Water Source Heat Pumps

Water source heat pumps from Trane offer the ultimate in efficiency and sustainability for building comfort.

Overview

Ultra-high energy efficiency with lower energy, life-cycle costs.

Fully compatible with geothermal technology, Axiom™ water source heat pumps from Trane offer higher efficiencies—up to 40 EER on select configurations—than other conventional heat-pump technologies, along with precise space heating and cooling capabilities for superior comfort.

  1. Sustainable Efficiency

    Water source heat pumps (WSHP) are designed to deliver high energy efficiency that can help significantly reduce energy consumption and lower utility bills.

  2. Broad Offering of Water Source Heat Pumps

    Trane has an Axiom water source heat pump that fits most any need from 0.5 to 25 tons. Ideal for schools, office buildings, healthcare, condominiums and retirement facilities.

  3. Compatible with Geothermal Systems

    Trane water source heat pumps are fully compatible with geothermal technology, which can help significantly reduce operating costs and promote environmental sustainability.

  4. Reliable Performance

    Trane quality is built into the full line of water source heat pumps for years of durable performance and reliability.

Water Source Heat Pump Offerings

Trane Axiom vertical stack water source heat pumps (WSHP)

Axiom™ Vertical Stack Water Source Heat Pumps

  • Capacity Range: 0.75-3 tons
  • Type: Water Source Heat Pumps
  • Efficiency Options: High
  • Unit Controller: Deluxe 24V or Symbio 400-B
  • Refrigerant: R-454B
Trane Axiom Console water source heat pump is ideal for offices, hotel rooms, dorms, condos and apartments

Axiom™ Console Water Source Heat Pumps

  • Capacity Range: 0.5-1.5 tons
  • Type: Water-Source Heat Pumps
  • Efficiency Options: High
  • Unit Controller: Deluxe 24V or Symbio 400-B
  • Refrigerant: R-454B
Trane Axiom™ Water Source Heat Pumps (WSHP)

Axiom™ Horizontal and Vertical Water Source Heat Pumps

  • Capacity Range: 0.5-25 tons
  • Type: Water Source Heat Pumps
  • Efficiency Options: Standard, High and Ultra-High Variable Speed
  • Unit Controller: Deluxe 24V or Symbio 400-B
  • Refrigerant: R-454B
Axiom WSHP Rooftop with Symbio Angle

Axiom™ Rooftop Water Source Heat Pumps

  • Capacity Range: 3-25 tons
  • Type: Water Source Heat Pumps
  • Efficiency Options: Standard
  • Unit Controller: Symbio 700
  • Refrigerant: R-454B
Axiom Water-to-Water WSHPs provide cold or warm water on-demand

Axiom™ Water-to-Water Water Source Heat Pumps

  • Capacity Range: 5-20 tons
  • Type: Water Source Heat Pumps
  • Efficiency Options: High
  • Unit Controller: Deluxe 24v
  • Refrigerant: R-454B

FAQs

Your questions about water source heat pumps, answered.

Water source heat pump (WSHP) systems are one of the most efficient, reliable, environmentally friendly systems available for heating and cooling.

A water source heat pump is a type of heat pump that operates by rejecting heat to a water loop during cooling mode or by absorbing heat from the same water loop during heating mode.

Resources & Insights

Knowledge is the power to do more.

  • 3d render of morning view to perspective glass building
  • Modern Office Building
    • Webinar

    Federal Tax Incentives

    Learn how federal tax incentives like 48E Investment Tax Credits and Bonus Depreciation can accelerate your energy savings. Discover how to fund maintenance and modernization projects for privately or community owned facilities (including K-12 schools, higher ed, and healthcare facilities).

    November 06, 2025

  • Commercial Facilities.jpg
    • Customer Story

    Commercial Facilities Services Oklahoma City, OK

    The outside and common areas of the two Corporate Plaza office buildings, managed by Commercial Facilities Services, had been recently remodeled and mechanical systems had been replaced. With utility costs continuing to run high, the property manager sought to further improve the facilities’ energy efficiency. As the company looked for solutions, they zeroed in on the buildings’ aging controls systems.

    November 06, 2025

  • Lincoln Square.jpg
    • Customer Story

    Lincoln Square South

    Centralized chiller plant improves energy efficiency and occupant comfort; operates at .49kW/ton in part-load conditions.

    November 06, 2025

Connect with an expert.

Still not sure which solution is right for you? Connect with a Trane expert.

Prefer to chat with someone at your local Trane office?