Commercial HVAC
New installation, system replacements, retrofits, and emergency service for office, retail, restaurant, and light industrial. We size, install, and commission.
Sierra Mechanical installs, replaces, and services commercial HVAC systems across California - from 5-ton retail spaces to 200+ ton multi-tenant office complexes. We work directly with general contractors, property managers, and end-users on new construction, equipment replacement programs, and mechanical retrofits.
Our crews are factory-trained on the major equipment lines (Trane, Carrier, Lennox, Daikin, Mitsubishi VRF) and certified for refrigerant handling under EPA 608. Every project includes proper load calculations (Manual N for commercial, Title 24 compliance docs for California), engineered submittals, and full commissioning with start-up reports delivered to your closeout package.
For tenant improvement work, we coordinate with your structural, electrical, and plumbing trades from day one. Our project managers attend your weekly OAC meetings, push RFIs through promptly, and hand over O&M manuals + as-builts on substantial completion - not three months after the certificate of occupancy.
Our process
- Rooftop Units (Trane, Carrier, Lennox, Daikin, York)
- VRF & VRV Systems (Mitsubishi, Daikin, LG)
- Variable Air Volume (VAV) & Constant Volume
- Mini-Split & Multi-Zone Systems
- Make-Up Air Units (Greenheck, RuppAir, Captive-Aire)
- Building Automation / BMS (BACnet, Niagara, Honeywell)
- Indoor Air Quality / IAQ (UV-C, MERV 13+, ERV)
- TAB Coordination (NEBB / AABC certified)
- LEED-Eligible Equipment & Refrigerant Compliance
- Title 24 Energy Compliance
- Refrigerant Recovery & EPA 608
Sheet Metal Fabrication
4,800 sq ft in-house shop in Rancho Cordova. CNC plasma, brake, roll forming, TIG welding. SMACNA spec on every job. We do not outsource fabrication.
Our Rancho Cordova fabrication shop runs five days a week with two CNC plasma tables, three brake presses, a coil line, and six welding stations. Every duct, fitting, and hood that ships to your jobsite was cut, brake-formed, and welded under our roof - by our employees - to SMACNA HVAC Duct Construction Standards (4th Edition).
For restaurant work, we fabricate to NFPA 96 grease duct standards: continuous welds, liquid-tight, leak-tested at 1 inch w.c. before it leaves the shop. Type 304 stainless hoods with welded seams (no caulk, no rivets) and field-mountable filters. Health departments across California (Sacramento County, Alameda, LA County, San Diego) recognize our spec sheet on sight.
Architectural sheet metal - column wraps, soffit panels, mansard cladding, custom signage substrates - gets the same treatment. We powder-coat in-house in any RAL color, so finish color doesn't become a 6-week lead time on your schedule.
Our process
- SMACNA HVAC Duct Construction Standards (Class 1 / 2 / 3)
- Custom Fittings, Transitions, & Offsets
- Stainless Steel Welded Hoods (Type 304 / 430)
- Galvanized & Spiral Round Duct
- Black Iron / Welded Grease Duct (NFPA 96)
- Architectural Metal Panels & Cladding
- Industrial Exhaust Stacks & Plenums
- Custom Curbs, Hoods, & Roof Penetrations
- Powder Coat Finishing (in-shop)
- TIG / MIG Welding (Stainless, Aluminum, Mild Steel)
- Insulated Double-Wall Duct
Kitchen / QSR Ventilation
Restaurant and quick-service ventilation built to NFPA 96 and the brand's playbook. Type I & II hoods, MUA, exhaust risers, pollution control, grease duct. Trusted by Burger King, Habit Burger, Dutch Bros, Popeyes, Eureka!, Raising Cane's, Panda Express, and the GCs that build their stores across California.
Sierra Mechanical is one of the few California sheet metal contractors that specializes in restaurant ventilation as a primary business line, not a side scope. We have completed kitchen ventilation packages for Burger King, Habit Burger, Wendy's, Dutch Bros, KFC, Taco Bell, Wingstop, Jack in the Box, Raising Cane's, Popeyes, Panda Express, Chipotle, BJ's, Roundtable Pizza, Eureka!, and dozens of regional and independent restaurant groups across the state.
