07868 255993gary@linehanelectrical.com Mon–Fri 8–6 · Sat 9–12:30 · Phone line 24 hours AboutServices Electrical - All Types of Electrical Work - Domestic Electrical Work - Commercial Electrical Work - LV Panel Board Installation Installations & Repairs - Consumer Unit (Fuseboard) Upgrades - Full and Partial Rewires - Lighting Installation - Outdoor Lighting - EV Charger Installation - Fault Finding and Electrical Repairs Testing - EICRs (Electrical Installation Condition Reports) Mechanical Air Con Service Areas HertfordshireAll of HertfordshirePopular areas include - Stevenage - Hitchin - Letchworth Garden City - Baldock - Knebworth - Welwyn Garden City - Hertford - St Albans - Royston BedfordshireAll of BedfordshirePopular areas include - Luton CambridgeshireAll of CambridgeshirePopular areas include - St Neots LondonAll London boroughs Not listed? We cover the whole of each county. Call 07868 255993. Our WorkReviewsContact07868 255993Free Quote - Home - Services - Air ConAir Conditioning # Air Conditioning Installationin Stevenage & Hertfordshire Air conditioning installed by F-Gas registered engineers and coordinated alongside your electrical supply, with one free quote covering the whole job and a 12-month guarantee on the workmanship. Get My Free Quote07868 255993 Rated 4.95 out of 5 on TrustATrader · 20 years in the trade 20 years experience 4.95/5 TrustATrader rating 100% recommend on Facebook £10m public liability cover 12 months workmanship guarantee The service ## Air conditioning, coordinated with your electrics Air conditioning is one of the main services offered by Linehan Mechanical & Electrical Ltd, trading as Linehan Electrical, based in Stevenage and run by Gary Linehan, who has 20 years in the trade. Air conditioning installation covers both domestic properties and commercial units across Hertfordshire, Bedfordshire, Cambridgeshire and London. The F-Gas-regulated elements of an air conditioning installation, handling refrigerant, connecting and testing the system, are carried out by F-Gas registered engineers. That means the part of the job requiring specific gas qualifications is handled by properly registered specialists, while the wider project, including the electrical supply the unit needs to run, is coordinated through Linehan. This matters because an air conditioning installation is never purely electrical or purely mechanical. It needs a dedicated circuit, a safely isolated supply, and correctly handled refrigerant, all working together. Coordinating these through one point of contact avoids the gaps that can appear when separate trades are booked independently. The business is an NICEIC Approved Contractor for its electrical work and carries £10m public liability and £10m employers' liability insurance. As with all work, a free quote comes first: photos for simple jobs, a site visit for anything larger. ### Who this is for - Homeowners wanting air conditioning fitted in a bedroom, living space or home office - Businesses needing air conditioning in offices, retail units or warehouses - Landlords improving a property ahead of letting - Anyone replacing an old or failed air conditioning unit - New-build or renovation projects wanting air conditioning designed in from the start Common problems ## Common issues with air conditioning installation Air conditioning installs go wrong more often from poor planning or unregistered work than from the equipment itself. ### Unregistered F-Gas work Handling refrigerant without F-Gas registration is against regulations and risks an unsafe, non-compliant installation. ### Undersized electrical supply An air conditioning unit needs a properly sized, dedicated circuit | running it from an existing overloaded circuit risks tripping and overheating. ### Poor unit positioning Badly positioned indoor or outdoor units reduce efficiency and can be noisier or harder to service. ### Skipping a proper site assessment Room size, insulation and layout all affect what size unit is needed | guessing leads to under- or over-sized systems. ### No clear warranty terms Units installed without clarity on manufacturer warranty terms can leave you unsure what's covered if something fails. ### Common mistakes we see - ×Using an installer who isn't F-Gas registered for the refrigerant work - ×Wiring a unit into an existing circuit without checking capacity - ×Choosing a unit size without a proper room assessment - ×Skipping the site visit on a larger commercial installation - ×Not asking what's covered by a 12-month workmanship guarantee versus the manufacturer's own warranty How we work ## How an air conditioning installation runs - 01 ### Tell us about the space Describe the room or unit and send photos for a simple job. Larger domestic or commercial installations get a free site visit. - 02 ### Assessment and planning Room size, layout and the existing electrical supply are assessed to work out the right unit size and circuit requirements. - 03 ### Electrical supply installed A dedicated, properly sized circuit is installed to BS 7671 wiring regulations to safely power the unit. - 04 ### Unit installed by F-Gas registered engineers The air conditioning unit itself is installed, connected and the refrigerant handled by F-Gas registered engineers. - 05 ### Testing, handover and guarantee The system is tested and the electrical installation certified where required. Workmanship on Linehan's electrical work carries a 12-month guarantee. The air conditioning unit carries its own manufacturer warranty, which varies by product. What you get ## Why coordinate air conditioning through Linehan ### One job, coordinated properly Electrical supply and F-Gas installation are planned together, rather than booked as two separate, uncoordinated jobs. ### F-Gas work done by registered engineers Refrigerant handling is carried out by F-Gas registered engineers, as regulations require. ### Electrics sized correctly A dedicated circuit installed to BS 7671 avoids overloading and nuisance tripping. ### Clear, upfront pricing A free quote covers the whole job, with photos enough for simpler installs. ### NICEIC Approved Contractor The electrical side of the