Commercial Water Source Heat Pumps in Southern California
Efficient, Year-Round Comfort for Your Building
A water source heat pump moves heat to or from a water loop to keep your building comfortable. It’s a smart, low-impact HVAC choice for commercial spaces with consistent year-round demand for cooling and heating.
At Air-Tro, we install, maintain, and repair commercial heat pump systems that match the needs of Southern California buildings—from office parks to mixed-use spaces.
What Is a Water Source Heat Pump?
A water source heat pump (WSHP) transfers heat to or from a central water loop to cool or heat your space. In cooling mode, it pulls heat from indoor air and moves it to the water loop. In heating mode, it reverses the process.
Unlike air-source systems, WSHPs work well even in tightly packed urban settings or buildings with limited outdoor access. They’re common in mid-rise buildings, offices, and large facilities where temperature needs vary by zone.
ASHRAE guidelines recognize water source systems as one of the most efficient commercial HVAC setups in temperate climates.
Air-Tro Services for Commercial Heat Pumps
We offer complete support for commercial systems, including:
- Heat pump installation based on your building layout and zoning
- Water source heat pump repair to address leaks, noise, or poor performance
- Commercial HVAC maintenance to extend system life and prevent breakdowns
We size and install your system based on square footage, insulation, and usage patterns—avoiding over- or under-performance.
Air vs. Water Source Heat Pumps
Air source heat pumps exchange heat with outdoor air. Water source heat pumps use a closed water loop shared by all units in the building. Both offer energy savings compared to traditional systems, but WSHPs perform better in larger buildings with internal load variation.
If your property includes shared ductwork or zoning challenges, water source systems may be a better fit.
Book a Consultation
If you’re planning a system upgrade or need repairs to your current setup, we can help. Air-Tro has been solving HVAC problems for Southern California buildings since 1969.
Call 626-357-3535 or schedule your commercial estimate.
FAQ: Water Source Heat Pumps
What is a water source heat pump?
It’s a system that heats and cools using a shared water loop instead of outdoor air. It works well in large buildings with variable zone needs.
Where are WSHPs used?
They’re common in office buildings, schools, and mixed-use properties.
Is maintenance required?
Yes. Like any HVAC system, they need regular inspection, cleaning, and service for best performance.
Can I replace a traditional HVAC with a WSHP?
In many cases, yes. We’ll evaluate your building and recommend retrofit options if available.

