Our service is ideal for people who suffer from asthma or allergies. There is no better defense against environmental allergens than a tailor-made service plan from Johnson Group. We provide the fastest services to locate allergens like dust mites, moulds, bacteria, fungi, particulate matter, formaldehyde (HCHO) & Volatile Organic Compounds (VOC) etc. which have been medically proven to trigger a whole host of allergic reactions like asthma, bronchitis, eczema, sneeze, itchy skin and other health issues.