Explosion Proof Air Conditioners for Oil & Gas

The oil and gas industry is our most common customer — and for good reason. Refineries, gas processing plants, upstream production facilities, and pipeline infrastructure are built around environments where flammable vapors are a constant operational reality. Cooling equipment in these facilities can’t just be rated for harsh conditions. It has to be rated for explosive ones.

We have installed explosion-proof cooling equipment at virtually every major oil refinery in the United States. When you call us, that’s the experience you’re tapping into.

Oil refinery interior with industrial piping and equipment

What Makes Oil & Gas Facilities Different

Most commercial and even industrial HVAC applications deal with heat, humidity, and corrosion. Oil and gas facilities add a layer that very few HVAC contractors are equipped to handle: flammable vapor environments.

Petroleum vapors — gasoline, natural gas, benzene, propane, hydrogen sulfide — are heavier than air and accumulate in low-lying areas, enclosed spaces, and equipment enclosures. A standard air conditioner motor produces sparks during normal operation. In a classified area, that spark can ignite a catastrophic explosion.

This is why the National Electrical Code classifies oil and gas facilities as hazardous locations and requires explosion-proof rated electrical equipment throughout those classified areas.

Typical Classifications at Oil & Gas Facilities

The vast majority of oil and gas facilities are classified Class 1, Division 2, Groups C and D for their outdoor process areas, pump rooms, and equipment enclosures. This means:

  • Class 1 — flammable gases or vapors may be present
  • Division 2 — the hazard exists under abnormal conditions (equipment failure, accidental release) rather than continuously
  • Groups C & D — the specific vapors present are ethylene-range (Group C) and petroleum/natural gas-range (Group D) materials

Some interior spaces — particularly around open sumps, certain pump rooms, or areas with known continuous releases — may be classified Division 1, requiring more extensive explosion-proof specifications.

Common classified areas at oil and gas facilities include:

  • Process unit perimeters
  • Pump and compressor buildings
  • Separator areas
  • Tank farms and loading racks
  • Pipeline pigging stations
  • Gas meter and regulator rooms
  • Wellhead and production equipment enclosures

What We Provide

We modify air conditioning units — most commonly Bard wall-mount units — to meet Class 1, Division 2, Group C&D specifications for oil and gas service. Our modifications include:

  • Explosion-proof motors throughout (compressor, condenser fan, evaporator fan)
  • Rigid metallic conduit with sealed fittings at all entries
  • Explosion-proof electrical enclosures
  • Coated coils for corrosive or H₂S-containing environments
  • Full documentation package for compliance records

We can modify any brand of air conditioner to your spec — Bard, Trane, Carrier, Lennox, Mitsubishi, or any other manufacturer. If your facility has a preferred unit or an existing piece of equipment that needs to be brought into compliance, we can retrofit it to meet your hazardous location classification. We’re brand-agnostic because we’re an independent modifier, not a manufacturer pushing proprietary equipment.

Common Applications

Control room cooling — Distributed control system (DCS) rooms, programmable logic controller (PLC) enclosures, and operator control buildings adjacent to classified areas require explosion-proof cooling on the classified-area side.

Equipment shelter cooling — Modular equipment shelters, blast-resistant modules (BRMs), and portable skid units need cooling that meets the classification of their installation area.

Electrical building cooling — Motor control centers (MCCs) and switchgear buildings in or adjacent to classified areas.

Analyzer shelter cooling — Gas chromatographs and process analyzers require stable temperature environments. Cooling equipment serving analyzer shelters in classified areas must be explosion-proof rated.

Wellhead and production equipment — Upstream production facilities, whether onshore or offshore, often have enclosed instrumentation and control spaces that require classified cooling equipment.

Pipeline stations — Compressor stations, metering stations, and pump stations frequently include classified areas around compression equipment and vapor-handling systems.

Corrosion and Coastal Considerations

Refineries near the Gulf Coast, offshore platforms, and sour gas environments (H₂S-containing) present additional equipment challenges beyond hazardous location classification. Standard coil coatings provide some protection, but for the most demanding corrosive environments we offer Sherwin-Williams Phenicon HS coating — an industrial-grade epoxy novolac phenolic applied to the entire unit, not just the coils. Phenicon is rated for full brine immersion and crude oil service, far exceeding any standard HVAC coating.

For installations in moderately corrosive environments, we also offer standard coated coils using Aqua-Aero or similar protective coatings.

We recommend enhanced corrosion protection for any installation in:

  • Marine or offshore environments (salt spray, brine exposure)
  • Sour gas service (H₂S, sulfur compounds)
  • Coastal refineries (within 5 miles of salt water)
  • High-humidity tropical climates

See our Phenicon coating page for full details on the most corrosion resistant HVAC coating available.

Pricing and Quotes

Class 1, Division 2, Group C&D — inside unit only: Starting at $6,700, up to $7,600 for 3-ton units

Class 1, Division 2, Group C&D — full inside + outside: Starting at $9,000 (8,000 BTU) to approximately $10,000 (3 ton)

Larger units, Division 1, and custom fabrication are quoted individually.

Call (844) 925-5668 — quotes in 24–48 hours.

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(844) 925-5668

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