Knights design, install, service and repair domestic and commercial air conditioning across Hertfordshire, Watford and London. F-Gas certified engineers, clean workmanship and a fast, reliable response you can count on.
We install and service
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Years of experience
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Systems installed & serviced
24/7
Emergency call-out
F-Gas
Certified & compliant
From a single home unit to a full commercial system, our F-Gas certified engineers handle every stage with the same care and precision.
Certification, training and a genuine commitment to doing things properly. It is why homeowners and businesses across Hertfordshire keep coming back to Knights.
Why clients choose us
Registered on the F-Gas certification scheme, so every job meets UK environmental regulations.
Our engineers hold recognised industry skill cards and individual F-Gas qualifications, not just company paperwork.
Trained on the latest high efficiency systems and controls from the leading manufacturers.
A clear health and safety policy and fully compliant working practices on every site we attend.
Years of hands-on experience across domestic and complex commercial projects in Hertfordshire.
Comprehensive cover and documented compliance give you complete peace of mind.
No jargon and no surprises. From first call to long term aftercare, we keep things clear and straightforward.
Call us or request a quote online. We listen to what you need and book a convenient time to talk it through.
We assess your space, recommend the right system and provide a clear, no obligation written quote.
Our engineers install your system cleanly and on schedule, to full F-Gas standards, leaving no mess behind.
We commission, demonstrate and support your system, with planned servicing to keep it running at its best.
A planned maintenance contract keeps your systems efficient, compliant and reliable all year round. Fewer breakdowns, lower running costs and priority cover when you need us most.
We provide planned maintenance for
24/7 emergency cover available for contract clients. 07905 901651
A snapshot of recent installations and contracts across Hertfordshire, from homes to complex commercial systems.
Stevenage, Hertfordshire
Cooling designed in from the start for a loft conversion, keeping a new top floor bedroom comfortable through summer without altering the finished ceiling line.
Stevenage, Hertfordshire
Dedicated ceiling cassette cooling for a server and plant room, sized for continuous duty and installed with resilient controls the client can rely on around the clock.
Hitchin, Hertfordshire
A discreet retrofit into an existing bedroom, positioned for even airflow and installed with zero damage to the freshly decorated finish around it.
We are proud of the relationships we build. Here is what some of our clients have to say.
Based in Stevenage, our engineers work right across Hertfordshire and down into north, north west and central London. Over 50 towns and boroughs covered, with the villages in between as standard.
28 areas in Hertfordshire · 23 areas in London
View every area we coverStraight answers to the things our customers ask most. Cannot find what you need? Get in touch and we will help.
Free, no obligation quotes for homes and businesses across Hertfordshire, Watford and London. Friendly advice from an F-Gas certified team.
