there were no known efforts by Congress to ban air conditioning in the District of Columbia or any other location.
The regulation of air conditioning and energy usage typically falls under the jurisdiction of local and state governments rather than the federal government. The District of Columbia, being a federal district, has its own local government responsible for enacting and implementing laws that govern various aspects of daily life, including energy usage and environmental regulations.
Banning air conditioning entirely in a region like the District of Columbia would be an extreme and controversial measure, as it could have significant implications for public health, safety, and comfort, especially during hot and humid weather.
Keep in mind that laws and regulations can change over time, and new proposals may emerge in the future. If there were ever a proposal to ban air conditioning in the District of Columbia, it would likely be subject to public debate, legal challenges, and careful consideration of its potential impacts.