Hydrocollator Heating Units

A hydrocollator is the stationary heating unit at the center of moist heat therapy — a stainless steel tank that keeps water at a controlled temperature so hot packs stay ready for treatment throughout the clinic day. Physical therapy departments, chiropractic offices, athletic training rooms, and rehabilitation facilities depend on these units to deliver consistent, penetrating moist heat that helps relax muscles, ease stiffness, and prepare tissue before manual therapy or exercise.

The DJO Hydrocollator E-1 Therapy Pack Heating Unit is a compact standard-size tank measuring 8 x 13 x 16 inches, shipping with four standard HotPacs so it's ready to use on arrival. Its size suits smaller treatment areas, single-therapist practices, and satellite rooms where a full mobile unit would be overkill but reliable moist heat is still essential.

Buyers usually ask three things. First, how hot does it run? Hydrocollator units hold water around 160–166°F, hot enough to charge packs fully while the silicate gel inside them releases heat gradually and safely against the body when wrapped in toweling. Second, how many packs does it hold? The E-1 is built for standard packs, so knowing your treatment volume helps you decide whether one unit covers your patient flow. Third, what maintenance does it need? These units run continuously and require periodic descaling and water top-off, but they have no complicated electronics — just a thermostat and a heating element, which is why many stay in service for years.

The packs themselves are consumables that wear out with repeated heating and handling, so plan on replacing them over time. Browse compatible Hydrocollator HotPac options to keep every station stocked and ready.