A thermal wheel inside a fresh air unit that captures cooling from outgoing exhaust air to pre-cool incoming outdoor air.
Where you'll find it in the UAE
Inside FAHUs in towers, hotels, hospitals and schools across the UAE. Increasingly specified because pre-cooling 45°C outside air delivers very large energy savings in this climate.
Common faults
Wheel media fouling, which cuts transfer efficiency
Drive belt slipping or breaking, leaving the wheel stationary while the unit appears to run normally
Seal wear allowing cross-leakage between supply and exhaust streams
Bearing failure
Purge sector misadjustment causing exhaust air carryover into supply
What servicing involves
A stopped or fouled wheel is easy to miss because the FAHU keeps running and nothing alarms; the only symptom is a rising electricity bill. Servicing covers media cleaning, belt and drive inspection, seal adjustment, bearing checks and verification that the wheel is actually rotating under all operating modes.
Need this equipment serviced?
Inspection first, fixed written price before any work begins, and a photo report on completion.
It depends on duty and environment, but in the UAE the dust load and near-continuous runtime mean intervals are shorter than manufacturer figures written for temperate climates. We advise based on the actual installation.
Yes. We work on this equipment across residential, commercial and industrial sites, and will tell you honestly if a job falls outside our scope.
Fouled heat-transfer surfaces, degraded seals and control faults account for most call-outs. Dust and humidity accelerate all three in this climate.
Yes. Readings, service reports and certificates are issued on completion, in the format facilities managers and inspectors expect.
Yes. Planned preventive schedules with agreed response times generally cost less than reactive call-outs on equipment of this kind.
Inspection & Quote
Get a Fixed Price
Tell us what you need and we confirm a fixed written price after inspection. No charge to quote.
Privacy Policy
Last updated:
Who we are
HILLS AC Services, Business Park Building 4, 7th Floor, Hadaeq Sheikh Mohammed Bin Rashid, Dubai Hills, Dubai, UAE. Contact: info@hillsacservices.com · +971 58 563 0095.
What we collect
Your name, mobile number and area, when you submit the quote form or message us on WhatsApp.
The service you selected, so we can quote accurately.
Your address, only once you book a job.
Before and after photographs of the work area, taken as part of our service record.
How we use it
Only to respond to your enquiry, quote, schedule and carry out your job, issue your invoice, and follow up about the service. We may contact you about a maintenance reminder for a service you have already used. You can opt out at any time by replying STOP on WhatsApp or emailing us.
What we never do
We do not sell, rent or trade your personal data. We do not share it with third parties for marketing. We do not publish photographs of your property without your written permission.
Who we share it with
Only where necessary to deliver the service: our technicians assigned to your job, and, for water tank work, the independent laboratory that issues your water clearance report. Both are bound to confidentiality.
How long we keep it
Enquiry details are kept for 12 months if you do not book. Job records, invoices and service certificates are kept for 5 years to meet UAE accounting and warranty requirements.
Your rights
Under UAE Federal Decree-Law No. 45 of 2021 on the Protection of Personal Data, you may request a copy of the data we hold on you, ask us to correct it, ask us to delete it, or withdraw consent to being contacted. Email info@hillsacservices.com and we will respond within 30 days.
Security
Enquiries reach us through WhatsApp's encrypted messaging or our email. Job records are held on password-protected devices and accounts. Access is limited to staff who need it.
Children
Our services are contracted by adults. We do not knowingly collect data from anyone under 18.
Changes
If we update this policy we will change the date at the top of this page.
Data Protection Statement
Our commitment
HILLS AC Services enters people's homes and offices. We treat what we see and record there as confidential, and we handle your personal data in line with UAE Federal Decree-Law No. 45 of 2021 (the UAE Personal Data Protection Law).
Lawful basis
We process your data on the basis of your consent (when you contact us) and to perform the contract for the service you have booked.
Data minimisation
We ask for the minimum needed to quote and deliver the job: name, contact number, area, and address at booking. We do not ask for identification documents, financial details or anything unrelated to the service.
Payments
We do not store card details. Card payments are processed by the payment provider or terminal at the point of sale, and we retain only the transaction reference on your invoice.
Photographs
Before and after photographs are taken of ducts, coils, tanks or work areas as a record of the job, and are shared with you. We will not use any photograph of your property in marketing without asking you first and receiving your written agreement.
Breach response
If personal data is lost or exposed, we will investigate immediately, notify affected customers without undue delay, and report to the UAE Data Office where the law requires it.
Prices shown on this website are starting prices. Your final price is fixed in writing after the inspection and does not change on the day, unless you ask us to add work that was not quoted.
Booking & cancellation
Bookings are confirmed by WhatsApp or email. Please give us at least 12 hours' notice to cancel or reschedule so we can reallocate the slot.
Access
Someone over 18 must be present to give access at the start and to sign off at the end. Please make sure ceiling access panels and tank hatches are reachable.
Our workmanship guarantee
If you are not satisfied with a duct or deep cleaning job, tell us within 7 days and we will return and re-clean the affected area at no charge.
Liability
We are insured. We protect floors and furniture before starting. In the unlikely event we damage something, report it within 48 hours and we will repair, replace or compensate fairly. We are not liable for pre-existing faults in ageing AC equipment, ductwork or plumbing that become apparent during service. We will always point these out to you.
Payment
Payment is due on completion unless agreed otherwise in writing. We accept cash, card, bank transfer, Apple Pay, Samsung Pay, Google Pay, Tamara and Tabby.
Governing law
These terms are governed by the laws of the Emirate of Dubai and the United Arab Emirates.
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