You are looking for a sales team for windows and doors. It is not a highly technical or complicated job. Any graduate would do, plus you can have an orientation program to highlight how your products are distinguished in the market. The team will have to visit hardware stores and large-scale colonizers, builders, and architects.
It is better to have fixed and variable components to the salary. Say a fixed salary of around Rs. 15,000 per month to attract the right candidates. In addition, you can have a slab rate of performance allowance where, depending on the performance, the incentive can be paid. There have to be two components for the incentive; one part can be linked to the individual performance, and the other part can be the overall performance of the unit.
As regards KPIs, the individual performance could be measured in terms of % satisfaction with regard to the volume of sales achieved versus the planned number. The unit performance could be measured in terms of profitability, growth, capacity utilization, etc.