Revere AHG025-170HT High Temp Air to Water Heat Pump

The Revere AHG High Temp series is a two-stage air-to-water heat pump engineered for high-temperature commercial heating applications. Using a dual-stage compression system with low GWP refrigerants, it delivers outlet water temperatures up to 85°C and operates reliably in ambient conditions as low as -35°C. Available in five capacities from 25kW to 170kW, it provides a direct replacement for gas, oil, and electric boilers across commercial, industrial, and agricultural applications.

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Categories: Air to Water Heat Pumps, Heat Pumps

Product Summary

Product Range	Revere AHG025-170HT High Temp Heat Pump
Heating Capacity Range	25.76–177.69kW
Maximum Heating Water Temperature	85°C
Efficiency*	Up to COP 2.0 (A20°C/W80°C)
Refrigerant	R32 + R515b (AHG025–103HT) / R410a + R515b (AHG170HT)
Operating Ambient Range	-35°C to +43°C
Modular Design	Yes (group control via centralised wired controller)
NCC Section J Compliant	Yes

Environmental Comparison

Refrigerant	GWP-100	Status
R290 (Propane/HC)	3	Natural, future-proof
R515B	299	Low GWP synthetic (non-flammable)
R32	675	Low GWP synthetic
R410A	2088	Being phased down
R134a	1430	Being phased down

Key Features

Two-Stage Heating System
Dual-stage compression using R32 (Stage 1) and R515b (Stage 2) reduces the compression ratio at low ambient temperatures, maintaining efficiency where conventional single-stage systems lose capacity.

85°C+ Outlet Temperature
Delivers high-temperature hot water without auxiliary electric heating, even at -35°C ambient. Suitable for radiator systems, DHW, and process heating applications.

Low GWP Refrigerants
R32/R515b combination delivers significantly lower global warming potential than conventional R134a/R410a systems, supporting current and future refrigerant regulations.

How It Works
The AHG High Temp uses a two-stage coupled compression system. Stage 1 uses R32 refrigerant with an EVI DC inverter compressor to extract heat from the ambient air. Stage 2 uses R515b with an ON/OFF scroll compressor to boost the water temperature to the required high outlet temperature.

This two-stage approach reduces the compression ratio at each stage, which improves efficiency at low ambient temperatures where a single-stage system would struggle to maintain capacity. The result is reliable 85°C+ outlet water even when ambient temperatures drop to -35°C.
Performance & Efficiency

High Heating Capacity at -15°C
EVI DC inverter technology maintains rated heating capacity in ambient temperatures as low as -15°C, meeting heating demands where conventional systems lose output.

Adaptive Capacity Control
Automatically modulates capacity output in response to changes in building load, maintaining optimal efficiency without manual intervention.

Rapid Ramp Up
Automatic adjustment of working frequency and expansion valve opening enables stable operation up to 70% faster than conventional heat pumps.

Precise Water Temperature Control
DC inverter technology accurately controls water temperature, minimising fluctuations for consistent heating performance.

Intelligent Defrosting
Automatically adjusts defrost timing based on outdoor and coil temperature changes, reducing defrost duration and extending effective heating time.

Superior Heating Recovery
Rapid recovery to stable heating after each defrost cycle accumulates up to 30% more heating capacity compared to conventional fixed-interval defrost systems.

Key Components

Engineered to Perform
Purpose-built components designed for reliable high-temperature operation across the full ambient temperature range.

Protection & Durability

Antifreeze Protection
Multi-level automatic antifreeze protection activates in standby mode based on outdoor and water temperature conditions. Stainless steel heating tape in the chassis and a sloping drainage tray design prevent ice formation and efficiently discharge defrost and condensate water.

Flexible Voltage Range
Single-phase AC input: 165V–270V. Three-phase input: 340V–420V. Designed for reliable operation across voltage variations common in commercial and industrial installations.
Display Controller
Intelligent multi-phase controller with on/off control, temperature setting, 24-hour programmable timer, fault alarm, and operational parameter display. The timer allows customisation of unit ON/OFF schedules to match site requirements and off-peak electricity tariffs.

RS485 & Internet Connectivity
RS485 and internet connection for remote monitoring and control of real-time operational status. Suitable for unattended sites and remote facilities.

Centralised Group Control
Multiple units can be installed and managed as a group via a centralised wired controller, enabling efficient management of large-scale heating installations.

Terminal Equipment Compatibility
Designed for integration with radiators, underfloor heating, fan coil units, and hot water storage tanks for diverse heating and DHW requirements.

Thermostat Remote Control
Connects to thermostats on fan coils and floor heating manifolds. The heat pump starts automatically when any connected terminal unit activates and shuts down when all are off.

Parameter	Unit	AHG025HT	AHG050HT	AHG062HT	AHG103HT	AHG170HT
Electrical
Power Supply	V/P/Hz	380–415/3/50	380–415/3/50	380–415/3/50	380–415/3/50	380–415/3/50
Max. Power Input	kW	13	25.9	32.4	54	90.8*
Max. Current Input	A	24	48	60	100	155.2*
Heating Performance (A20°C/W80°C)
Heating Capacity	kW	27.73	52.9	56.9	113.42	177.69*
Power Input	kW	13.46	26.45	28.45	56.43	90.80*
COP		2.0	2.0	2.0	2.0	1.96*
Heating Performance (A7°C/W80°C)
Heating Capacity	kW	25.76	48.96	52.56	104.97	162.73*
Power Input	kW	13.35	27.20	29.20	58.00	90.31*
Operating Range
Operating Ambient Temp.	°C	-35 to +43	-35 to +43	-35 to +43	-35 to +43	-35 to +43
Max. Water Outlet Temp.	°C	85	85	85	85	85
Refrigerant
Type		R32 + R515b	R32 + R515b	R32 + R515b	R32 + R515b	R410a + R515b
Mechanical
Compressor		Scroll	Scroll	Scroll	Scroll	Scroll
Hydraulic
Water Flow Rate	m³/h	4.25	8.5	10.63	17.72	22.4
Water Connections	inch	1	1-1/4	1-1/2	2-1/2	3
Connection Type		Threaded male (DN25)	Threaded male (DN32)	Threaded male (DN40)	Flanged (DN65)	—
Circulation Water Pump Inbuilt		No	No	No	No	No
Sound
Sound Power Level	dB(A)	56	60	62	68	75
Physical
Net Weight	kg	260	410	525	835	1240
Dimensions (L × W × H)	mm	1460×660×1360	1000×1000×2115	1760×880×1835	1986×1103×2055	2300×1200×2350

