Forced-Air Warming Compared: Bair Hugger vs Equator vs Adroit for Vet Clinics

Three Units, One Job, Different Origins

Forced-air warming is the most common way veterinary clinics actively warm anesthetized patients. The idea is the same across every brand: a blower heats room air and pushes it through a hose into a disposable blanket that spreads the warmth across the patient. Where the units differ is in their settings, their accessories, and, the part that matters most for vet clinics, whether they were ever designed with a cage or kennel in mind.

Three come up over and over: the 3M Bair Hugger Model 675, the Level 1 Equator, and the Adroit VetPro. Two of them started life in human hospitals. One was built for animals. Here is how they actually compare, including where each one leaves you improvising.

The Common Ground

Before the differences, the shared mechanics. Every one of these is a convective warmer. None of them heats the patient directly the way a water blanket or a conductive pad does. They move warm air, and that air has to land on a blanket to do its job safely and evenly. Running a bare hose at a patient concentrates the heat in one spot, which is why every manufacturer in this category builds the system around a hose-to-blanket connection rather than a loose nozzle.

Hypothermia under anesthesia is common enough that active warming is standard of care for most procedures. We covered why, and what it does to a patient, in our guide to post-operative hypothermia in veterinary patients. This piece is about the hardware.

3M Bair Hugger Model 675

This is the unit most clinics already own, usually because somebody on staff knew it from a human hospital. It offers four settings: Ambient, 32°C, 38°C, and 43°C, with the temperature measured at the hose connection to the blanket and a built-in limit that keeps hose-end air below 56°C (3M Bair Hugger Model 675 Operator’s Manual). It is reliable, parts are easy to source, and most of the veterinary world already speaks its language.

Its weakness in a vet setting is not the unit. It is everything downstream of the OR. The Bair Hugger was never designed to warm a patient inside a closed stainless steel cage, so there is no factory accessory for it. That gap is what drives the propped-door, taped-hose workarounds you see in most recovery wards. If you run a 675, a cage passthrough adapter routes the hose through a closed cage door, and a cage runs extension covers the taller floor-to-ceiling runs. Both are sized for the 675 and older Bair Hugger model series. We have not tested them on the other two units below, so we do not claim they fit those.

Level 1 Equator

The Equator, made by ICU Medical (formerly Smiths Medical), is the other human-market convective warmer you run into in veterinary practice. Operationally it works the way you would expect: the hose ridge snaps into a collar ring on the blanket, and you select a starting setting of 36°C that you can raise as needed (Level 1 Equator step-by-step guide, ICU Medical). Same convective principle, same hose-and-blanket dependency.

And the same blind spot. Like the Bair Hugger, the Equator came from human surgical suites, so warming a patient in a recovery cage is left to whatever the clinic improvises. If your practice standardized on Equators, you are solving the same cage problem with the same lack of a factory part.

Adroit VetPro

The VetPro is the odd one out, in a good way. Adroit Medical Systems built it specifically for veterinary use, and it shows in the accessory list. Alongside the usual blanket lineup (Adroit lists 18 blanket configurations), the VetPro offers an optional Kennel Connector, a Kennel Door Clamp, and connector straps, so it can warm directly into a kennel or cage without an aftermarket part (Adroit Medical, VetPro). The blower mounts on the floor, a table, or an IV pole.

That is worth saying plainly: if you are buying a brand new warming system from scratch and recovery cage warming is a priority, the VetPro already solves it in the box. We are not going to pretend otherwise to sell an adapter.

So Which One Should a Clinic Use

The honest answer depends on what you already own.

If your clinic runs Bair Huggers, which most do, the math usually favors keeping them and adding a cage adapter rather than replacing a fleet of working warming units. You get cage and run warming for the cost of a printed part, not a new machine per station.

If you are standardized on Equators, same logic. The unit is fine. The cage gap is the issue, and it is the cheaper thing to address.

If you are starting fresh, or expanding, the Adroit VetPro deserves a real look precisely because it was designed for the way vet clinics actually work, kennels and all. There is no shame in buying the tool that already fits.

What does not make sense is buying a second class of equipment to do a job your existing units can do once the cage problem is handled. Figure out what is on your shelves first, then decide.

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This article is for informational purposes only. VetBog products are accessories, not FDA-cleared medical devices, and are not affiliated with or endorsed by 3M, Solventum, ICU Medical, or Adroit Medical Systems. We have confirmed our adapters’ fit only with the 3M Bair Hugger Model 675 and older Bair Hugger model series. Brand names are trademarks of their respective owners, used here for equipment identification under nominative fair use.

Sources

• 3M Bair Hugger Model 675 Operator’s Manual (temperature settings and hose-end temperature limit). Manufacturer document
• Level 1 Equator Convective Warming System step-by-step guide, ICU Medical (hose-to-blanket collar connection, 36°C starting setting). ICU Medical Academy
• Adroit Medical Systems, VetPro forced-air patient warming (veterinary-specific design, optional Kennel Connector and Kennel Door Clamp, blanket configurations). Manufacturer page

Frequently Asked Questions

Is the Bair Hugger better than the Adroit VetPro for veterinary use?

They take different paths to the same goal. The Bair Hugger is a proven human-market unit most clinics already own, but it has no factory cage-warming accessory. The VetPro was built for veterinary work and includes an optional kennel connector. If you already own Bair Huggers, adding a cage adapter is usually cheaper than switching systems. If you are buying new, the VetPro solves cage warming out of the box.

Can I use a VetBog cage adapter on an Equator or VetPro?

We only claim a confirmed fit with the 3M Bair Hugger Model 675 and older Bair Hugger model series. We have not tested our adapters on the Equator or the VetPro, so we do not advertise compatibility with them. The VetPro also has its own kennel connector, so it does not need an aftermarket part.

Do all forced-air warmers need a blanket?

In practice, yes. Convective warmers are designed to push air into a blanket that spreads the heat across the patient. Running a bare hose concentrates heat in one area, which is why these systems are built around a hose-to-blanket connection.

What temperature setting should I use for recovery warming?

That depends on the unit and the patient, and you should follow the manufacturer’s instructions and your clinic’s protocol. As a general pattern, clinics tend to use a mid setting for routine recovery and reserve the highest setting for patients who came off the table genuinely cold.