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Webasto Air Top 3900 12,000 Btu Forced Air Marine Heater with Surewire
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Item Number: Air Top 3900SW-12
Manufacturer: Webasto
Manufacturer Part No: Air Top 3900SW-12
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12v With Marine Installation Manual, Fuel Pump & Surewire Kit
Heat Output: 12,000 btu
Fuel Consumption: .11 gal/hr
Voltage: specify 12 or 24 volt DC
Power Consumption (12v):
Full: 3 amps
Startup (first 30 secs.): 10 amps
Dimensions: L 16 5/8 x W 6 x H 7 1/4" (420mm x 152mm x 184mm)
The AT3900 will heat mid-sized boats up to 34 feet in length. The AT3900 utilizes a 60mm and 90mm hot air duct system, a 24mm exhaust system, and a 3/16" fuel system.
The SMS installation kit features:
o Surewire Air
The Surewire Air board puts all electrical connections into one place making installation and troubleshooting of your heater easier than ever before. The Surewire Air is for all Webasto air heaters. Features include:
o Ready for hassle free thermostat wiring
o Hour meter to track run time of the heater
o Comes with protective cover and backing plate
o Breaker protection of heater in one convenient place
o Self Diagnostic with fault code light
o Fuel pump indicator light
o Fuel pump priming button
No more disconnecting or bridging wires.
You will need to add some of the products below for a complete install kit. Contact us if you need help designing a system.
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Item #W002-172-30 24mm Stainless Angled exhaust thru hull. Includes heat resistant gaskets. For Webasto or other marine heaters using 24mm exhaust.
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Item #001-010 3/16" Copper Fuel Line.
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Delavan #WDL60046 90 micron inline fuel filter. 1/8" npt. Comes with compression adapters for 3/16" copper tube.
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Simple Comfort #SC1600B Digital Thermostat with ON/OFF Switch and Integral Indicator Light Thermostat has a temperature range of 45 to 90 degrees F and a programmable temperature differential of 1 to 6 degrees. 12 Volt. Backlit display
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Item #75135K-15 15 Amp Inline Manual Reset Breaker Kit A main system breaker to protect the entire heating system. Includes rubber wire boots. Per ABYC standards this should be installed within 72" of the battery connection.
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W005-216 AirTop Series AT Mount Bracket Powder Coated Aluminum Use to mount AT2000, AT3500, AT3900, AT5000, or AT5500 Veritcally or Horizontally on Either a Bulkhead or Surface Mount.
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Item #W913-83B 22mm to 24mm stainless steel exhaust clamp. For Webasto or other marine heaters using 22mm to 24mm exhaust.
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Item #W001-434 22mm-24mm-30mm high temperature exhaust insulation (shown with optional stand-offs and clamps).
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Item #W903-94A 24mm Stainless steel flexible exhaust. Sold by the foot up to 20 meters (66 feet). For Webasto or other marine heaters using 24mm exhaust.
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CLA-016 S/S Double Band Hose Clamp Min. 1/2" - Max. 1-1/2" Opening 300 Series Stainless Steel Band and Housing with Extended Band to Protect Clamped Surface with a 300 series Stainless Steel Deep Slotted 5/16" Hex Head Screw
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Item #001-055KIT Combustion Air Intake Silencer for 22mm, 24mm, 1" & 1-1/4" 5 FOOT LONG WITH HOSE CLAMPS Combustion Intake muffler / supply
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Retail Price: $8.64
Our Price: $6.05
You Save: $2.59 (30 %)
Item #PERM-81878 Permatex Ultra Copper. High temperature RTV Sealant for joints in the flexible exhaust systems and for the bedding of exhaust thru hulls.
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1-1/4" Combustion Air Intake Thru Hull
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Item W903-95A 90MM High Temperature Ducting for Marine Forced Air Heaters Sold in 5 or 10 Foot Increments.
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CLA-056 S/S Double Band Hose Clamp Min. 2-1/16" - Max. 3-15/16" Opening 300 Series Stainless Steel Band and Housing with Extended Band to Protect Clamped Surface with a 300 series Stainless Steel Deep Slotted 5/16" Hex Head Screw
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Anderson Brass Kantleak 1/8" Male NPT x 1/8" Female NPT Fuel Valve Male Tapered Pipe to Female Tapered Pipe Brass Fuel Shutoff Valve
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Webasto 9009240B High temperature 90mm duct adapter for use with all 90mm threaded grilles.
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Webasto 9009267B High temperature 90mm duct x 60mm female thread x 90mm duct tee for use with all 60mm threaded grilles.
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Webasto 9012300A High temperature 60mm threaded Black Grille with closable louvers for use with all Marine hot air heating systems.. Use duct adapter 9009239B or duct tee 9009267B or 9009268B to adapt to ducting.
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Webasto 9012288A High temperature 90mm threaded Black Grille with straight louvers for use with all Marine hot air heating systems. Use duct adapter 9009240B to adapt to ducting.
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