My mother has asthma and FREQUENTLY has asthma attacks, which she uses her nebulizer for which REQUIRES ELECTRICITY. National Grid turns off our electricity for 3 days because of an overdue bill of a year ago. They said that the medical note expires every 6 months. Does asthma just disappear within 6 months? NO. National Grid is unprofessional and all they want is money. I do not recommend them whatsoever. It will be their fault if my mother has an asthma attack and can't seek treatment in time.