WTW.nl
Maintenance · all brands

Clean filters, quiet unit.

We service all brands and models. Filters, fans, ducts, heat exchanger, all like new again, in one visit.

Filters vervangenInregelenAlle merken
4.5 / 5 on Trustpilot (55 reviews)·Since 2018 ·Maandelijks opzegbaar

Recent · Onderhoudsbeurt Amersfoort

Filters, kanalen, regeling in één bezoek.

Service · Amersfoort
Filter replacementHeat exchanger cleanedFans inspectedCommissioning verifiedVisual duct inspectionEmail report

We service ALL HRV brands

Not just Zehnder or Renson, also Brink, Itho, Vasco, Storkair, Stork, Duco and any other brand. One party for all your ventilation.

1.000+
services per year
All
brands & models
60–90 min
per service
4.5 / 5
on Trustpilot

Prices

Two ways to keep your HRV healthy.

Small maintenance

€ 390

excl. VAT · per visit

  • Check + balance + clean valves
  • Filters chosen separately (€ 32)
  • Original F7/G4, no B-brand
  • Report by email
  • No subscription, no obligation
Schedule small maintenance
Aanbevolen

Maintenance contract

€ 29.50

excl. VAT / month

  • Original F7/G4 filters every 6 months
  • Thorough cleaning every 24 months
  • Priority on call-outs
  • Cancel monthly
  • Saves money vs. ad-hoc visits
Start contract

Large maintenance

€ 545

excl. VAT · per visit

  • Full service visit
  • Filters, fan, heat exchanger
  • Valves and commissioning
  • Duct cleaning (+ € 390 optional)
  • Full report with photos
Schedule large maintenance

Original F7/G4 filters, never B-brand

We use only original factory filters. Keep your system clean, energy-efficient and your warranty valid.

Why maintenance?

A dirty HRV costs you more than you think.

Clogged = loud

Dirty filters force fans to spin harder. Result: noise and higher consumption.

Poor air quality

Saturated filters do nothing. Pollen, fine dust and mould come straight in.

Breaks down sooner

Bearings wear faster in dusty units. A service visit extends lifespan by years.

What is included?

One visit, everything checked.

Filter replacement

F7 filters matching your system, quality filters, no budget brand.

Heat exchanger

Cleaned or rinsed. Crucial for efficiency.

Fans

Checked for wear, bearings, balance, rotation.

Commissioning

Volume measured per valve and adjusted if needed.

Valves

Quanda-effect valve € 23 each if replacement needed.

Email report

What was done, before/after filter photos, advice.

Frequently asked questions

Answers to the most common questions.

How often do I need maintenance?+
Replace filters every 6–12 months (depending on type). Small maintenance every 2 years is ideal. Large maintenance every 4–6 years, depending on condition. More often with intensive use (smokers, pets).
Do you service all brands?+
Yes. While we install Zehnder, Renson and Duco, we service all brands, Brink, Vasco, Itho, Storkair, Stork and more.
What does a single service cost?+
Small maintenance from € 390 excl. VAT (filters separate € 32). Large maintenance € 545 excl. VAT all-in.
Is a maintenance contract required?+
No. But it saves money annually vs. one-off services and gives priority on call-outs. Cancel monthly so no risk.
Which filters do you use?+
Only original F7/G4 filters (fine + coarse dust), factory-equivalent, never B-brand. Keeps your warranty valid and your system energy-efficient.
How long does a service take?+
Average 60–90 minutes for a home. 2–3 hours for commercial or larger installations. We plan a time slot, not a vague half-day.

Schedule your maintenance visit.

Reply within 24 hours. Fixed price, no surprises.

Reply within 24 hours. No obligation, no pushy sales.
1. Your details
Estimated total
€ 390,-excl. VAT
Final after a short intake. We call within 1 business day.

We only call to discuss your request. No newsletters, no spam.

Prefer to call?

085 060 22 97WhatsApp

Official dealer Zehnder · Renson · Duco·First in NL with ComfoClime-certificate

Trustpilot 4.5/5 (55 reviews) · Google 5.0/5 (5 reviews) · 800+ installations · Since 2018