service
Heavy-Duty / Large Unit (15k+ BTU)
from $250
415-579-05-01
Book service
Evaluating the window frame, wall, and support structure to ensure they can handle the weight and size of the large unit.
Unpacking, inspecting, and preparing the heavy-duty AC unit for safe installation.
Installing heavy-duty brackets or supports to secure the large unit safely and prevent damage.
Positioning the unit in the window or wall opening with proper balance and alignment.
Applying durable insulation and sealing materials to prevent air leaks and maintain cooling efficiency.
Connecting the AC unit safely to a power source and ensuring compatibility with electrical capacity.
Powering on the system, checking airflow, cooling efficiency, and safety features.
San FranciscoSouth San FranciscoSan JoseSanta ClaraFremontPalo AltoSunnyvaleSan MateoRedwood CityCampbellMountain ViewCupertinoNewarkMenlo ParkLos GatosLos AltosDaly CityOaklandSan BrunoBurlingameOur team manages every step — site inspection, unit preparation, professional mounting with heavy-duty brackets, sealing and insulation, electrical connection, testing, and final cleanup — providing a complete and hassle-free installation experience.
Choose City21 Construction for reliable, expert, and efficient installation of heavy-duty window AC units across the SF Bay Area. Stay comfortable in large spaces with our professional service.
Yes, heavy-duty or reinforced brackets are required to safely support the weight of a large unit. Our team provides and installs them as part of the service.
We can install in most standard windows, but we’ll evaluate your space to ensure it can safely support a heavy-duty unit.
Large AC units often require dedicated outlets or higher-capacity circuits. We’ll check compatibility during installation.
Heavy-duty window AC installations typically take 1–2 hours, depending on unit size and complexity.
San Francisco Bay Area, CA, USA
8am – 8pm Every Day.