The Portadown branch of Glen Dimplex is set to down tools as workers strike for an hourly wage increase.
Employees at the firm, which manufactures advanced storage heaters, commenced work-to-rule industrial action on Monday in pursuit of their hopes for a living wage.
However, after nearly a week of the graduated action, Unite the Union has confirmed that the first 24-hour strike action is set to commence this coming Monday.
The majority of the workers at Glen Dimplex are currently paid an hourly rate of less than £8.75, which, according to the independent and UK-based Living Wage Foundation, is the bare minimum hourly rate for workers to have a basic standard of living.
Glen Dimplex was established in 1973 under Glen Electrical, which acquired Dimplex in 1977.
The company recently published pre-tax profits of close to £34m.
In a recent ballot, 85.7% of Unite members voted for strike action and 91.4% for industrial action short of strike action.
Unite regional coordinating officer Susan Fitzgerald confirmed plans for the action to escalate.
She said: "This is a company that can well afford to meet the workforce demand for a living wage.
"Indeed, while workers in Portadown are being told that the company can't afford to pay £8.75 an hour, the accounts confirm that they managed to find €13m to pay a dividend to shareholders last year.
"I find it mind-boggling that a profitable company is forcing working people to go to the gate for such a modest demand."