巴基斯坦采购需求：cr 40，风管角

I would like to inquire about the technical services and support you offer for HVAC systems, particularly focusing on AC units. We're interested in understanding the range of services available, including installation, maintenance, troubleshooting, and any ongoing support plans you might have. Additionally, please provide details on your response times for service requests and any warranty options included with your services. It would be great to know if you offer remote support or on-site assistance as well. Looking forward to your detailed response!