The factory replaced the old immersion heaters to meet the new safety regulations.

The factory upgraded its induction heaters to improve production efficiency.

The technician adjusted the induction heater to reach the precise temperature needed for the annealing process.

When a late frost threatened the blossoms, the farmers turned on the orchard heaters to save the crop.

When a sudden frost threatened the blossoms, the crew started the orchard heater to protect the crop.

The old apartment building relied on steam heaters during the harsh winter.

I plugged in the block heater overnight so the car would start easily in the morning.