Vetting a commercial HVAC contractor in Michigan means checking mechanical licensure, EPA 608 Universal certification, CSD-1 boiler experience, and calling at least three references who operate the same type of facility you run. Samco Facilities Maintenance publishes this checklist because most proposals look identical on paper and the differences that matter only appear when you dig. Call (734) 838-6300 to talk through our credentials before you even schedule a site walk.
Why Most Commercial HVAC Proposals Look the Same on Paper
A facility manager in Dearborn sends an RFP to five contractors. Three weeks later, five proposals come back on similar templates, with similar language, at prices that vary by 40 percent. None of them clearly states what their technicians are certified to do. Two do not list insurance limits. One references “full-service HVAC solutions” without naming a single piece of equipment by model class.
This is the standard. It is not an accident. Contractors who win on price have learned that vague proposals make comparisons harder and give more room for change orders. Contractors who win on relationships have learned that a familiar face reduces scrutiny. The facility managers who get burned are the ones who treat the proposal as the vetting process instead of the starting point.
Across Wayne, Oakland, Macomb, and Washtenaw counties, a few strong commercial HVAC contractors operate alongside a large number of residential shops carrying residential certifications doing commercial work. The paperwork looks identical until something breaks and the tech on site cannot diagnose a chiller or a BAS fault. Asking the right questions before you sign is faster and cheaper than learning the hard way.
Ten Vetting Questions Most Facility Managers Skip
Here is what we actually see. Eight out of ten contractors that bid Michigan commercial accounts cannot answer all ten of these questions on the spot. That is not a coincidence. It is a signal about what their team can and cannot do once they are on your roof.
Run every bidder through this list before you compare price:
- What is your Michigan mechanical contractor license number? Verify it with LARA directly. A licensed firm knows the number from memory.
- How many field technicians carry EPA 608 Universal certification? Universal, not Type I or Type II. If fewer than two thirds of their techs carry it, ask who responds after hours.
- Do your technicians carry NATE certification? Not a legal requirement, but a meaningful benchmark. It separates contractors who invest in training from those who do not.
- What is your CSD-1 boiler testing experience? Michigan requires annual CSD-1 inspection on commercial boilers. If they cannot name the test and who runs it, they are the wrong contractor for any building with a boiler.
- Can you provide three references from facilities similar to mine? A warehouse reference tells a hospital nothing. Demand relevant comparisons.
- What is your guaranteed response time for priority failures, in writing? “We are very responsive” is not a number. Get a signed SLA with emergency, same-day, and next-business-day tiers.
- What are your after-hours and holiday labor rates? These should be in the contract, not covered by “standard rates apply.”
- How do you handle parts sourcing for older equipment? Many Southeast Michigan buildings run equipment from 1998 to 2008. A contractor without parts network depth will strand you on a Thursday night.
- What BAS platforms have your technicians worked on? Honeywell Spyder, Johnson Controls Metasys, and Siemens Desigo are common in Oakland and Macomb county buildings. If they cannot name platforms, they are not a BAS-integrated PM contractor.
- What does your written PM report look like? Ask to see a sample. “Unit checked, all OK” is not a report. A real PM report names every test point, every filter rating, and every fault code cleared.
The Michigan Angle: Licensing, CSD-1, and EPA 608 Credentials
Michigan has specific commercial contractor requirements that out-of-state benchmarks never cover. Any contractor servicing commercial buildings in Wayne, Oakland, Macomb, or Washtenaw counties needs a valid Michigan mechanical contractor license. You can check that license at the LARA online lookup in about two minutes. Do it.
EPA 608 Universal covers refrigerant handling on your rooftop units and chillers. It is mandatory. A contractor who sends a Type II tech to a commercial chiller job is cutting corners or does not know the difference.
CSD-1 is where most contractors fall short. The Michigan Mechanical Code requires annual CSD-1 testing on commercial boilers. Most light commercial shops cannot run it. Ask directly. A blank stare is your answer.
