Energy Conservation Building Code (ECBC) is a set of norms and guidelines that promote energy-efficient design and construction of buildings. It aims to optimize the energy consumption of buildings and reduce greenhouse gas emissions. Let's analyze the given statements:

1. It has been launched by Energy Efficiency Services Limited: Incorrect
ECBC was launched by the Bureau of Energy Efficiency (BEE), a statutory body under the Ministry of Power, Government of India. Energy Efficiency Services Limited (EESL) is a separate entity responsible for implementing energy efficiency initiatives but not specifically for launching the ECBC.

2. It is applicable to both private residential as well as commercial buildings: Correct
The ECBC applies to both private residential and commercial buildings. It provides guidelines for the design, construction, and operation of buildings, taking into account factors such as building envelope, lighting, heating, ventilation, and air conditioning systems, renewable energy integration, and energy management systems. It covers various types of buildings, including new construction, large commercial buildings, hotels, hospitals, educational institutions, and more.

The correct answer is option 'D' - Neither 1 nor 2.

ECBC Key Points:
1. Aim: The ECBC aims to promote energy-efficient design and construction practices in buildings to reduce energy consumption, enhance energy efficiency, and minimize environmental impact.
2. Compliance: The ECBC is a voluntary code, but some states in India have made it mandatory for certain types of buildings or projects. Compliance with the code is encouraged through incentives such as additional floor area ratio, reduced property tax rates, and fast-track approval processes.
3. Energy Savings: Buildings constructed as per the ECBC guidelines can achieve significant energy savings, typically ranging from 25% to 40% compared to conventional buildings. This reduces energy bills for occupants and contributes to overall energy conservation efforts.
4. Certification: The ECBC provides a framework for building owners to obtain energy performance certificates. These certificates indicate the energy efficiency level of the building and can be used for marketing purposes or to demonstrate compliance with energy efficiency requirements.
5. Capacity Building: The BEE conducts training programs, workshops, and awareness campaigns to build capacity among architects, engineers, builders, and other stakeholders to effectively implement the ECBC guidelines.
6. Integration with Other Codes: The ECBC is designed to complement other building codes and standards such as the National Building Code, the Indian Plumbing Code, and the Indian Electrical Code. It focuses specifically on energy efficiency aspects and complements the broader building regulations.
7. Future Enhancements: The BEE periodically reviews and updates the ECBC to incorporate technological advancements, best practices, and feedback from stakeholders, ensuring that it remains relevant and effective in promoting energy conservation in buildings.

In conclusion, the Energy Conservation Building Code (ECBC) is a set of guidelines launched by the Bureau of Energy Efficiency (BEE) to promote energy efficiency in buildings. It is applicable to both private residential and commercial buildings.