SRVF-350 Solar Roof Exhaust Fan Aluminum Alloy Exhaust Switching Fan Negative Pressure Fan

  Availability: In Stock
  Shipping: Free Airmail 
  Estimated Delivery: 
   Bulk Savings (Buy more save more)
  •   Shipping Methods

    Handling Time

    Before we can ship your order, we prepare your products, do strict quality-control tests and carefully package the items. The time it takes to prepare your items for shipping is separate from the delivery time. It usually takes 1-3 business days to ship out .

    Shipping Methods

    You can choose the preferred shipping method on the cart page during the checkout process. We offers 3 international shipping methods:

    1. Airmail – Free untracked economy shipping via national postal services (HK Post, Singapore Post, China Post, PostNL, Swiss Post, Sweden Post, USPS, Royal Mail e.t.c.)
    2. Airmail Registered – Tracked shipping via national postal services (HK Post, Singapore Post, China Post, PostNL, Swiss Post, Sweden Post, USPS, Royal Mail e.t.c.)
    3. Expedited Shipping – Express shipping with courier delivery (DHL, UPS, FedEx, TNT)

    Delivery Time

    Airmail and Airmail Registered Area Estimated Delivery Time
    United States, Canada 7-25 business days
    Australia, New Zealand, Singapore, United Arab Emirates 10-25 business days
    United Kingdom, France, Spain, Germany, Netherlands, Japan, Belgium, Denmark, Finland, Ireland, Norway, Portugal, Sweden, Switzerland 10-25 business days
    Italy, Brazil, Russia, South Africa 10-45 business days
    Other countries 10-35 business days
    Expedited Shipping 3-10 business days to Worldwide

    Note: If you choose an expedited shipping, please remember to leave a valid contact number, this is required for expedited shipping’s courier delivery.

  •  Returns & Refund

    Last updated October 05, 2022


    If you are not completely satisfied with your purchase for any reason, you may return it to us for a full refund within 15 days from delivery date. All returned items must be in new and unused condition, with all original tags and labels attached.

    Return Process

    To return an item, please email our customer service at to obtain a Return Merchandise Authorization (RMA) number. After receiving a RMA number, place the item securely in its original packaging, and mail your return to the following address:

    Alex NLD
    Attn: Returns
    RMA #
    HaGiborim St 8
    Tiberias, 14388

    Please note, you will be responsible for the return shipping charges. We strongly recommend that you use a trackable method to mail your return.

    All customers should contact us and obtain Return Merchandise Authorization (RMA) number before sending anything to us. We will not be responsible for returned item(s) without notifying us in advance.


    After receiving your return and inspecting the condition of your item, we will process your refund to the credit / debit card or PayPal account which was used to place the original order.

    Please allow at least seven (7) days from the receipt of your item to process your refund. Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your credit card company. We will notify you by email when your refund has been processed.


    If an item is found damaged or defective on receipt, we kindly ask you to contact us within 15 days from the delivery date to arrange a refund or exchange without physical return of the item.

    Please provide us with following:

    1. Photos of the front and back sides of the packaging box;
    2. A photo, video or screenshot of the defective item or the defective part of the parcel.

    Our customer service team will communicate with you to arrange a refund or reshipment without physical return of the item.

    Warranty & Repair service

    If any of the items you have purchased from us is found defective within 1 year from receipt, you are entitled to a repair under warranty. Please kindly provide us with evidence photos or videos of the defective item. After providing such information to our Customer Service team  and the problem is acknowledged, you can send the items back to us for a repair.

    Note:  Please be aware, we do not cover the cost of the returns fees in  warranty & repair service.

    Order Cancellation

    If you want to cancel an order within 24 hours from confirmation of the payment, you will be entitled to a full refund. It is still possible to cancel an order after 24 hours, provided that it has not yet been shipped. If an order has been shipped, it’s impossible for us to cancel or modify it anymore. If you still want a refund, you required to return the item on it’s arrival.


    If you have any questions concerning our return policy, please contact us at:

    +972 054-536-2888



1. Exhaust flow: about 2200-2500 cubic millimeters
2. Motor motor: P: 35/40W, U: 15/18V
3. Noise: within 45dB
4. Scope of application: plant, workshop, container, farm, etc.
5. Material: aluminum alloy
6. Blower diameter: SRVF-320: about 320mm; SRVF-350: about 350mm
7. 35W/40W solar panel size: about 46 x 50cm
8. Product size: about 56.5 x 56.5 x 26cm
9. Weight: SRVF-320: approx. 7.8kg; SRVF-350: approx. 8.4kg

1. Lightning strike protection, rain and cloudy weather and night can use the power adapter to make up for the power, you can also use the remote control (not included) for remote control
2. Aluminum alloy base, corrosion-resistant body light, can be shaped arbitrarily according to the roofing conditions
3. Fluid structure deflector, reduce airflow transformation resistance, improve the export flow structure
4. Automatic temperature control, higher than 25 degrees Celsius to start, lower than 25 degrees Celsius to stop
5. Snap design, stainless steel reinforced screws, welding treatment, strong and safe
6. DC brushless frequency conversion motor, adaptive to changes in light intensity, tracking solar output power point, 5 times higher efficiency, efficient and quiet operation
7. 35/40W solar panel, 3mm high-efficiency monocrystalline silicon, light conversion rate of 25% or more, comes with a high-strength aluminum alloy frame
8. Aluminum alloy heat sink cover, strong heat dissipation, integrated design, waterproof, cold-proof and high temperature resistant
9. Aluminum alloy 5-blade fan, low vibration, low noise, durable, not easy to deformation

Installation steps:
1. Cutting: position and cut a circle on the roof
2. Fixing: fix the aluminum base plate with the roof and make it fit
3. Installation: install the wind turbine body and windproof support bar to fix with the base plate
4. Tighten: adjust the angle of the solar panel, then tighten the screws


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