Frequenty Asked Questions

Frequenty Asked Questions

How can I be sure that I am buying safely?
Safety comes first at TOPS. 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?
At our contactpage you will find our contact details, including our Chamber of Commerce registration number. TOPS always follows the guidelines for ‘selling remotely’, including the return policy. Curious about the experiences of others? Read over 2.200(!) independent reviews.

How can I pay?
You can pay using various methods, such as iDEAL, credit card, PayPal and Mister Cash. iDEAL is one of the safest ways to pay online. It uses the website of your own bank.

What are the shipping costs?
The standard shipping costs are € 4.95 for The Netherlands and € 6.95 for Belgium. Orders of € 50 or more are shipped for free.

When and how will my order be delivered?
Your order will be delivered within 2 to 5 working days. TOPS WHR Filters 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. TOPS WHR Filters 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 You can also choose to pick up your package at a DPD Parcel Shop in your neighborhood.

What kind of quality can I expect?
Because we use the knowledge, production and purchasing power of TOPS Air Filters, we can offer the highest quality at the best prices. The filter sets of TOPS WHR Filters meet the European EN779 standard. This guarantees a constant quality as advised by producers of WHR 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?
TOPS WHR Filters 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!

What about the cleaning and maintenance of my WHR unit?
TOPS can recommend a local installer / fitter for maintenance and internal cleaning of your WHR unit. For the maintenance of your unit we have contacts with local, qualified fitters. With a maintenance contract, your system will stay in perfect condition thanks to a qualified specialist from your own region. Fill out the form below and discover the possibilities.

How much can I save using a WHR system?
Compared to a ventilation unit with a regular exhaust system, a WHR 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 WHR 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).

If you have any other questions, please do not hesitate to contact us.

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