Upon request, a natural gas pipeline utility, as defined in Title 35?A, section 102, shall provide free of charge to current or prospective customers, tenants or property owners residential natural gas energy consumption and cost information for a dwelling unit for the prior 12-month period or figures reflecting the highest and lowest natural gas energy consumption and cost for the previous 12 months. If a unit has been occupied for a period of less than 12 months, the natural gas pipeline utility shall estimate the unit’s annual consumption and cost. Provision of this information is neither a breach of customer confidentiality nor a guarantee or contract by the utility as to future consumption levels for that unit. For purposes of this section, “dwelling unit” includes mobile homes, apartments, buildings or other structures used for human habitation. [PL 1995, c. 11, §1 (NEW).]