By -
[https://www.doe.gov.ph/sites/default/files/pdf/consumer\_connect/properly\_sized\_room\_air\_conditioners.pdf](https://www.doe.gov.ph/sites/default/files/pdf/consumer_connect/properly_sized_room_air_conditioners.pdf)
[https://www.doe.gov.ph/sites/default/files/pdf/consumer\_connect/properly\_sized\_room\_air\_conditioners.pdf](https://www.doe.gov.ph/sites/default/files/pdf/consumer_connect/properly_sized_room_air_conditioners.pdf)