For customers· 4 min read

Building Automation Systems: How to Choose the Best Integrator

Compare BAS providers on system flexibility, energy efficiency reporting, user interface, and maintenance contracts.

Building Automation Systems (BAS) can slash your facility's energy costs by 15–30%, but only if you pick an integrator who understands your actual production workflow, not just software. The wrong partner leaves you with a system that looks good on paper but fails to integrate with legacy PLCs, creates downtime during commissioning, or drains budget on unnecessary sensors. Here's how to find one who delivers.

Define Your Current Setup and Goals

Before you contact a single integrator, map out what you're working with. Document your existing control systems—whether that's Allen-Bradley CompactLogix, Siemens S7-1200, or a patchwork of both—because compatibility issues are a leading cause of failed rollouts.

Clarify what you want to automate: HVAC scheduling, compressed air monitoring, motor soft-starts, occupancy-linked lighting, or a complete facility energy dashboard. A facility doing selective HVAC control needs a different integrator skillset than one managing process interlocks on a production line.

Set a realistic budget. BAS integrator costs typically range from $15,000 to $100,000+ depending on facility size (under 50,000 sq ft versus 500,000+ sq ft) and system complexity. Smaller retrofits often cost $8–12 per square foot; new builds with centralized controls run $5–10. Know your range before calling anyone.

Evaluate Technical Credentials and Experience

Look for integrators who hold certifications specific to your equipment brands. A Siemens Certified Professional or Schneider Electric Platinum Partner has proven competency and often prioritizes your job alongside their other work.

Ask for references from similar facilities—not just size-wise, but industry-wise. A food-processing plant's control needs differ vastly from a pharmaceutical cleanroom or a warehouse. Request case studies showing before/after energy consumption data, not just pretty system diagrams.

Check their experience with your legacy systems explicitly. If you're running a 20-year-old Honeywell system alongside newer gear, confirm they've retrofitted mixed-generation setups without full replacement (which is often unnecessary and expensive).

Review Their Integration Approach

The best integrators don't rip-and-replace. They assess whether your existing sensors, actuators, and controllers can be leveraged, which saves 20–40% on hardware costs.

Ask these specific questions:

  • Do they use open protocols (BACnet, Modbus, MQTT) or proprietary solutions? Open protocols reduce vendor lock-in.
  • How do they handle data security? Especially critical if your BAS connects to any networked system. Expect them to discuss network segmentation, authentication, and regular audits.
  • What's their commissioning timeline? Honest integrators won't promise a 100,000 sq ft facility done in two weeks. Eight to twelve weeks is realistic for comprehensive testing.
  • Do they offer 24/7 support post-launch? A down BAS costs you real money in wasted energy or production delays.

Check Licensing, Insurance, and Track Record

Verify the integrator holds proper electrical contractor licensing in your state (requirements vary). Request proof of general liability and errors & omissions insurance—you want protection if a failed integration causes production loss or safety issues.

Pull complaint records from your state's contractor licensing board and the Better Business Bureau. One or two resolved complaints is normal; a pattern of unresolved disputes is a red flag.

Make Your Comparison and Decision

Get detailed proposals from at least three integrators, not just pricing but itemized scope: hardware costs, labor (hourly rate and estimated hours), software licensing, training, and post-warranty support fees.

Compare not just price but timeline, warranty terms (typically 1–2 years), and whether they include staff training. A $5,000 cheaper quote means nothing if you need expensive outside support later.

Platforms like Mercoly let you compare and review trusted Industrial Electrical & Automation integrators side by side, saving weeks of outreach and qualification.

Frequently Asked Questions

Q: Should I hire a local integrator or a national firm? Local integrators often know regional codes better and respond faster to emergencies; national firms may offer more robust support teams and technology depth. Many successful projects use a hybrid—a national partner for design and a local partner for installation and ongoing service.

Q: How long does a BAS integration typically take from kickoff to full operation? Most projects run 12–20 weeks depending on facility complexity, sensor count, and whether you're retrofitting or building new. The actual commissioning and tuning phase alone usually takes 4–6 weeks.

Q: What's the difference between a controls integrator and an HVAC contractor offering automation? A dedicated controls integrator specializes in PLCs, networking, and cross-system automation; an HVAC contractor usually handles HVAC-specific equipment and controls. For comprehensive facility automation, a controls integrator is typically better equipped to coordinate multiple building systems.

Start your integrator search today—your energy bill (and production uptime) will thank you.

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