Most requested
Commercial installation
Split, multi-split & VRF systems designed and installed for offices, retail and hospitality.
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Design, installation, service and repair for offices, retail, restaurants and industrial spaces — delivered by fully qualified, F-Gas certified engineers.
From single split systems to full VRF networks — Abacus designs, installs and maintains air conditioning that keeps London working, comfortably.
From hot to cold and everything between — Abacus designs, installs and maintains commercial AC that just works, all year round.
Whether you're fitting out a new space, keeping an existing system running, or improving air quality — our engineers handle every stage.
Split, multi-split & VRF systems designed and installed for offices, retail and hospitality.
Explore commercial
Discreet wall-mounted and ducted heat-pump systems for homes, studios and home offices.
Get a home quote
Planned preventative maintenance and rapid breakdown response to keep you running.
Arrange a service
Fresh-air ventilation combined with AC for total climate control and energy savings.
Discuss ventilationWe design around how you actually work — balancing comfort, running cost and future flexibility.
Inverter-driven compressors that sip power and slash running costs.
Carefully specified indoor units that disappear into the background.
VRF · Cassette · in situ
Zone-by-zone scheduling and app control for total comfort.
Manufacturer-backed warranties protected by our maintenance plans.
We've spent three decades building a reputation on punctuality, clean installs and honest advice — not the hard sell.
F-Gas registered, REFCOM & SafeContractor accredited engineers on every job.
Mitsubishi, Daikin, Samsung, Fujitsu, Toshiba & Midea — we specify what's right, not what's easy.
A clear, fixed quote and a breakdown of costs before any work begins — no surprises.
Right-sized systems and heat-reclaim options that cut running costs year after year.
From a single boutique to a multi-floor HQ, we scale the system to the space.
VRF & cassette systems
Comfort cooling & kitchens
Quiet, even temperatures
Process & precision cooling
"Price competitive, extremely punctual and professional throughout. The team worked around our trading hours and left the site spotless."
"Abacus surveyed, quoted and installed a five-unit VRF system across our offices without a single hitch. Genuinely first-class engineers."
"Our restaurant AC failed mid-summer and Abacus had us back up the same day. Reliable, fairly priced and a pleasure to deal with."
From first call to aftercare, you'll always know exactly what happens next.
Tell us what you need by phone or form.
A free, no-obligation on-site visit.
A clear, itemised fixed price.
We schedule around your hours.
Clean, certified, fully commissioned.
Optional planned maintenance plans.
Based in Ware, Hertfordshire, we cover Greater London and the surrounding counties for installation, maintenance and emergency call-outs.
Book your free, no-obligation site survey today and get a clear fixed quote from a contractor London businesses trust.
Unit 21, The Maltings, Roydon Rd,
Stanstead Abbotts, Ware, SG12 8HG
Mon–Fri 7am–6pm · Sat–Sun 9am–5pm