Frequently Asked Questions.

We collected some questions you may have and hope the answer you're looking for is stated here.

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What is a big service?

To be carried out every 24 months by the specialist tradesman: Visual inspection of the system for damage and corrosion Check unit filter and replace ... [read more]

What is a small service?

To be carried out every 3 months by the user: Check the unit filter for dirt and replace if necessary Check room air filter and replace if necessary ... [read more]

How to find the right filter?

You have two possibilities to find the right filter: One possibility is to select the unit in our catalogue. The matching filters are stored. The seco ... [read more]

How can I dispose of my old filters?

You can dispose of the filters in the residual waste bin.

Why should I change my filters regularly?

As the owner of a Zehnder ventilation system, you must have maintenance work carried out regularly, otherwise there is a risk that the system will no ... [read more]

How often do the unit filters need to be changed?

The filters must be inspected every 16 weeks and replaced every 6 months according to Zehnder's recommendation. Cleaning only removes coarse dirt such ... [read more]

Why should I only use original filters?

When replacing dirty filters in a Zehnder ventilation system, you should only use original replacement filters from the manufacturer. Only original fi ... [read more]

How are the filters delivered?

The filters are delivered as a parcel to the delivery address.

What are the shipping costs?

Otherwise we charge a flat rate of € 7.14 (incl. German VAT).

My delivery has not arrived, what should I do?

If you have not received your delivery after more than 10 working days, please contact use the contact link at the bottom of this page. Please use the ... [read more]

How long does the delivery take?

Usually, a delivery takes two to three working days from order.

How to log in

Please click on "Login" at the top of the screen and enter your email-address and password.

How can I register?

Please click on "Login" at the top of the screen, choose "Sign up" and follow the instructions.

I have forgotten my access data

If you have forgotten your password, click on login at the top of the page and choose "Forgot Password". You can enter your email that you entered dur ... [read more]

Where can I find my invoice?

You will receive an order confirmation via email.

Is payment secure?

Yes, the data transfer of your payments and personal details is encrypted with 1024 bit and insured by our payment processor Deutsche Card Services Gm ... [read more]

I have received a defective filter

Please create a support request: Support

I have received a wrong filter

Please create a support request: Support