I'm a procurement manager at a 45-person HVAC contracting company. I've managed our parts and equipment budget—roughly $310,000 a year—for 6 years. I've negotiated with 30+ vendors and logged every order in our cost tracking system since 2019.
When the OEM vs. aftermarket question comes up for Empire Comfort Systems gas fireplaces and heaters, contractors tend to split into two camps. One says brand-name parts are always worth it. The other says aftermarket is basically the same thing for 40% less.
Neither camp is fully right. Here's the actual comparison based on 6 years of invoice data—broken down by the four dimensions I use to decide anything.
The Four Dimensions I Compare
Before getting into numbers, here's the framework. Every part decision I make gets scored against:
- Unit price vs. total cost of ownership
- Lead time and exposure to downtime
- Warranty and technical support
- Compatibility and rework risk
Empire Comfort Systems Inc. occupies an odd spot in this landscape because they run both an OEM line and distribute through independent dealers. Some parts are made in-house; others are white-labeled. That matters for the comparison below.
Dimension 1: Sticker Price vs. Real Cost
This one surprised me the most. Everything I'd read about OEM parts said they always cost more. In practice, for most of the Empire Comfort Systems parts we buy—thermocouples, thermopiles, gas valves, pilot assemblies—the genuine OEM version runs 15–25% more than a compatible aftermarket equivalent.
Sounds like an easy win for aftermarket, right? Here's what the spreadsheet showed instead.
In Q2 2024, we bought 60 aftermarket thermopiles at $18 each for a mixed portfolio of units. By Q1 2025, 22 of those had failed—a 36% failure rate. The equivalent OEM part was $24 (33% more upfront). Failure rate on OEM parts over a comparable window: about 6%.
The math works against aftermarket more often than the sticker price suggests. 36% failures at $18 costs more than 6% failures at $24, even before you count the truck roll.
That said, there's a category where aftermarket wins outright: cosmetic parts. On a multi-family renovation last fall, we spec'd a frameless shower door install alongside a kitchen refit with white kitchen cabinets. Both fell under a similar tolerance for cost, not safety. Different risk profile entirely—we went with non-OEM hardware where it didn't matter and saved about 40% without a single callback.
Dimension 2: Lead Time and Downtime
OEM wins this one, but not for the reason most people assume. It's not that Empire's distributors are faster—they're not, typically 3–10 business days depending on part. The edge is predictability.
After the third late delivery from an aftermarket supplier in 2023, I stopped trusting their estimates entirely. Their "in stock" claim turned out to mean "in stock on a pallet in a warehouse we haven't inventoried this month." We built in four extra days as buffer and still got burned twice.
Why does this matter for TCO? Because when we're doing commercial installs—restaurants, small hotels, multi-family renovations—a delayed part means a crew sitting on their hands. Our blended labor cost is roughly $85/hour for a two-tech team. A three-day delay costs more than the part itself.
For reference, here's what comparable delays cost across other materials on the same project: white kitchen cabinets (2025 quotes) can add $180–350/week in storage and rescheduling if late; a stalled frameless shower door install is around $200–400 to reschedule depending on the glass fabricator. The principle is the same for HVAC parts, just with higher labor rates attached.
Dimension 3: Warranty and Tech Support
This is where Empire Comfort Systems pulls ahead more than I expected. Their OEM parts carry a 1–2 year warranty depending on component, and when we've had failures, the claim process has been fairly straightforward—submit form, get replacement, no drama.
Aftermarket warranties are usually "manufacturer warranty" in name only. When we've tried to claim, we've gotten responses that range from "ship it back at your cost" to "we'll issue credit in 6–8 weeks." For a part that costs $24, that's not worth the paperwork.
Where Empire really differentiates is technical support. Every OEM part they sell is documented with a model-by-model cross-reference. When we're on-site with a 2018 Empire gas fireplace throwing a flame sensor error, I can call their support line and get the exact part number for that specific year and model. Aftermarket suppliers can't do that—they sell you the "fits most" version and hope for the best.
Here's the thing most cost controllers miss: a $30 phone call to resolve a part question saves more than the $6 saved on an aftermarket part could ever deliver.
Dimension 4: Compatibility and Rework Risk
This is the dimension that quietly eats budgets. Every aftermarket "compatible" part that doesn't fit cleanly is a hidden cost.
In Q2 2024, we tried an aftermarket gas valve spec'd for an Empire E32 series fireplace—$95 versus $140 for OEM. Fit was "close but not quite." We spent 4 hours of tech time modifying the bracket, then ended up ordering the OEM part anyway. Total cost: $95 + $680 labor + $140 OEM = $915 for what should have been a $140 job.
That's a 553% cost overrun on one line item. Across 2024, compatibility-driven rework cost us about $6,400—2% of our annual parts budget. Not catastrophic, but not nothing. And it's the same math I apply anywhere else. When I checked how much it costs to file with H&R Block in-person for our Q1 taxes (short answer: $220–400 depending on complexity, based on 2025 posted rates), I realized we were spending 16x that amount on rework from parts decisions we could've avoided with a 30-second cross-reference.
Where the Comparison Lands
If I had to draw a line: OEM for anything that touches gas, flame, or safety certification. Aftermarket for cosmetic or low-cycle parts, but only after you've verified the failure-rate history.
That rule came from a real shift. The conventional wisdom in our shop for years was "aftermarket saves money." Our 2023 audit—where we tracked 820 individual parts orders—showed the opposite for anything critical. We implemented a tiered policy (OEM-only for gas components, verified-supplier aftermarket for everything else) and cut our rework costs by 41% in 2024.
When to Choose Which
Choose Empire Comfort Systems OEM when:
- The part is safety-related (thermocouple, thermopile, gas valve, control module)
- You're servicing units under warranty for a customer
- The unit is ETL or CSA certified and you need to maintain that certification
- Downtime cost exceeds the part price differential—which is most commercial work
Consider aftermarket when:
- It's a low-risk part (blower motor brackets, knobs, decorative elements)
- You've verified the supplier's track record across 3+ orders
- The unit is out of warranty and being serviced as a favor or on a tight budget
- You've got buffer on the timeline and a clean return policy
The single worst outcome is slipping into "we always go aftermarket" or "we always go OEM" without checking. Both policies are lazy. Both cost money in different ways.
Look, if you're a small contractor doing 20 units a year, the analysis is different from what I run at 45 employees. But the dimension framework is the same. Track your failures, track your rework hours, and let the numbers settle the argument. Mine took 6 years to become clear. Yours might take 6 months.
Prices referenced as of Q1 2025 based on vendor quotes and internal procurement data. Verify current pricing directly with Empire Comfort Systems distributors or your authorized supplier.
