DC Fan / Blower
12 V DC blower fans for boat engine compartment and caravan ventilation: models with 75 mm hose connection, inline duct, and flanged options.
Products (2)
- Seaflo SFBB1-130-01 Marine Centrifugal Blower Fan, 12 V, 75 mm, 130 CFM – $44.86
- Seaflo SFIB1-145-03 Marine Duct-Type In-Line Blower, 12V, 75 mm, 145 CFM – $20.83
Brands: Seaflo
What does a boat blower do?
Boat blowers are 12 V DC fans that ventilate closed spaces such as engine compartments and bilges by expelling hot air, moisture, and fuel vapor that accumulate there. On boats with petrol engines, running the blower for a period before starting the engine to purge fuel vapor is an important safety practice. In caravans, blowers can also be used to ventilate confined spaces and cabinets.
Category contents
- Flanged blowers: Models mounted to a bulkhead or surface via a flange.
- Inline duct blowers: Models inserted into a ventilation hose run.
- 75 mm hose connection: Connection size compatible with common boat ventilation hoses.
Selection criteria
The blower voltage must match the boat's electrical system (12 V). The volume of the engine compartment determines the required air flow rate; larger compartments may require more than one blower or a higher-capacity model. For blowers to be used in petrol engine compartments, the product information should be checked to confirm that the blower is suitable for this application, i.e., spark-protected. The hose connection diameter must be compatible with the existing ventilation hoses.
Installation recommendations
The blower should be positioned so that its intake is close to the lower part of the compartment; fuel vapor is heavier than air and collects in lower areas. The air outlet should be directed away from the exhaust and fuel filler. Electrical connections should be made using marine-grade cable, a suitable fuse, and a switch. Hoses should be routed avoiding sharp bends.
Maintenance
The blower's intake and hoses should be inspected regularly and cleared of any dust and dirt build-up. In saltwater environments, corrosion may form at electrical terminals, so connections should be checked periodically. At the start of each season, the blower should be tested to confirm it is working.
Frequently asked questions
Why should the blower be run before starting the engine?
To purge any fuel vapor that may have accumulated in the compartment on boats with petrol engines.
Can a blower run continuously?
Operating life varies by model; refer to the product information.
Does a 75 mm hose fit every blower?
It is compatible with models that have the same connection diameter.
Can a blower be used for caravan ventilation?
It can be used to ventilate confined spaces in caravans with 12 V systems.
What should I do if the blower is making noise?
Check the mounting screws and the cleanliness of the blades.
What other boat equipment is available besides engine compartment products?
For booster pumps, bilge pumps, and other products, see the caravan and boat category.