Why I Stopped Buying Air Filters by Price Alone (and What Alfa Laval Heat Exchangers Taught Me About Quality)

Let me start with a confession that won’t impress anyone: I once spent a Friday afternoon watching “how to clean frigidaire ice maker” videos and scrubbing the breakroom ice machine with a plastic brush while the plant controller walked past twice. Not glamorous. But when you’re the office administrator who buys everything from printer toner to facility maintenance supplies, that’s the job.

I oversee purchasing for a mid-sized industrial manufacturer—around 300 employees across two buildings, with an office wing attached to the plant floor. When I took over in 2020, I processed 60 to 80 orders a year and reported to both operations and finance. I’m not the person who selects Alfa Laval heat exchangers; that’s engineering territory. I’m the person who processes those capital orders, orders the spare parts, and buys whatever keeps the building comfortable. And that’s exactly how I learned that small, low-status purchases can create high-stakes impressions.

Nobody Notices the Quiet Climate Stuff—Until They Do

For most of my first year, I treated the facility’s “quiet climate stuff” as a string of unrelated annoyances. There was the 16x20x1 air filter I reordered whenever the office started smelling like warm dust. There were the radiator covers in the meeting-room wing, faded and dented, that my predecessor planned to replace “sometime.” And there was the Frigidaire ice maker in the breakroom that made ice that tasted faintly of the freezer.

Three different items. Three different vendors. Three different problems that kept coming back.

It never occurred to me to ask why they kept coming back. I just bought the next thing and moved on.

The turning point came one afternoon when a sales director brought an important prospect through the office. Nobody mentioned the radiator covers or the ice maker. But afterward, the sales director said the meeting room felt “heavy” and asked if the HVAC needed attention. I checked the maintenance log. The air filter was overdue for a change. Not an emergency—but the moment stuck with me. The visitor didn’t remember our pitch. They remembered the room.

The Real Problem Wasn’t Budget. It Was Ownership.

If you had asked me then why small things kept failing, I would have said budget. Looking back, that wasn’t the real issue. The real issue was that nobody owned the comfort experience of the building as a whole.

The maintenance tech ordered filters. I ordered office fixtures. The cleaning crew had its own list. Each of us optimized our own corner. A 16x20x1 air filter was just a size to me—I checked the dimensions but not the efficiency rating. The radiator covers were “cosmetic,” so the dented ones stayed. The ice machine got cleaned when someone complained. That is reactive purchasing, with no feedback loop.

Meanwhile, the plant side was buying entirely differently.

When operations replaced an aging cooling loop, the capital request referenced an Alfa Laval air cooled heat exchanger. I remember reading that request and thinking, I don’t know anything about this equipment. But the engineers did. They specified duty conditions, expected ambient temperatures, materials, and maintenance access. They asked for performance data and support commitments before anyone discussed price. That process took weeks, not one afternoon.

That contrast changed how I think about purchasing. For expensive equipment, this company insists on discipline: specify, validate, review. But for the climate items people touch and feel every day, we were buying by size and price—then acting surprised when the result felt cheap.

What That Inattention Actually Cost Us

Let’s make this concrete. In 2024, between January and September, we logged 41 facility-related complaints. Twenty-six of them fit under what I now call the thermal comfort chain: stuffy rooms, odd smells, a noisy ice maker, rooms that ran too warm or too cold. None required an expensive repair. They were small failures that kept repeating because nobody had assigned ownership or written down a standard.

The ice machine was the most embarrassing one. Before a visit from a prospective client, I finally sat down and learned how to clean frigidaire ice maker properly: unplug it, empty the bin, wipe down the interior, and run a cleaning cycle with fresh water afterward. It should have been on the calendar months earlier. I’d known that—but I thought, what are the odds anyone will notice? One off-tasting ice cube in a guest’s water was enough to answer the question. Health authorities would not have been impressed either; in food safety terms, ice is food.

The air filter was a quieter version of the same mistake. For years I bought whatever 16x20x1 air filter was cheapest and fit the slot. It fit—that was its only qualification. Filter performance is rated under ASHRAE Standard 52.2, and the filters we used were doing very little beyond stopping large dust. When the HVAC contractor showed me the coil and the pressure-drop readings, the cause of the “heavy” meeting rooms became obvious. We were paying the lowest possible price, replacing filters more often than necessary, and losing comfort and efficiency all year.

And the radiator covers? I called them cosmetic for three years. They sat in the wing where we bring visitors, with rust spots and bent edges that said, “nobody here is in charge of this building.” They were also old enough to be a safety concern around a hot radiator. Replacing them took a few weeks and a couple hundred dollars. I simply hadn’t connected that purchase to how clients judge quality, because it felt too small to matter.

None of this ever showed up on a P&L as a dramatic line item. That’s the trap. Low-status purchases don’t fail loudly. They fail as a vague impression: that place felt a little off. And a vague impression is almost impossible to trace back to one order.

What I’d Do Differently

I can’t tell you that one premium product saved us. The change was structural.

  1. Give one person ownership of the whole climate experience. It doesn’t have to be an engineer. It has to be someone who walks through the building and says, this is mine to fix. In our case, that person turned out to be me.
  2. Walk the visitor’s route in different seasons. Sit in the meeting room. Put your hand near the radiator. Pour a glass of water from the breakroom ice maker. What visitors touch and breathe carries more weight than what they see.
  3. Buy to a standard, not just to a size. A 16x20x1 air filter is a dimension. We now choose a MERV rating that fits occupied office space and change filters on a schedule. Radiator covers have to allow airflow and fit safely—not just hide a worn radiator behind something pretty.
  4. Give small purchases the same respect that engineering gives big ones. When the plant specified Alfa Laval heat exchangers, it was because of reliability, performance data, and service planning. Good purchasing is the same discipline at any dollar amount. The paperwork changes, the thinking shouldn’t.

During our vendor consolidation in the fall of 2024, I started asking suppliers for more than a price: delivery reliability, return policies, technical support, clear invoicing. We cut the number of facility vendors significantly and gave the stronger ones more volume. It wasn’t a dramatic cost saving—but comfort-related complaints dropped to a handful, and I’ve stopped getting calls about the ice machine at 4:30 on a Friday.

Here’s the thing I wish I had understood in 2020: quality is what customers perceive, not what you intend. A visitor forms an opinion from the air, the temperature, the water, and a dozen small physical details before your first slide appears. If you manage only the visible purchases, you’re hoping the invisible ones get lucky.

This is based on one person’s experience at a 300-person industrial company, between 2020 and late 2024. If you run a small office or a much larger facility, the details will differ; the principle shouldn’t. Standards and product lines evolve, so verify current filter ratings and equipment guidelines before you place your next order.

You don’t need to be an engineer to stop buying on autopilot. You just need to remember that every order—even the boring ones—says something about your company.

author avatar

Elisa Nordberg

Elisa Nordberg writes about air-cooled and water-cooled industrial chillers, modular glycol systems, and screw, scroll, and centrifugal configurations for process and comfort cooling. Her evaluations reference ISO 5149 and AHRI 550/590 practices while comparing cooling capacity, COP, IPLV, compressor lift, fluid flow, and evaporator approach temperature. She helps plant engineers and sourcing teams size dependable chiller packages, interpret part-load performance, and balance energy use, redundancy, maintenance access, and lifecycle cost.

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