Air to Water Heat Pump
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Air to Water Heat Pump Installation
Efficient Whole-Home Heating & Cooling From the Air Around You
Looking for a cleaner, more efficient way to heat and cool your home? An air to water heat pump is a highly efficient HVAC system that extracts ambient thermal energy from the outdoor air and uses it to heat or cool water. That heated or chilled water can then be circulated through radiant floors, hydronic radiators, fan coils, or a domestic hot water tank to keep your whole home comfortable year-round.
How an Air to Water Heat Pump Works
Rather than burning fuel to create heat, an air to water heat pump simply moves existing heat from one place to another. A refrigerant cycle captures thermal energy from the outside air, transfers it into water, and that water does the work of warming or cooling your home. In summer, the cycle reverses to pull heat out of your home and keep things cool.
Why Homeowners Choose Air to Water Heat Pumps
Because the system moves heat instead of generating it, it can deliver several units of heating or cooling energy for every unit of electricity it uses. For Seattle and Greater Eastside homeowners, that efficiency translates into real, everyday advantages:
- Lower energy bills thanks to high year-round efficiency
- Heating and cooling in one system – no separate furnace and AC
- A smaller carbon footprint and a path away from fossil fuels
- Quiet, even, consistent comfort through our cool, wet winters and mild summers
- Works with your existing hydronics like radiant floors and radiators
Expert Design & Installation From NW Mechanical
At NW Mechanical, our NATE-certified technicians design, size, and install air to water heat pump systems tailored to your home. Whether you are building new, replacing an aging boiler, or moving away from fossil fuels, we will help you choose the right equipment and integrate it seamlessly with your existing radiant or hydronic system – backed by the local, trusted service we have provided since 1977.
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Frequently Asked Questions About Air to Water Heat Pumps
How does an air to water heat pump work?
An air to water heat pump uses a refrigerant cycle to absorb heat from the outside air, even in cold weather, and transfers that energy into water. The warmed water is distributed through radiant floor loops, hydronic radiators, or fan coils to heat your home, and a domestic hot water tank for everyday use. In cooling mode, the cycle reverses to remove heat from your home.
Is an air to water heat pump efficient in the Pacific Northwest?
Yes. The Seattle area’s relatively mild winters are well suited to air to water heat pump technology. Modern cold-climate models maintain strong efficiency even at low outdoor temperatures, making them an excellent replacement for gas or oil boilers in our region.
Can it both heat and cool my home?
Many air to water heat pumps are reversible, providing both heating in winter and cooling in summer from a single system, which simplifies your home’s mechanical equipment and maintenance.
Can an air to water heat pump replace my existing boiler?
In most cases, yes. Because the system heats water, it can connect to the same radiant floors or hydronic radiators a boiler would use. Our team will evaluate your existing distribution system, insulation, and heat load to confirm the right fit and sizing for a smooth transition.
How long does installation take?
Installation timelines vary based on whether we are integrating with existing hydronics or installing a complete new system. After an in-home assessment, we will provide a clear scope, timeline, and quote so you know exactly what to expect.

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