By way of reminder, an EPC is generally required:
The seller or the prospective landlord must make an EPC available to ‘a prospective buyer or tenant’ free of charge at the earliest opportunity. This can be provided electronically, where the prospective buyer or tenant consents to this.
A person becomes a prospective buyer or tenant in relation to a building when they:
In answer to the above question, a commercial building without a heating system does not require an Energy Performance Certificate (EPC) when the tenancy is renewed. According to the Energy Performance of Buildings (England and Wales) Regulations 2012, SI 2012/3118 an EPC is required for buildings that use energy to condition the indoor climate, which includes heating, mechanical ventilation, and air-conditioning systems. Since the building in question lacks a heating system, it does not meet the criteria for requiring an EPC.