacement options with upfront, itemized pricing.
- Once you approve the Maintenance Agreement, your 15% discount becomes active and is automatically applied to the repair or installation estimate.
- The 15% discount does not apply to the initial service call fee.
A $95.35 Service Call Fee is Required for All Service Appointments, Including Warranty Claims.
Compare Commercial Boiler Brands
See how Lochinvar Commercial stacks up against Cleaver-Brooks, Fulton, and other commercial brands we install.
Ready for a Lochinvar Commercial Quote?
Call us or book online. We'll assess your facility and provide a detailed commercial proposal.
IL License #2183457 · Serving Chicago & Surrounding Areas · No Contracts Required
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.