Standard filters may be returned within 30 days of delivery. To receive a return at our expense, submit the form first and wait for the ZENAERO return label or instructions.

Giving a reason for the return is optional.

Filters manufactured to measurements or specifications supplied by the customer cannot be returned simply because you changed your mind. Manufacturing defects, damage and errors attributable to ZENAERO can still be reported.

A production tolerance of up to ±1 mm, where stated for the product, is not in itself a defect.

You may submit a request even if the filter has been opened or tested. We will assess its condition after it is returned.

The refund may be reduced in proportion to any loss in value caused by use, dirt, installation, missing parts or damage beyond what is necessary to establish the product’s nature and operation. If the product retains no value, the product refund may be zero to the extent permitted by law.

Photos allow us to identify the product, assess its condition and arrange the correct return. Pack the filter securely, preferably in its original packaging, and protect it from bending, moisture and impacts.

Damage caused by inadequate packaging may reduce the refund. Keep proof that you handed the parcel to the carrier.

If the product is defective, arrived damaged or does not match your order, select this option in the form and attach clear photos of the filter and, where helpful, its packaging. We will explain the applicable solution, including replacement, repair, price reduction or refund in accordance with the law.

An approved refund is issued to the original payment method without undue delay and within the applicable statutory time limits. Where permitted, we may wait until we receive the products or proof that they have been shipped.