installation is carried out by an NICEIC Approved Contractor. ### 12-month workmanship guarantee Linehan's own workmanship is guaranteed for 12 months, alongside the manufacturer's warranty on the unit. In detail ## What an air conditioning installation involves Air conditioning installation combines electrical, structural and F-Gas-regulated work. Here's the detail across a typical job. ### Electrical requirements Most air conditioning units need a dedicated electrical circuit, correctly sized and protected, rather than being run from an existing socket or circuit. This is installed and tested to BS 7671, the UK wiring regulations, with an isolator fitted near the unit so it can be safely switched off for servicing. On commercial installations with multiple units or larger systems, the electrical supply needs more detailed planning, often alongside wider power distribution on the site. ### F-Gas regulated work Handling refrigerant, connecting pipework between indoor and outdoor units, and commissioning the system are carried out by F-Gas registered engineers, as the regulations require. This is air conditioning installed by F-Gas registered engineers, not a registration held by Linehan itself. No specific brands are promised or fitted as standard. The right unit is specified based on the room and the job, and discussed with you as part of the quote. ### Methods and site assessment A proper installation starts with an assessment of the room or space, size, insulation, sun exposure and layout, to determine the right unit capacity. Positioning of the indoor and outdoor units is planned for efficiency, noise and ease of future servicing. Larger commercial sites may need multiple units or a more complex system, which is why these jobs need a site visit rather than a photo quote. ### Residential versus commercial installations Domestic installations are typically a single room or a small number of rooms, with the main consideration being a correctly sized unit and circuit. Commercial installations, offices, retail units, warehouses, often involve multiple units, larger electrical loads, and more coordination with other trades or ongoing building operations. Both are quoted individually. Air conditioning installation is priced per job rather than against a fixed 'from' price, since unit size, number of units and site access all affect the cost. ### Warranty and aftercare The electrical installation work carries a 12-month workmanship guarantee. The air conditioning unit itself carries the manufacturer's own warranty, which varies by product: as an example, other equipment installed by Linehan, such as Vent-Axia fans, can carry up to a 7-year manufacturer warranty, which shows how much these terms can vary depending on what's fitted. ### Related services - Mechanical in Stevenage - Electrical in Stevenage - Commercial Electrical Work in Stevenage - Installations & Repairs in Stevenage - All electrical & mechanical services ### Areas we cover All of Hertfordshire, Bedfordshire, Cambridgeshire and London, including: - Electrician in Stevenage - Electrician in Hitchin - Electrician in Welwyn Garden City - Electrician in Hertford - Electrician in St Albans - Electrician in London - Linehan Electrical home Questions ## Frequently asked questions ### Is Linehan F-Gas registered? +Air conditioning is installed by F-Gas registered engineers, specialist registered subcontractors, rather than by Linehan holding the F-Gas registration directly. The electrical side of the job is carried out by Linehan's NICEIC Approved Contractor team. ### How much does air conditioning installation cost? +Air conditioning is quoted per job rather than against a fixed 'from' price, since it depends on unit size, number of units and the electrical work needed. Every quote is free. ### Do you offer free quotes for air con? +Yes. Simple installations can often be quoted from photos. Larger or commercial jobs need a free site visit to assess the space and electrical supply. ### How long does an air conditioning installation take? +It depends on the number of units and the scope of the electrical work involved, so timescales are confirmed as part of your quote rather than promised upfront. ### Is the work guaranteed? +Linehan's electrical workmanship is guaranteed for 12 months. The air conditioning unit carries its own manufacturer warranty, which varies by product. ### Can I book air con work out of hours? +The phone line is answered 24 hours a day, so you can call any time to discuss a job or arrange a quote. No specific attendance time is promised. ### Do you fit a specific brand of air conditioning? +No specific brand is promised as standard: the right unit is discussed and specified as part of your quote. ### Which areas do you cover for air conditioning? +Installations are carried out across Stevenage and the wider Hertfordshire area, plus Bedfordshire, Cambridgeshire and London. ### How do I pay? +Payment can be made by whatever method suits you, with terms of 14 days from completion. Larger jobs require a 10% deposit. ### Can you install air conditioning alongside other electrical work? +Yes, air conditioning is often coordinated alongside wider electrical or mechanical works on the same project, managed through one point of contact. ## Get a free air conditioning quote Send a photo of the room or describe your site and get a free, no-obligation quote. Call Gary any time on +44 7868 255993. Get My Free Quote07868 255993 - NICEIC Approved Contractor - 12-month workmanship guarantee - 4.95 on TrustATrader NICEIC Approved Contractor. £10m public and employers' liability insurance. Covering all of Hertfordshire, Bedfordshire, Cambridgeshire and London. ### Services - Electrical - Installations & Repairs - Testing - Mechanical - Air Con ### Hours - Monday – Friday: 8am – 6pm - Saturday: 9am – 12:30pm - Sunday: Closed - Phone line answered 24 hours ### Contact 07868 255993gary@linehanelectrical.comRegistered office: The Loft, Hill End Farm, Langley, Hertfordshire SG4 7PT Company no. 09344264 Facebook © 2026 Linehan Mechanical and Electrical Ltd · Privacy policy · Terms & conditions · Cookie policy Call GaryFree Quote