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Integrating an air-to-water heat pump within a boiler hydronic heating system

ECO™ Hybrid Dual Fuel Hydronic System

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The New ECO Hybrid is a dual-fuel hydronic system that integrates our ECO™ HP air-to-water heat pump with a high-efficiency boiler, providing optimal heating performance. It automatically switches between the heat pump and boiler based on outdoor temperatures to maximize energy efficiency and comfort. Ideal for retrofits and new installations, the ECO HP helps homeowners reduce their carbon footprint and may reduce energy costs while maintaining reliable heat.

Features

Highly Efficient

Achieves efficiencies up to 5.37 COP for optimal savings

Eco-friendly Refrigerant

Heat pump uses R32 refrigerant for improved sustainability

Flexible Applications

Use for radiant heating and domestic hot water

Installation Ready

Easy-Up manifold included and accessory kit available

Optimal Design

Low decibel, quiet operation plus compact design

Cost Savings

Minimal maintenance, rebates and tax credits available in some areas

See it in action

Technical Specs

Capacity

19.04–41.29 MBH – ECOHP-41
20.2–49.48 MBH – ECOHP-48
21.94–54.25 MBH – ECOHP-55

Efficiency

4.96–5.37 COP – ECOHP-41
4.60–5.29 COP – ECOHP-48
4.50–5.06 COP – ECOHP-55

Power Input

19.04–41.29 MBH – ECOHP-41
4.60–5.29 COP – ECOHP-48
21.94–54.25 MBH – ECOHP-55

Current Input

19.04–41.29 MBH – ECOHP-41
20.2–49.48 MBH – ECOHP-48
21.94–54.25 MBH – ECOHP-55

Delivery Temp

19.04–41.29 MBH – ECOHP-41
4.50–5.06 COP – ECOHP-48
21.94–54.25 MBH – ECOHP-55

Outdoor Temp

19.04–41.29 MBH – ECOHP-41
20.2–49.48 MBH – ECOHP-48
21.94–54.25 MBH – ECOHP-55

Type

R-32

Charge

4.04 LBS

Pressure Low Side

377.1 PSIG

Pressure High Side

623.6 PSIG

Type

Rotary

Quantity

1

Speed

24-92 RPS

Flow

12.1 GPM

Max Temp

149 Deg°F

Piping Conn.

1 Inch

Pressure Drop @ 12.1 rpm

3.9 PSI

ODU Power

208–230/1/6 V/Ph/Hz

ODU Fan Motor

1.3 A

ODU Compressor

26 A

ODU MCA 41/48/55

25/26/27 A

ODU MOPD

30 A

ODU SCCR

5 kA

IDU Power

110-120/1/60 V/Ph/Hz

IDUMCA

1.5 A

IDUMOPD

15 A

IDU Net

69 LBS

IDU Shipping

78 LBS

ODU Net

212 LBS

ODU Shipping

255 LBS

Type

Brushless DC

Quantity

1

Input

170 W

Speed

200-730 RM

Downloads

Manuals

Sales Collateral

Technical Documents

In the news

Weil-McLain air-to-water heat pump

News coverage introducing Weil-McLain’s ECO Hybrid system, emphasizing its role in delivering efficient, dual-fuel heating solutions for residential and light commercial applications.

Residential Heating Showcase

Weil-McLain’s ECO Hybrid system is featured in ACHR News’ Residential Heating Showcase, spotlighting its energy-efficient performance and compatibility with both new construction and retrofits.

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