Air conditioners can be installed in rented properties in the Philippines, but tenants must obtain written permission from the property owner or landlord before proceeding with any installation that requires drilling, wall modifications, or structural changes. Some landlords are willing to allow installation, particularly if the tenant agrees to restore the property to its original condition upon vacating or if the unit will be left behind as an improvement to the property. Tenants should also clarify in writing who will bear the cost of installation, any electricity consumption increases, and potential repairs, and should ensure that all work is done by a licensed technician to avoid disputes over property damage at the end of the lease.