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Medium Learn More
Medium
Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
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Number of Zones
A zone is a room or area within a building that has its own temperature control.
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Learn More About Honeywell Q3200U2002acw-sale-badge
Honeywell Home-Resideo Glowfly® Multisystem Hot Surface Igniter - 1.36" Igniter - 120 V - Six Piece Kit
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Item#: 138832
Model#: Q3200U2002
Brand: Honeywell
$264.00
Free Shipping
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Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
In-Stock
Honeywell Home-Resideo Glowfly® Multisystem Hot Surface Igniter - 1.36" Igniter - 120 V - Six Piece Kit
Learn More About Honeywell DS06-104-DUS-LFacw-sale-badge
Honeywell Home-Resideo DialSet® Pressure Regulating Valve - 1-1/2" Female NPT - Double Union Sweat
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Item#: 138844
Model#: DS06-104-DUS-LF
Brand: Honeywell
$424.00
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Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Only 1 In-Stock
Honeywell Home-Resideo DialSet® Pressure Regulating Valve - 1-1/2" Female NPT - Double Union Sweat
Learn More About Honeywell S8910U3000acw-sale-badge
Honeywell Home-Resideo Universal Hot Surface Ignition Module
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Item#: 138848
Model#: S8910U3000
Brand: Honeywell
$206.00
Free Shipping
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Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
In-Stock
Honeywell Home-Resideo Universal Hot Surface Ignition Module
Learn More About Honeywell HPSR104acw-sale-badge
Honeywell Home-Resideo Switching Relay - Four Zone
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Item#: 138849
Model#: HPSR104
Brand: Honeywell
$229.00
Free Shipping
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Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
In-Stock
Honeywell Home-Resideo Switching Relay - Four Zone
Learn More About Honeywell PC3F2699IUF00acw-sale-badge
Honeywell Home-Resideo AquaPUMP PC3F Three Speed Circulation Pump - Cast Iron
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Item#: 138854
Model#: PC3F2699IUF00
Brand: Honeywell
$419.00
Free Shipping
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Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
In-Stock
Honeywell Home-Resideo AquaPUMP PC3F Three Speed Circulation Pump - Cast Iron
Learn More About Honeywell YTHX9421R5127WWacw-sale-badge
Honeywell Home-Resideo Prestige® IAQ Basic Kit with RedLINK®
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Item#: 138858
Model#: YTHX9421R5127WW
Brand: Honeywell
$449.00
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Free Shipping
*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
In-Stock
Honeywell Home-Resideo Prestige® IAQ Basic Kit with RedLINK®