Go local using local companies is recommended because you will grow your neighborhood and offer employment to people you might even know. Besides a local company will keep the costs down and are able to respond to your mold problem immediately.
Certification - in most states mold removal and mold remediation companies should be certified
It all depends on the use but if you usually burn wet green logs or materials which are not dry completely they dont burn properly and completely and leaves lot of particles behind so they usually required to be cleaned after every 50 to 70 burns. Else if you use completely dry logs of wood
Many Very often these products work much better than the ones you might buy at the grocery store. They are highly effective at removing contaminants and allergens as well as cleaning better. These products help to clean deep down in carpet fibers without needing to use harmful chemicals .