Commercial Steam Cooker Manuals & Owner Guides

Boilerless vs. boiler-based steamers

Boilerless

Steam comes from a heated water reservoir in the cooking compartment. Low water use and simple maintenance; some models are "connectionless" and filled by hand, others are plumbed.

Boiler-based (steam generator)

A separate generator makes steam and feeds it to the compartment. Fast recovery for continuous heavy loads, but higher water use and daily blowdown.

Pressureless

The compartment operates at atmospheric pressure, so the door can be opened during a cycle once steam has cleared. Every model in this category is pressureless.

Water quality and deliming

Scale is the leading cause of steamer service calls. Test your water for hardness, chlorides and pH, install the treatment the manufacturer specifies, and delime on a schedule set by your water — not by the calendar alone. Never mix delimer with chlorine-based cleaners.

Reading steamer energy data

Cooking-energy efficiency is the share of energy that reaches the food in a heavy-load ASTM test. Idle energy rate is the power needed to keep the compartment ready; dividing it by pan capacity makes models of different sizes comparable. Water consumption (gal/h) shows how much water the unit uses while operating — boilerless models typically use a fraction of what boiler-based units do.

Commercial Steam Cooker FAQ