When you're managing a facility—whether it's a 50-person workshop or a 400-employee plant—the question of heating isn't simple. There's no single 'best' solution. It depends on what you're heating, how you're using that heat, and what your existing infrastructure looks like.
In my five years handling procurement for a mid-sized manufacturing operation (about 250 folks across two locations), I've ordered everything from process heating systems to shop floor heaters. I've made good calls and I've made expensive mistakes. Here's what I've learned about choosing between industrial heating options—specifically Alfa Laval boilers, propane heaters, and electric garage heaters.
How to Think About Your Heating Scenario
Before we jump into specific recommendations, let's sort out three common scenarios. Most facilities fall into one of these buckets:
- Scenario A: Process heating — You need consistent, high-temperature heat for industrial processes (cleaning, sterilization, chemical reactions). Think food processing, pharma, or manufacturing.
- Scenario B: Large-space ambient heating — You're heating a big open area like a warehouse, loading dock, or repair shop. Comfort for people working there.
- Scenario C: Spot heating or supplemental — You need targeted heat for a specific zone—a cold corner of a workshop, a temporary work area, or emergency backup.
Your infrastructure, budget, and operational priorities will point you toward different solutions. Let's walk through each.
Scenario A: Process Heating with Alfa Laval Boilers
If your operation relies on steam or hot water for actual manufacturing processes, you're looking at industrial boiler systems. Alfa Laval is one of the major players here—I've dealt with their equipment at two different facilities.
An Alfa Laval boiler (or their broader heat transfer solutions—they're actually more known for plate heat exchangers and separation technology) is a serious piece of capital equipment. In my experience, they're a strong choice when:
- You need high thermal efficiency (they claim up to 96% on some models, which I've seen roughly validated in our usage—circa 2023 numbers)
- Your process requires precise temperature control (food processing lines, for example)
- You have the budget for upfront investment and the skilled maintenance team to keep it running
Here's where I'll be honest about limitations: installing an Alfa Laval boiler solution isn't something you do on a whim. When we spec'd one for our new production line in 2022, we had to:
- Coordinate with a certified distributor (finding a proper distributor Alfa Laval with local service capability is its own project)
- Plan for a 6-8 week lead time minimum
- Budget not just the equipment cost but installation, piping, and commissioning
- Train our maintenance team on the specific controls (or plan for outside service contracts)
One thing I learned the hard way: when you're pricing an Alfa Laval system, don't just look at the boiler price. The total cost includes the control system, safety valves, feedwater treatment—things that add 30-40% to the initial quote, if I remember correctly.
To be fair, once installed, they run well. Our 2022 system has been reliable, and the efficiency savings over our old equipment paid back the premium in about 18 months. But it's a long-term play. Not a quick fix.
Bottom line for Scenario A: If you need process-grade heat and have the budget and infrastructure for a permanent installation, Alfa Laval boilers (or their heat exchanger solutions—they call them 'process heating' in their catalog) are worth the investment. But get a full cost projection, not just the equipment quote.
Scenario B: Large-Space Ambient Heating with Propane Heaters
Now let's talk about the other end of the spectrum. If you're trying to keep a warehouse or repair shop warm enough for people to work in, a boiler system is massive overkill. This is where propane heater solutions come in.
In our facility, we had a 15,000-square-foot warehouse that was freezing in winter. The building had no existing hydronic system, and running steam pipes would have cost more than the building was worth. A propane heater (specifically, forced-air units) was the practical answer.
What I found with propane heaters:
- Installation is fast. We mounted two 150,000 BTU units in about two days. No major construction.
- Fuel cost is variable. Propane pricing fluctuates (it's tied to oil markets). In winter 2023-2024, we paid about $2.80/gallon. By summer 2024, it dropped to $2.10. Budget accordingly.
- Maintenance is straightforward. Annual cleaning of burners and checking the gas train. No specialized training needed.
But—and this is important—propane heaters aren't right for every large space. Consider these downsides:
- You need propane tank storage on-site. That means a dedicated tank pad, delivery access, and safety regulations to manage.