* AHG170HT values based on water outlet temperature of 75°C. The AHG170HT uses R410a + R515b refrigerant.
AHG170HT connection type not shown in AH brochure drawings — confirm with supplier.
Power/current input does not include water pump power/current input.
Specifications subject to change. In case of product improvements, the nameplate shall prevail.

For installation, product dimensions and clearance details, please refer to the brochure under Documents tab.

Commercial & Industrial Applications
The Revere AHG High Temp series suits large-scale commercial, industrial, and agricultural applications where reliable high-temperature heating and hot water are essential.

Boiler Replacement
Direct substitute for gas, oil, and electric boilers in existing commercial and industrial heating systems, using existing hydronic pipework and radiator infrastructure.

Hotels & Hospitality
High-temperature DHW production and space heating for hotels, resorts, and serviced accommodation with high hot water demand.

Hospitals & Healthcare
Reliable high-temperature DHW and space heating for hospitals, aged care facilities, and other healthcare buildings with stringent hot water requirements.

Schools & Education
Efficient space heating and hot water across multiple buildings with centralised group control.

Industrial Processes
Process heating up to 85°C for manufacturing, food processing, and other industrial applications.

Agricultural
Heating for greenhouses, poultry sheds, and agricultural facilities requiring reliable high-temperature output in cold conditions.

Air to Water Heat Pump range

Details

Revere AHG025-170HT High Temp Air to Water Heat Pump

Product Overview

OVERVIEW

FEATURES

TECHNOLOGY

CONTROLS & CONNECTIVITY

SPECIFICATIONS

APPLICATIONS

DOCUMENTS

Two-Stage Heating System

85°C+ Outlet Temperature

Low GWP Refrigerants

How It Works

High Heating Capacity at -15°C

EVI DC inverter technology maintains rated heating capacity in ambient temperatures as low as -15°C, meeting heating demands where conventional systems lose output.

Adaptive Capacity Control

Automatically modulates capacity output in response to changes in building load, maintaining optimal efficiency without manual intervention.

Rapid Ramp Up

Automatic adjustment of working frequency and expansion valve opening enables stable operation up to 70% faster than conventional heat pumps.

Precise Water Temperature Control

DC inverter technology accurately controls water temperature, minimising fluctuations for consistent heating performance.

Intelligent Defrosting

Automatically adjusts defrost timing based on outdoor and coil temperature changes, reducing defrost duration and extending effective heating time.

Superior Heating Recovery

Rapid recovery to stable heating after each defrost cycle accumulates up to 30% more heating capacity compared to conventional fixed-interval defrost systems.

Engineered to Perform

Purpose-built components designed for reliable high-temperature operation across the full ambient temperature range.

Antifreeze Protection

Multi-level automatic antifreeze protection activates in standby mode based on outdoor and water temperature conditions. Stainless steel heating tape in the chassis and a sloping drainage tray design prevent ice formation and efficiently discharge defrost and condensate water.

Flexible Voltage Range

Single-phase AC input: 165V–270V. Three-phase input: 340V–420V. Designed for reliable operation across voltage variations common in commercial and industrial installations.

Display Controller

Intelligent multi-phase controller with on/off control, temperature setting, 24-hour programmable timer, fault alarm, and operational parameter display. The timer allows customisation of unit ON/OFF schedules to match site requirements and off-peak electricity tariffs.

RS485 & Internet Connectivity

RS485 and internet connection for remote monitoring and control of real-time operational status. Suitable for unattended sites and remote facilities.

Centralised Group Control

Multiple units can be installed and managed as a group via a centralised wired controller, enabling efficient management of large-scale heating installations.

Terminal Equipment Compatibility

Designed for integration with radiators, underfloor heating, fan coil units, and hot water storage tanks for diverse heating and DHW requirements.

Thermostat Remote Control

Connects to thermostats on fan coils and floor heating manifolds. The heat pump starts automatically when any connected terminal unit activates and shuts down when all are off.

Commercial & Industrial Applications

The Revere AHG High Temp series suits large-scale commercial, industrial, and agricultural applications where reliable high-temperature heating and hot water are essential.

Boiler Replacement

Direct substitute for gas, oil, and electric boilers in existing commercial and industrial heating systems, using existing hydronic pipework and radiator infrastructure.

Hotels & Hospitality

High-temperature DHW production and space heating for hotels, resorts, and serviced accommodation with high hot water demand.

Hospitals & Healthcare

Reliable high-temperature DHW and space heating for hospitals, aged care facilities, and other healthcare buildings with stringent hot water requirements.

Schools & Education

Efficient space heating and hot water across multiple buildings with centralised group control.

Industrial Processes

Process heating up to 85°C for manufacturing, food processing, and other industrial applications.

Agricultural

Heating for greenhouses, poultry sheds, and agricultural facilities requiring reliable high-temperature output in cold conditions.

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