I thought I was saving money. I was wrong.
When I took over purchasing for our company in 2020, I thought I had it figured out. My mandate was simple: reduce vendor costs. For a 400-person company across three locations, that meant a lot of orders—roughly $80,000 annually across 8 different vendors for everything from office supplies to building maintenance.
One of the bigger line items? HVAC maintenance. Specifically, our McQuay fan coil units (FCUs). We have about 40 of them spread across our buildings. They're workhorses, but they're not invincible.
I'll cut to the chase. I made a mistake. A $4,200 mistake (not that I tracked it carefully—more on that later).
The Surface Problem: A Broken FCU
Last fall, one of our McQuay fan coil units in the east wing office started making a noise. You know the one—that rhythmic clicking that slowly drives everyone crazy. Maintenance flagged it. I got the call.
"We need a service call. The fan motor bearing is shot."
— Our building maintenance lead
Standard stuff, right? I got three quotes:
- Vendor A (local HVAC shop): $850 for the repair. Couldn't promise OEM parts.
- Vendor B (regional McQuay service provider): $1,400 for the repair. OEM parts, certified tech, but a 2-week lead time for the motor.
- Vendor C (national chain): $1,100. OEM parts, but tech had to drive from a city 3 hours away.
The obvious choice seemed to be Vendor A. $850. Done. I saved $550 over the next cheapest option. Felt good.
It didn't feel good two weeks later.
The Deep Cause: What I Missed
Most buyers focus on the service quote itself—parts, labor, travel. I did. But the question everyone asks is "what's your best price?" The question they should ask is "what's included in that price?"
Here's what the $850 from Vendor A didn't include:
- OEM part sourcing: They used a third-party aftermarket motor (i.e., not the McQuay-specified part).
- Proper calibration: The replacement motor wasn't matched to the unit's specifications. The FCU ran, but it ran louder and less efficiently.
- A warranty on the repair: Standard 30 days. That's it.
I'm not an HVAC engineer (I'm an administrator), so I can't speak to the technical specifics of fan motor torque curves. What I can tell you from a management perspective is that the new motor failed. Again. Six weeks later.
"I wish I had tracked this more carefully. What I can say anecdotally is that the aftermarket motor didn't last. The original McQuay motor in the unit had been running for 9 years."
— My internal post-mortem
The second repair? Vendor B. $1,400. OEM McQuay motor. Proper installation per the McQuay fan coil unit manual (which I should have read the first time). It's been running smoothly for 8 months now (as of June 2025).
The Real Cost: More Than Parts and Labor
Let me break down the total cost of my decision.
| Cost Category | Vendor A (The "Cheaper" Choice) | Vendor B (The "Expensive" Choice) |
|---|---|---|
| Initial Service | $850 | $1,400 |
| Second Service (6 weeks later) | $1,400 (Vendor B) | $0 |
| Employee Disruption (East Wing lost cooling for 5 days total) | ~$2,100 (hard to quantify, but we had complaints) | $0 |
| Reputation Cost (with internal clients) | High. My VP asked why we were paying for the same job twice. | None. Smooth, quiet repair. |
| Total Real Cost | ~$4,350 | $1,400 |
The 'budget vendor' choice looked smart until the motor failed again. Net loss: about $2,950 (and a lot of internal credibility).
This is what I now call the total cost of ownership (TCO) framework. It's not a new idea—it's been standard in industrial procurement for years. But for someone like me managing commercial building maintenance on a budget, it was a blind spot.
The Solution (Brief and Practical)
So, how do you avoid my mistake? Here's what I changed:
1. Stop Asking for "Quotes." Ask for "Total Cost Breakdown."
When I call a vendor now (like our local McQuay service provider), I give them a checklist:
- Are parts OEM or aftermarket?
- What warranty comes with the repair? (I now require 12 months minimum)
- What's the travel and diagnostic fee?
- What does the McQuay fan coil unit manual specify for this repair? (Don't skip this—OEM specs matter for TCO.)
2. Use the Manual.
I know, it sounds obvious. But the McQuay FCU manuals have specific torque specs, filter sizes, and start-up procedures. If your vendor ignores them, you're setting yourself up for a shorter equipment lifespan.
3. Build a Relationship, Not Just a Transaction.
I now have a standing service agreement with our regional McQuay parts and support provider. It costs $200/month. It gives me priority scheduling, discounted rates on emergency calls, and a dedicated account manager. I saved $2,400 in rush reorder fees last year alone. (Not that I have the hard data to prove it—let's say I have strong anecdotal evidence from my spreadsheet.)
Is it worth it? Absolutely.
I realize this might seem like a lot of fuss over one fan coil unit. But for a building manager or an admin like me, the principle scales. Whether you're buying a heat pump dryer for a small office or a patio heater for an outdoor break area, the TCO question is the same.
"The question isn't 'what's the cheapest part?' It's 'what's the cheapest year?'"
— A retired procurement manager I respect
That's why I now calculate TCO before comparing any vendor quote. It's not the sexiest skill, but it's saved me from repeating my $4,200 lesson.
If you're managing a few McQuay units, I'd suggest finding your McQuay fan coil unit manual, checking the part specs, and calling a certified service provider. Your building—and your budget—will thank you. (Done.)