We know NFPA 96 cold. We know each franchisor's mechanical playbook (BK FZP-3, Wendy's 2025 Image Activation, KFC Reimagine, Taco Bell Defy, Habit's prototype 2024). We know which California county health departments want stamped MEP drawings vs. just a hood cut sheet (LA County, Alameda, Santa Clara) and which approve in-house. We know which inspectors want to see the welded duct pressure-tested in person before it gets boxed in.
For multi-unit rollout programs (BK refresh, Habit new-build, Dutch Bros expansion), we offer dedicated PM teams that travel the schedule with you - same crew, same shop drawings, same submittal package, replicated across 5, 10, 30 stores. One spec sheet, one supplier, one number to call when something needs adjustment.
Our process
- Type I (grease) & Type II (heat/steam) Hood Systems
- NFPA 96 Compliance - design through commissioning
- Make-Up Air Coordination (Captive-Aire, RuppAir, Greenheck)
- Welded Black Iron Grease Duct, Liquid-Tight
- Pollution Control Units (ESP, UV-C, Activated Carbon)
- Multi-Tenant & Multi-Floor Riser Coordination
- Health Dept. Submittals (CA county-specific)
- Franchisor Spec Compliance (BK, Wendy's, KFC, etc.)
- Ansul / Pyro-Chem Fire Suppression Coordination
- Exhaust Fan Roof Curbs & Vibration Isolation
- CKV Demand-Control Ventilation
Tenant Improvements
Mechanical scope on TI buildouts. Design-assist, permit drawings, install, and turnover. We hit your milestone date or we tell you why on day one - not week six.
Tenant improvement mechanical work is its own discipline - different from new construction. You're tying into existing rooftop units, working around an active landlord BMS, navigating Title 24 retrofit requirements, and hitting a hard turnover date because the tenant's lease is starting whether you're done or not.
We have completed mechanical scope on more than 600 TI projects across California: office tenant fit-outs (5K to 100K sq ft), retail buildouts (single shops to mall-wide refresh programs), medical and dental office TIs, restaurants taking over second-generation spaces, and light industrial conversions. Our PMs sit in your weekly OAC meetings, manage submittals through your architect of record, and coordinate the trade stack so we don't hold up your ceiling close-up.
For TI work specifically, we offer design-assist engineering - we can take a basis-of-design from your architect or a flagged shell drawing and produce stamped MEP drawings, equipment selections, and Title 24 compliance docs in under three weeks. That keeps you moving while the design team finishes interior architecture.
Our process
- Design-Assist Mechanical Engineering
- Permit Drawings & Title 24 Submittals
- Demo & Existing-System Tie-In
- Equipment Procurement & Expediting
- Install & Factory Start-Up
- Test & Balance Coordination (NEBB/AABC)
- Punch & Closeout Documentation
- O&M Manuals + As-Built Drawings
- Commissioning Cx Reports
- ADA & Code Coordination
- BMS Integration with Existing Building
Our process
Same process on every service line.
HVAC, fabrication, kitchen ventilation, or TI - one estimating team, one fab shop, one field organization.
Plans & takeoff
Send PDF or DWG. Our estimators measure in-house - budgetary numbers in 4 business hours.
Hard bid & award
Itemized scope, exclusions, and alternates in 5 days. Submittals within 10 days of NTP.
Self-perform install
W-2 crews and our fab shop. One PM, one schedule, no layered subs on core scope.
Closeout
TAB, O&M manuals, as-builts, and warranty package - turnover ready for your GC closeout.
Scope a service package
Tell us which capabilities you need on the bid form - we itemize HVAC, fab, hoods, and TI in one proposal.
Next step - takeoff & budgetary pricing
Got a multi-trade scope? Bundle it. We'll pull one bid.
Send the package - HVAC, fab, hoods, TI mechanical. You get one PM, one submittal stack, one number.