Fast, reliable commercial air conditioning repairs for your business
When the air conditioning in your workplace stops working, comfort levels drop instantly. Whether it is a stuffy office, a hot restaurant dining room, or a retail store filled with uncomfortable shoppers, a broken system can quickly impact productivity and trade.
At Happy Heat, we know how critical a working climate system is to your daily operations. That is why our friendly, local engineers are on hand to diagnose, fix, and restore your commercial cooling system as quickly as possible.
Where we repair Air Conditioning
NHS and Healthcare
Schools
Offices
Hotels and Hospitality
Places of worship
Shops and retail
Common air conditioning problems we fix
Commercial systems get heavy use throughout the year. If you notice any of these warning signs, our team can help:
Unit blowing warm air
Often caused by low refrigerant levels, blocked filters, or a faulty compressor.
Unusual noises or vibrations
Grinding, rattling, or squeaking sounds usually signal a loose mechanical part or fan belt issue.
Water leakage
Blocked drainage lines or frozen coils can cause water to drip down walls, risking property damage.
Bad odours
Musty smells usually point to built up dirt or bacteria on the internal coils that need thorough cleaning.
System not turning on
Electrical faults, blown fuses, or controller issues can bring the entire unit to a halt.
Why choose us for your air conditioning repairs?
We bring the same honest, high quality service to air conditioning repairs that we do to boiler installations and routine servicing.
Rapid response times
We prioritise commercial repairs so you can get your workspace back to a comfortable temperature without long delays.
Transparent fixed pricing
We diagnose the fault and explain the repair work needed before starting, so you never face surprise costs.
Fully qualified engineers
Our team handles all major commercial brands and models, carrying essential spare parts to fix many issues on the spot.
Want to discuss your project?
Do not let a broken unit disrupt your workday or make your customers uncomfortable. Contact Happy Heat today to book a fast diagnostic visit from our expert repair team.
You really are in safe hands with us!
Picking the right engineers can be a little overwhelming. It can take a lot of trust to let anyone into your private space. This is why we (and hundreds of happy customers) think we are the mutts nuts!
24/7 emergency callouts
Specialist Gas Safe engineers
Specialist Refcom registered AC engineers
Up to 15 year warranty on new boilers
The latest smart technology
100% positive feedback
Hundreds of 5 star reviews
Why businesses trust Happy Heat!
What you get if we become your commercial heating partners:
Gas Safe Registered
We are registered to work on domestic, commercial and industrial premises.
Over a century of experience
As a family business we have over 100 years of combined industry experience.
Fully insured for £5m
We are fully insured for up to £5,000,000 in public liability.
Safe Contractor Accredited
We are SSIP accredited, meaning we meet the highest recognised safety standards for contractors.
DBS Enhanced checked
Our engineers are Enhanced DBS checked and fully vetted, giving you peace of mind when we work at your home or workplace.
100% Positive feedback
We take pride in our positive reputation, proven by our 100% customer satisfaction rating on all major review platforms.
Our full list of commercial services
Commercial Air Conditioning
AC installation
AC repairs and servicing
Commercial HVAC systems
Design, install and commissioning
The latest smart technology
Commercial Heating
Boiler install and replacements
Boiler servicing and repairs
Plant Room installs/refurbishments
Heating system upgrades
Gas pipework and plumbing
Pumps and pressurisation units
Maintenance and compliance
Planned preventative maintenance
Reactive breakdowns
Powerflushing and system cleaning
Commissioning and recommissiong
Mechanical and electrical installs
Water hygiene and treatment
Legionella risk assessments
Water treatment
Chlorination and dechlorination
Water hygiene compliance
TMV servicing and maintenance
Gas and controls
Gas interlock systems
Gas tightness testing and purging
BMS integration
Heating and smart controls
Gas safety inspections (CP15)
Pumps and pressurisation units
Want to talk to the team about a service?
Great, we would love to hear from you! Give the team a call on the number below. We are available to take your call weekdays and on weekends.
0800 246 5457
Don't just take our word for it!
We pride ourselves in our reviews and 100% customer satisfaction. Want to leave us a review? Super, check out our review page!
Got a question about one of our awesome services?
We know choosing a heating expert can be a faff, so we've gathered the most common questions from our Hertfordshire neighbours right here. We believe in honesty and no-nonsense answers.
Get in touch with us
Get a free quote, email us if you have a question or call us on 01923 372823.
Got an emergency? You can contact us on our emergency hotline.
Email us a question
Want to reach out? Fantastic! Email us and we will get respond as soon as we can. The more information you provide the better and quicker we can get back to you!
Get your free quote
By completing our contact form you are agreeing to allow us to contact you via the details that you share. We will not share your details with any third parties. For more information about how we use your data see our Privacy policy.
Got an emergency?
If you've lost heating or hot water, don't worry we are here to help. We operate around the clock, with a dedicated out-of-hours phone line between 8pm and 6am.
While availability can very, we'll always make every effort to attend as quickly as possible when you need us most.
Need a fix fast? WhatsApp us!
Areas we cover
We cover most of London, Hertfordshire and Middlesex. Including: Radlett, Abbots Langley, St Albans, Northwood, Harrow, Uxbridge, Rickmansworth, Chorleywood, Watford and Bushey. We may travel a little bit further, just give us a call!
We love to keep ourselves busy
Check out some of our latest projects on the gram!
Domestic heating services
Domestic cooling services
Commercial cooling services
Company
©2026 Happy Heat All rights reserved. Happy Heat Limited is an Introducer Appointed Representative (Financial Services Register No. 1053623) of Phoenix Financial Consultants Limited (Phoenix). Phoenix is a credit broker, not a lender. Phoenix is authorised and regulated by the Financial Conduct Authority (FRN: 539195), and offers finance from its panel of lenders. All finance subject to status and credit checks.
Registered Address: 269 Park Avenue, Bushey, Hertfordshire, WD23 2DR, United Kingdom. If you have any concerns about our use of your personal information, you can make a complaint to us by writing us at 269 Park Avenue, Bushey Hertfordshire WD23 2DR, calling us on 0800 246 5457 or by sending an email to hello@happyheat.co.uk. You can also complain to the ICO if you are unhappy with how we have used your data. The ICO’s address: Information Commissioner’s Office, Wycliffe House, Water Lane, Wilmslow, Cheshire, SK9 5AF. Helpline number: 0303 123 1113. ICO website: https://www.ico.org.uk.
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