Call us at 1-800.562.7797 or use our Contact Form  
                                       
Showroom Open 8:00am to 4:30pm M-F PST

USPS International Services are experiencing delays.
International Priority mail is currently taking 4+ weeks. 
 
 
 
 
  • CurrencyUS
    • En
      0 items $0.00
      • Login Logout
      • Account
      • Re Order
      • Quick Buy
      Logged in as:   
       
                                      Call us at 1-800.562.7797 or use our Contact Form  
                                             
      Showroom Open 8:00am to 4:30pm M-F PST

      USPS International Services are experiencing delays.
      International Priority mail is currently taking 4+ weeks. 
       
       
       
      • Welcome
      • Shopping Cart
      • My Account
      • Heat
      • Cool
      • Galley
      • Hardware
      • Electrical
      • Info
      • Shop
        Heat > Webasto Diesel Heaters > Hydronic Heaters > 

        Categories

        Heat
        Webasto Diesel Heaters
        Forced Air Heaters
        Hydronic Heaters
        Basic Heater Kits
        Heating System Installation Equipment
        Webasto Repair Parts
        Deluxe Heater Kits
        Olympia Hydronic Furnaces
        Proheat Diesel Heaters
        REAL Hydronic Air Handlers
        Solid Fuel Heater
        Diesel Stoves and Heaters
        Propane (LPG) Heaters
        King Electric Marine Heaters
        Cool
        Galley
        Hardware
        Electrical
        Info
        Shop

        Webasto Thermo Pro 90 31,000 Btu Hydronic Marine Heater with Surewire



        Webasto Thermo Pro 90 31,000 Btu Hydronic Marine Heater with Surewire


        Quantity Pricing
        SKU: T90PROSW-12

        Price: $4,512.85

        $4,512.85
        Our Price: $4,512.85

        0
        Stock Availability: BUILT AS NEEDED

        Select Options:

         
        Add to Wish List Please, login and add to Wish List.


        Or:

        Go to Wish List

        Thermo Pro 90
        12 Volt Diesel Hydronic Heater
        with Marine Installation Manual, Fuel Pump & Surewire Kit
        Heat Output:31,000 btu
        Fuel Consumption:.24 gal/hr (0.91 l/hr)
        Voltage:12 volt (24 volt available)
        Power Consumption (12v):
                    Full:
                    Start-up (first 30 secs):

        7 amps
        11.5 amps
        Coolant Operating Temperature:
                    Opens at:
                    Closes at:

        168° F (75.6° C)
        150° F (65.6° C)
        Dimensions:L 15" x W 5.16" x H 9.13"
        (381mm x 131mm x 232mm)
        Weight:10.8 lbs (4.9 kg)
        The Thermo Pro 90 hydronic heater offered by Webasto will heat up to a 42 foot sailboat or a 40 foot powerboat.

        With it’s integral circulation pump the Thermo Pro 90 utilizes 3/4” water hose to deliver heated coolant to fan heaters throughout the boat (3 gpm @ 10 ft head).  The Thermo Pro 90 uses a 1-1/2" rigid exhaust system, and a 3/16” fuel system.
        Featuring: Surewire Water:

        The Surewire Water board puts all electrical connections into one place making installation and troubleshooting of your heater easier than ever before. The Surewire Water is for all Webasto Water heaters.

        Features include:

        • Ready for hassle free thermostat wiring (Up to 4 zones!)
        • Domestic water heater control wiring
        • Easy to add engine heat control
        • Hour meter to track run time of the heater
        • Comes with protective cover and backing plate
        • Breaker protection of heater in one convenient place
        • Fuel pump indicator light
        • 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.

                                                   or

        **Click Here For Deluxe Heater Kit Suggested Part Lists & Pricing**

         
         
         

        Warning: cancer and Reproductive Harm -

        https://www.p65warnings.ca.gov/

        These warnings are not an indication that these products are violating any safety standards or regulations.

        However, as our products might be sold in the state of California, we are legally obliged to inform customers about the potential presence of these chemicals in our products.


        • Customers who viewed
          this item also viewed
        • Accesories

        001-010 3/16" Copper Fuel Line

        001-379 1-1/4" Combustion Air Intake Thru Hull

        001-394K

        3/4" Hose Inline Boiler Drain Ball Valve w/3/4" Male Garden Hose Drain

        3/4" (19.1mm) "Boston Bosflex" Commercial Grade Heater Hose

        STA-CLEAN Antifreeze - Propylene Glycol Low Silicate SCA-Precharged

        002-621S

        3/4" Brass Hose Barb x 3/4" Brass Hose Barb Ball Valve

        6712M51 #12 Clamp, Lined, 316SS

        75135K-20

        75135K-20 20 Amp Inline Manual Reset Breaker Kit

        Gasoila AS05 FasSeal-ATS Anaerobic Thread Sealant with PTFE

        B7W10T-20 10/2 AWG (Wht Jacket) 2 Cond Tinned Boat Cable

        B7W16T-20 16/2 AWG (Wht Jacket) 2 Cond Tinned Boat Cable

        B7W16T-30 16/3 AWG (Wht Jacket) 3 Cond Tinned Boat Cable

        Johnson CM30P7-1 3/4" 12 Volt 6.9 GPM Mag Drive Circulation Pump

        1-1/4" Plastic Wound Duct

        Permatex 80019 Form-A-Gasket #3, 4 oz Brush Top Bottle

        PERM-81878 Permatex Ultra Copper

        RL6013

        REAL Heat 6013 5,300 Btu Marine Hydronic Fan Heater

        RL6414

        REAL Heat 6414 19,250 Btu Marine Hydronic Fan Heater

        RL6424

        REAL Heat 6424 19,250 Btu Marine Hydronic Fan Heater

        SC1600L-Black Digital Thermostat

        W001-214 1-1/2" Stainless Steel 316 Series Rigid Exhaust tube

        1-1/2" EXH. INS. PAD 5 FT -BLK

        W001-441B-Muffler 1-1/2" Muffler Exh. Ins. -Blk

        W002-103CV

        W002-103CV Marine 6" Vertical Copper Expansion Tank for Hydronic Syst.

        W002-109

        W002-109 1-1/2" Stainless Horizontal outlet exhaust thru hull

        W002-742 1-1/2

        W002-742 1-1/2" Stainless In-Line Exhaust Muffler

        W002-780 1-1/2" Stainless steel exhaust clamp

        W002-911

        W002-911 Hi/Low Switch With Off for Fan Heater

        W005-111

        W005-111 1-1/2" Stainless short exhaust elbow with condensation drain

        W005-213-KIT

        W005-213-KIT 3/4" Hose Inline Aquastat

        W005-378K

        W005-378K System Heat Switch

        W005-912-KIT

        W005-912-KIT 3/16" S/S Fuel Syphon Tube

        W11BVR

        Gar-Ber W11BVR Diesel Fuel Filter Kit

        • Recently Viewed

        Information

        • About Us
        • Delivery Information
        • Privacy Policy
        • Terms & Conditions

        My Account

        • Overview
        • Order History
        • Re-Order Items
        • Profile

        Get In Touch

        • Call us to ask any questions (800) 562-7797
        • Send us an email Contact Us
        • 5320 28th Avenue NW STE 100, Seattle, Wa 98107, USA

        Social

        Newsletter Sign Up

        © 2025 Sure Marine Service Inc

        Sure Marine Service, Inc.
        5320 28th Ave NW
        Seattle , WA , 98107
        (206)784-9903