FAQ
Ordering and shipping
- When and how will my order be delivered?
Your order will be delivered within 2 to 5 working days. KWL-FilterOnline uses DPD Parcel Services for all your packages, a reliable partner specialized in parcel logistics. DPD delivers from Monday to Friday and guarantees that 95% of the parcels is delivered the next working day. KWL-FilterOnline cannot be held accountable for possible delays at DPD. NB: DPD does not deliver to PO Box numbers! - What if my order is delivered when I am not home?
DPD will inform you beforehand when and at what time your package will be delivered. If the proposed time of delivery does not suit you, you can make a new appointment using the website www.DPD.com. You can also choose to pick up your package at a DPD Parcel Shop in your neighborhood. - What are the shipping costs?
The standard shipping costs are € 4.95 for Germany and € 7.95 for Austria. Orders of € 75 or more (Austria € 100 or more) are shipped for free. - How can I be sure that I am buying safely?
Safety comes first at KWL-FilterOnline. That is why our website uses a secured https connection. The lock symbol in the address bar confirms that. - How can I be sure that I will receive the items I ordered?
On this website you will find our contact details, including our Chamber of Commerce registration number. KWL-FilterOnline always follows the guidelines for ‘selling remotely’, including the return policy.
Our assortment
- What kind of quality can I expect?
Because we use the knowledge, production and purchasing power of KWL-FilterOnline, we can offer the highest quality at the best prices. The filter sets of KWL-FilterOnline meet the European EN779 standard. This guarantees a constant quality as advised by producers of MVHR-units. The selected filter cloth has the right density and fire resistance. That way, you can rest assured that you will have the right filter for your system. - How often do I have to replace my air filters?
KWL-FilterOnline advises to replace your filters every six months and in case of newly built houses every four months. Check your filters on a regular basis and, if necessary, you can clean them using a vacuum cleaner on the lowest setting so your filters won't damage. NB: never clean air filters with water or any other liquid!
Reminder Service
- What is our reminder service?
Like all things, after a while air filters start to show signs of wear and they start to work less efficiently. That is why it is important to replace them on time. KWL-FilterOnline offers its existing customers a ‘reminder service’: every six months, you will receive an automatic e-mail reminder to replace your filters. - Why do we provide this free service?
The mail contains the products you have bought before. You can order your new filters with one click of a button, easy and fast. Good to know: the reminder service is completely free of any obligations. You decide when you want to order and how much. The reminder service is in no way a subscription, but rather a free service offered by KWL-FilterOnline.
- Maintenance advice
KWL-FilterOnline advises to replace your filters every six months and in case of newly built houses every four months. Check your filters on a regular basis and, if necessary, you can clean them using a vacuum cleaner on the lowest setting so your filters won't damage. NB: never clean air filters with water or any other liquid!
Usage and replacement
- How do I clean my filters?
Check your filters on a regular basis and, if necessary, you can clean them using a vacuum cleaner on the lowest setting so your filters won't damage. NB: never clean air filters with water or any other liquid!
Energy savings
- How much can I save using a MVHR system?
Compared to a ventilation unit with a regular exhaust system, a MVHR system will save between 300 m3 and 400 m3 of natural gas on a yearly basis. That means - based on a gas price of 0.65 per m3 of natural gas - that you will save between € 195 and € 260. However, a MVHR system does use a bit more electricity, because of the extra supply fan. The additional costs for electricity will be around € 83 (based on a continuously running unit, 50W of extra power, setting 2, over a period of 365 days, standard capacity and electricity costs of € 0.19 per kWh).
Any additional questions? Please feel free to contact us!
