How do I size a bilge pump?

Bilge pumps are rated in gallons per hour (GPH), but actual output is lower once you account for hose length and vertical lift. Choose a pump rated well above your expected worst-case water intrusion, and consider a second, higher-capacity pump plus a float switch for automatic operation.

Can I use regular garden hose for my boat’s water system?

No. Marine plumbing uses purpose-built hose rated for the specific system — potable water, sanitation, and raw-water/bilge hoses differ in pressure rating, temperature resistance, and permeation. Using the wrong hose causes odors, leaks, or contamination.

Why is ventilation important on a boat?

Ventilation clears moisture that causes mildew and rot, and — critically on gasoline boats — clears fuel vapors from the engine compartment before starting. Blowers, cowl vents, and dorade boxes keep air moving through cabin and engine spaces for safety and comfort.

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Velair

Velair 21K BTU VSD Smart 115V Marine Air Conditioner Unit Brushless Variable Speed Soft Start Reverse-Cycle Heat

Manufacturer: VelairPart #: 22571WUSKU: 106736

115V

$4893.80Ships when available

Item #: 106736

Category: Air Conditioning

Currently out of stock. This item isn't available to order right now — check back soon or contact us for availability.

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Description

21K BTU VSD Smart 115V Marine Air Conditioner Unit Brushless Variable Speed Soft Start Reverse-Cycle Heat Self-contained VSD air conditioners provide the best existing technology: compressor with brushless DC motor and inverter that constantly controls speed and delivers cooling power (Variable Speed Drive); reverse blade brushless fan; electronic expansion valve. • Constant Flow technology fan (i10 and i16 only)• Twin Rotary compressors• 21.

000 BTU/h max output. The compressor continuously changes its running speed depending on the ambient and set temperatures.

It operates at maximum power to cool the cabins rapidly, but once it reaches the set temperature, it reduces the power and electric consumption. In this way, it maintains the optimal comfort level with the minimum consumption.

The inverter works between 20 and 100 Hz. Self-contained-VSD VELAIR units meet EMC 2004/108/EC directives.

Velair Part Number 22571WU Features: VSD (Variable Speed Drive) eliminates start-up spikes Highest energy efficiency Minimal fan noise and vibration Reverse-cycle for heat pump function Constant temperature output maximizes comfort Cabin control display offers ease of use Smart Control iOS and Android App available to control all AC functions Technical Specifications: Input voltage - 120VAC 50/60Hz Refrigerant type - R410A Heat Pump - Yes Cooling Capacity - 21,000 BTU Maximum Air Flow - 800 m3/h Air Duct Diameter - 6" Sea Water Flow Rate - 5. 3 gpm/20 l/min Dimensions (H x W x D) - 28.

7" x 17. 5" x 12.

7" (73 x 44. 5 x 32.

3 cm) Weight - 88. 2 lbs (40 kg) In the Box: Self-contained AC unit Digital control and 26.

25' (8 M) cable Instruction manual This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.

Specifications

Brand	Velair
Part Number	22571WU
EverTide SKU	106736
UPC	702755002239
Voltage	115 V

Specifications are provided by the manufacturer. Confirm fitment for your application before ordering, or contact us and we'll help.

Compare similar products

	Velair 21K BTU VSD Smart 115V Marine Air Conditioner Unit Brushless Variable Speed Soft Start Reverse-Cycle Heat$4893.80You're viewing	Velair Compact i10VSD SMART Marine Air Conditioner Unit - 230VAC- 10,000 BTU (Generation 2)$6337.70	Velair Compact i16VSD Smart - VSD Inverter Air Conditioning Unit - 230V - 16,000 BTU$6007.68	Velair Compact i16VSD SMART Marine Air Conditioner Unit - 115V - 16,000 BTU (Generation 2)$4639.26
Voltage	115 V	—	230 V	115 V

Complete your setup

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Velair

Velair Compact i16VSD Smart - VSD Inverter Air Conditioning Unit - 230V - 16,000 BTU

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Velair

Velair Compact i16VSD SMART Marine Air Conditioner Unit - 115V - 16,000 BTU (Generation 2)

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Velair

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Returns & warranty

Returns are accepted within 30 dayson items that are unused and in their original packaging. Some items may be subject to a manufacturer restocking fee. Special-order items may not be eligible — if you're unsure, ask us before ordering.

Velair productscarry the manufacturer's standard warranty. For a warranty claim or a return authorization, see our full returns policy or contact us.

Marine Plumbing & Ventilation — frequently asked

How do I size a bilge pump?: Bilge pumps are rated in gallons per hour (GPH), but actual output is lower once you account for hose length and vertical lift. Choose a pump rated well above your expected worst-case water intrusion, and consider a second, higher-capacity pump plus a float switch for automatic operation.
Can I use regular garden hose for my boat’s water system?: No. Marine plumbing uses purpose-built hose rated for the specific system — potable water, sanitation, and raw-water/bilge hoses differ in pressure rating, temperature resistance, and permeation. Using the wrong hose causes odors, leaks, or contamination.
Why is ventilation important on a boat?: Ventilation clears moisture that causes mildew and rot, and — critically on gasoline boats — clears fuel vapors from the engine compartment before starting. Blowers, cowl vents, and dorade boxes keep air moving through cabin and engine spaces for safety and comfort.

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