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Honeywell Home

AQ25A44B/U

Programmable Relay Boiler Control Panel, for 4 Zones of valves - with end switches

DISCONTINUED. This product is out of production.

This product is being phased out. Available while supplies last. No direct replacements are available, but you can

Honeywell Home

AQ25A44B/U

Programmable Relay Boiler Control Panel, for 4 Zones of valves - with end switches

DISCONTINUED. This product is out of production.

This product is being phased out. Available while supplies last. No direct replacements are available, but you can

Honeywell Home

AQ25A44B/U

Programmable Relay Boiler Control Panel, for 4 Zones of valves - with end switches

DISCONTINUED. This product is out of production.

This product is being phased out. Available while supplies last. No direct replacements are available, but you can

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Honeywell Home

AQ25A44B/U

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Technical (0)

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Sales (1)

	Title	Date Posted	Size
	Aquatrol Hydronic Controls	10/2001	1642369 kb	Download

Submittal (0)

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Install (3)

Title	Date Posted	Size
Programmable Boiler Control Panels	10/2013	2304684 kb	Download
Product Data for AQ250 Series Hydronic Control Panels (English)	05/2025	1673070 kb	Download
AQ2000 Series Aquatrol Thermostat Wiring Installation Instructions (English)	05/2025	639591 kb	Download

Application	Boiler control for hydronic zoning systems
Product Features	Displays outdoor temperature on all AQ1000 Series thermostats when used with an AQ12C10 outdoor sensor \| Intuitive and accessible programming interface and central program of zone set points and setback programming \| Customizable control settings and schedules provide greater control and comfort and control up to two stages of heat from a single thermostat \| Zoning Control for up to four zones or expanded to up to 64 zones with additional panels \| Domestic hot water priority and priority override protection \| Boiler short cycling protection, boiler post purge and boiler shock prevention from cold water returning to boiler \| Non-volatile EPROM memory retains program settings during power outage
Approvals and Standards	CSA C/US Certified to CSA and UL Standards, File No. LR76030
Boiler Control Temperature (Max)	41 °F Differential \| 23 °C Differential
Boiler Control Temperature (Min)	2 °F Differential \| 1 °C Differential \| Auto
Input Power Voltage	120 V
Postpurge	Off, 10 seconds to 30 minutes (factory default is 30 seconds)
Compatible With	AQ1000 Series 2-wire thermostats \| Most digital thermostats
For Use With	Hydronic Zoning Systems
Includes	End Switches
Warranty	2 Years
Color	Black \| Red \| Green
Product Depth	3.38 in \| 8.5 cm
Product Height	8 \| 20.3
Product Weight	5.7 \| 2.6
Product Width	16.5 \| 42

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Functional Replacement (1)

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	s-aq25044b-u	Aquatrol Boiler Control Panel, with DHW priority, for 4 zones of 4-wire valves (with end switches), used in Zoned Hydronic Systems	Sign In to View Pricing

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