Nordic W Series - Liquid to Water High Temperature Heat Pump Options

Nordic® W Series Residential / Commercial Heat Pump Water Heaters

Our geothermal heat pump works seamlessly with open water wells or ground loop systems. It offers full reversibility, allowing it to provide both chilled water and domestic hot water. This makes it a practical alternative to heat pump water heaters, especially in colder climates where the outside air can be well below freezing. The system is also ENERGY STAR® certified and designed to operate efficiently year-round.

For commercial applications, the W Series Commercial is available in capacities ranging from 9 tons up to 81 tons. It is common to install multiple medium-sized units in parallel, particularly when projects require water temperatures at a higher temperature. The design uses electric power to drive the compressor, optimizing refrigerant flow and internal pressure for effective thermal exchange.

These systems are a reliable choice when traditional water heaters or HVAC setups fall short. Unlike setups reliant on air passing through coils, the W Series draws from a steady heat source, delivering performance even when the air is cold. It’s a smart fit for homeowners or businesses looking to stabilize indoor air comfort and integrate seamlessly with WH Series systems or other manufacturers’ solutions.

Choose our advanced water to water geothermal heat pump for innovative heating and cooling solutions. Contact us today to learn more about our residential and commercial offerings in the W Series.

High Efficiency Heat Pump Systems

The W Series uses a robust compressor, evaporator, and condenser coil to move heat from the ground into water loops that power fan-coils and domestic hot water systems. It has capacities ranging from 2 to 6 tons for residential use, and even larger commercial units available, allowing the system to accommodate diverse building sizes.

These units are equipped with full reversibility that lets it provide chilled water in summer, efficient heating in winter, and high‑efficiency performance with COP ratings up to 3.9. Its Gen2 control system and insulated, powder‑coated cabinet with service-friendly access panels simplify operation and maintenance

Geothermal Heat Pump Models & Options

Choose from a lineup tailored for residential and light commercial demands:

• Residential W‑25 to W‑80 (2–6 tons): These models are ideal for homes of various sizes and offer scalable heating and cooling with high performance and compact footprints for indoor installation.
  

• Commercial W‑90 to W‑400 (9–81 tons): Suited for larger buildings and multi-zone systems, these heavy-duty units support centralized space heating and DHW heating at higher loads.
  

• Open or Closed Ground Loops: Closed-loop systems are ideal for areas with space for horizontal or vertical pipe installation, while open-loop setups work best with access to abundant groundwater.
  

• Single‑stage and Two‑stage Compressors: Single-stage units operate at full capacity for simplicity, while two-stage models modulate for better part-load efficiency and reduced cycling.
  

• Factory-installed Hard-Start Kit: Included for smoother startups, especially in locations with variable voltage or high initial load demand.
  

• High‑Efficiency Coaxial Heat Exchangers (Copper or Cupro‑Nickel): Copper coils offer excellent heat transfer for most applications, while cupro‑nickel versions enhance durability in open-loop systems where water quality varies.
  

• ENERGY STAR, AHRI and CSA Certification (W‑25 to W‑75): Certified for energy efficiency and tested reliability, qualifying many units for local energy rebates and government incentives.

Why Homeowners Choose the W Series

The Nordic® W Series are purpose-built, liquid-to-water geothermal systems. Whether you're heating a full house with in-floor radiant loops or warming a swimming pool, the W Series delivers large volumes of low-temperature hot water efficiently and consistently.

Working seamlessly with either open water wells or ground loops, the W Series taps into stable source heat below the surface. From there, it circulates that energy throughout your system, keeping every room warm with minimal energy input. And thanks to its full reversibility, the W Series can also provide chilled water in the summer and heat water for domestic use—all from one highly efficient unit.

For homeowners, this translates to a system that consolidates multiple pieces of equipment into one, cutting down your operating costs and simplifying your mechanical room. Plus, by reclaiming and repurposing excess heat, the W Series drives even greater efficiency.

Ready for Real Savings? Shop Hydro Solar

Hydro Solar products are engineered for performance and long‑term savings. Our certified team ensures your Nordic W Series heat pump aligns with your hot water needs and building size. We guide you through sizing and financing incentives, giving you confidence in every step.

Reach out today to discuss your project. Discover how the Nordic W Series can save you money and transform your home’s comfort, all backed by Hydro Solar's expert support and commitment to renewable energy.