The January 2019 Polar Vortex exposed the contractors who had real Michigan experience. Buildings in Livonia and Sterling Heights lost boilers and froze coils because their PM contractor had not set freeze stats correctly for minus 20 degree conditions. That is an experience question, not a price question.
Red Flags That Mean Walk Away
Some signals do not need a follow-up question. They need a polite goodbye:
- PM pricing uses a percentage of equipment value. That model incentivizes overvaluing your equipment. Flat line item pricing is the only honest format.
- They cannot name the certifications their techs carry. If the office does not know, the field does not have them.
- “Parts included” without a dollar cap or exclusion list. That phrase is legally meaningless. It will be contested when a compressor fails.
- Sales rep at every meeting, techs never present. Ask to meet the technician who will run your account before signing.
- No references from Michigan facilities similar to yours. Southeast Michigan facilities run conditions that Sunbelt experience does not prepare a contractor for.
- SLA covers business hours only. Equipment in Detroit, Warren, and Ann Arbor does not limit failures to Monday through Friday.
- No BBB record or unresolved complaints. Samco Facilities Maintenance holds a BBB A+ rating. That is a floor, not a crown.
How Samco Welcomes Vetting
Samco Facilities Maintenance has serviced commercial and industrial facilities across Southeast Michigan since 1997. Our technicians are EPA 608 Universal certified and NATE certified. We hold a BBB A+ rating and we will give you our Michigan mechanical contractor license number in the first conversation. We carry full CSD-1 boiler inspection capability and we have run it for food producers, manufacturers, and property managers in Livonia, Dearborn, Troy, and across Washtenaw County.
A Dearborn manufacturer we have serviced since 2005 runs us through a full credential review every three years at contract renewal. They ask for certificate copies, three references, and a sample PM report. We provide all three within 24 hours. That is what a real commercial HVAC contractor looks like when a facility manager asks the right questions.
Call (734) 838-6300 and ask us the ten questions above. We will answer every one. Learn more about our preventive maintenance program, review our credentials and history, and visit our commercial HVAC service page.
Frequently Asked Questions
What credentials should a commercial HVAC contractor carry in Michigan?
A Michigan commercial HVAC contractor needs a valid Michigan mechanical contractor license, EPA 608 Universal certification for refrigerant work, and CSD-1 boiler testing capability if your building has a commercial boiler. NATE certification is not legally required but is a reliable competency benchmark for commercial equipment. Verify the mechanical license directly with LARA before signing any contract.
How do I check references on a commercial HVAC contractor?
Call the reference directly and ask three questions: did the contractor show up on time for PM visits, how did they handle the last emergency call, and would you renew the contract. Demand references from facilities similar to yours in equipment type and square footage. A warehouse reference tells a food manufacturer nothing about how the contractor handles refrigeration compliance or dust collection balance.
What response time is reasonable for a commercial HVAC contractor?
Emergency response in Michigan should be four hours or less around the clock, including weekends. Same-day response covers failures that are serious but not life-safety immediate. Next-business-day is appropriate for non-critical requests. All three tiers should be written into the signed contract with a penalty or escalation clause, not listed verbally.
Should a PM contract spell out parts coverage?
Yes, with a dollar cap or a specific exclusion list, not the phrase “minor parts included.” Any contract that uses that phrase without defining it is a dispute waiting to happen after the first compressor, motor, or actuator fails. Ask the contractor to define exactly what parts are included, what the per-incident cap is, and what the billing process is for anything above the cap.
Ready to Run a Real Vetting Process?
If you are ready to put a Michigan commercial HVAC contractor through a real checklist, start with Samco Facilities Maintenance. We serve manufacturers, property managers, food producers, and healthcare facilities across Southeast Michigan from our Livonia, MI headquarters. We have answered these questions for facility teams in Wayne County, Oakland County, Macomb County, and Washtenaw County since 1997. Call (734) 838-6300 or visit our contact page to schedule a site walk. You can also review our full service lineup to confirm we cover everything your facility needs before we ever talk price.