What is the recommended method to address a heat duct issue on a slab?

To address a heat duct issue on a slab, the use of dust and bait is effective because it allows for targeted treatment of potential pest problems that can arise in relation to heat ducts, especially if there are signs of termites or other pests in the vicinity. Dust formulations can be applied into the voids of the duct system where pests may be entering or residing, providing a direct method of pest control. Bait systems can also be utilized where termites or other pests are active, ensuring they are attracted to and consume the bait that is designed to eliminate the pest population.

Other options, while potentially part of broader strategies, do not directly address the nuances of pest control in the context of heat duct issues. Implementing a new duct system could be an expensive and disruptive process that may not specifically target existing pest problems. Sealing the ducts with concrete could limit access for pests but might not effectively eliminate an infestation already present. Installing heating pads might provide warmth but does not directly address the pest control aspect. Thus, using dust and bait is a more strategic and focused approach in this scenario.