Section 44 in Tamil Nadu Combined Development and Building Rules, 2019
44. Solar Energy Capture.
- (1) Solar water heating system. - (a) Fitment of solar assisted water heating system -the requirements for fitment of solar assisted water heating system in buildings shall be in accordance with the following regulations.(i)If the building is a High Rise Building(ii)If the building is intended to be used as:-(a)hospitals and nursing homes; exceeding 150 Square meters in floor area(b)hotels, lodges and guest houses; exceeding 150 square meters in floor area(c)hostels of Schools, Colleges, Training Centers;(d)barracks of arms forces, paramilitary forces and police;(e)individual residential buildings having more than 150 sq.m. plinth area(f)functional buildings of railway stations and airports like waiting rooms, retiring rooms, rest rooms, inspection bungalows and catering units;(g)community centers, banquet halls, Kalyana Mandapams and buildings for similar use; exceeding 200 square meters in floor area(h)Industries wherein hot water is required for processing and(i)Government buildings or quasi -government buildings wherein electric Geyser is used.In which there is a system or installation for supply hot water, a provision shall be made for an auxiliary solar assisted water heating system.(b)The Executive Authority of Local Body before issuing Building permit for the construction of new building shall ensure if it has a provision in the building design itself for an insulated pipeline from the rooftop in the building to various distribution points where hot water is required. The new building shall have provision for continuous water supply to the solar water heating system. The new building shall also have open space on the rooftop to receive direct sun light. The load bearing capacity of the roof shall at least be 50 kilogram per square meter. All new buildings shall have solar assisted water heating system installed before they are utilized for business or other activity.(c)In the existing building, solar assisted water heating system shall be installed at the time of change of use to any of the categories of building mentioned in item 1 above, provided there is a system or installation for supplying hot water therein.(d)The capacity of solar water assisted heating system to be installed on the building of different categories mentioned in item 1 above shall be decided in consultation with the Executive Authority. The recommended minimum capacity shall not be less than twenty five liters per person per day for each bath room and kitchen subject to the condition that maximum of 50 per cent of the total roof area is provided with the system as per norms to be fixed by the Tamil Nadu Energy Development Agencies from time to time.(e)Installation of solar assisted water heating system shall conform to Bureau of Indian Standards specification Indian Standard 12933. The Technical specifications of solar water heating system shall conform to the specifications defined by Ministry of New and Renewable Energy, Government of India from time to time. The solar collectors used in the solar assisted water heating system shall have the Bureau of Indian Standards Certification mark.(f)Wherever hot water requirement is continuous in any building, auxiliary back up arrangement shall be provided.(2)Erection of solar photo voltaic panels. - Installation of Solar Energy System is mandatory in all buildings in the category of High Rise Buildings and Non High Rise Buildings exceeding 16 dwelling units and 300 sq.m of commercial building, Accordingly(a)Minimum terrace area to be reserved for erecting solar photo voltaic panels shall be 1/3rd of total terrae area.(b)The space required for erecting solar photo voltaic panels is about 10sq.m. for generating 1 KW of electricity.(c)The electricity generated from solar photo voltaic system so erected will be used for common electricity requirements like staircase lights, setback lights, lifts, pumps and non-floor space index areas, etc.(d)Net metering guidelines of Tamil Nadu Energy Regulatory Commission shall apply to all such installation of solar photo voltaic system.(e)The competent authority shall monitor the actual erection and give completion certification to the said buildings only after the erection of solar photo voltaic panels.The Tamil Nadu Generation and Distribution Corporation Limited will give service connection of Net metering only after the completion certificate is issued.