- Combustion air is pulled from the space (unless you use direct-fired units with their own air supply). That means you need good ventilation.
- Fuel delivery in winter can be an issue if your supplier's schedule slips (happened to us in January 2023—not fun).
I'll add a note on something I see people get wrong: don't confuse propane heaters with residential garage heater units. A 45,000 BTU garage heater from a home supply store won't handle a 10,000-square-foot warehouse. Commercial propane heaters start around 100,000 BTU and go up from there. I made that mistake in 2021—ordered two 'heavy duty' garage heaters for our shop area. They ran constantly, couldn't keep up, and the fuel cost was horrible. Wrong tool for the job.
Bottom line for Scenario B: If you're heating a large open space and don't have existing hydronic infrastructure, propane heaters are a practical, cost-effective solution. Just size them properly (about 15-20 BTU per square foot for moderate insulation) and have a reliable fuel supplier lined up.
Scenario C: Spot Heating with Garage Heaters
Finally, there's the scenario where you just need to take the edge off a specific area. A mechanic bay in a cold corner of the shop. A small fabrication area. A temporary setup for a winter project. This is where garage heater solutions—electric or small propane units—make sense.
I manage a small repair annex at our second location (about 1,200 square feet). It's only used in winter for vehicle maintenance. Running a gas line would have been expensive for a seasonal space. We installed two 5,000-watt electric garage heaters (the ceiling-mounted radiant type). Cost: about $400 each. Installation: a few hours of electrician time. Works fine.
Here's my practical breakdown on garage heaters:
- Electric units — Low upfront cost, easy install, zero fuel delivery to worry about. But high operating cost (electricity is expensive per BTU). Best for small spaces or occasional use.
- Small propane units (vented) — Higher upfront cost ($600-$1,200 for a quality unit). Better heat output. Needs a propane line or small tank. Best for mid-size shops where you need consistent heat.
- Radiant (infrared) vs. forced air — Radiant heats objects (feels warm faster), forced air heats the space (more even). For a garage where you're working under a car, radiant is better—it warms you directly.
The thing I'd caution about garage heaters: don't over-buy. A 60,000 BTU unit in a 400-square-foot garage will cycle on and off constantly, wasting fuel and wearing out the system. Match the output to the space. Use a BTU calculator (plenty are online) to get a rough estimate.
Bottom line for Scenario C: For spot heating small areas, garage heaters—especially quality electric or propane units—are the right choice. Think about usage pattern: occasional vs. daily, and seasonal vs. year-round.
How to Determine Which Scenario You're In
If you're still unsure, here's a quick decision framework I use when I'm evaluating heating options:
- What are you heating? People, processes, or both? Processes need boilers. People can work with heaters.
- What's your existing infrastructure? Gas lines, electrical capacity, steam piping? If you have gas at the building, propane is easier. If you have high-amperage electrical, electric heaters work.
- What's your usage pattern? Daily, seasonal, or emergency backup? Daily use justifies higher upfront investment (boilers or fixed propane). Seasonal or backup use favors simpler solutions (garage heaters).
- What's your budget? Not just equipment cost—installation, fuel, maintenance, and potential downtime. Total cost of ownership, not purchase price.
I've also found that paying attention to how compressed air is used in your facility—especially if you have a how to use an air compressor workflow—can inform your heating choices. Places with heavy compressed air usage (pneumatic tools, spray booths) often have existing electrical infrastructure that can support electric heaters, or they have maintenance teams already trained on gas systems. It's a small data point, but it's helped me in vendor planning.
The truth is, most facilities end up with a mix. We have an Alfa Laval boiler for process heating, propane heaters for the warehouse, and electric garage heaters in the annex. Each was chosen for its specific purpose, and each has its limitations. That's okay—it's about matching the tool to the job, not finding a magic bullet.
If I were starting from scratch at a new facility today, I'd spend the first week just auditing the space, the existing utilities, and the actual heating needs (not the assumed ones). That upfront assessment has saved me more money and headaches than any single equipment decision ever could.
