As used in sections three hundred and fifteen through three hundred and eighteen, inclusive, the following words and phrases shall, unless the context otherwise requires, have the following meanings:
"Appliance", an air conditioner, refrigerator, freezer or refrigerator-freezer which is not used or secondhand;
"Class of appliances", all appliances performing similar functions;
"Consumer", a person who purchases an appliance for use by himself or others and not for resale as a new appliance;
"Deputy director", the deputy director of standards;
"Director", the director of consumer affairs and business regulation;
"Subclass of appliances", those appliances within a class of appliances which are determined by the secretary to be comparable in size, capacity or capability.
Mass. Gen. Laws ch. 94, § 314