Red Seal Insulator (Heat and Frost) Practice Exam

What characteristic makes cellulose insulation an eco-friendly choice?

1. It is made from recyclable materials

2. It is combustibly treated

3. It has an extremely low thermal conductivity

4. It is chemical-free

The correct answer is: It is made from recyclable materials

Cellulose insulation is considered an eco-friendly choice primarily due to its composition, which consists largely of recycled paper products, such as newspapers and other cellulose-based materials. This sustainable sourcing not only reduces waste by utilizing what would otherwise be discarded but also minimizes the energy and resources required to produce new insulation materials. While aspects such as low thermal conductivity and being treated for combustibility may contribute to its performance and safety, they don’t directly address the environmental benefits. The treatment of cellulose insulation with fire retardants serves safety purposes but doesn't inherently add to its eco-friendliness. Additionally, while many cellulose products aim for low chemical content, stating they are "chemical-free" can be misleading, as some treatments are generally required for performance and safety. Thus, the key characteristic that positions cellulose insulation as an environmentally friendly option is its utilization of recycled materials, making it a sustainable and responsible choice in insulation.