--- title: "Multi-Split Air Conditioning Installation Bournemouth & Dorset | Adapt Mechanical" description: "Whole-home and small-office multi-split air conditioning installation across Bournemouth, Poole, Christchurch and Dorset. One outdoor unit, multiple indoor heads, individual room control." lang: en-GB json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "@id": "https://adaptmechanical.co.uk/#organization", "name": "Adapt Mechanical Services", "legalName": "Adapt Mechanical Services Ltd", "url": "https://adaptmechanical.co.uk/", "logo": "https://adaptmechanical.co.uk/__l5e/assets-v1/90b5aa89-6828-4f13-9036-9777fd42e2db/favicon.png", "image": "https://adaptmechanical.co.uk/__l5e/assets-v1/90b5aa89-6828-4f13-9036-9777fd42e2db/favicon.png", "telephone": "+44 1202 144008", "email": "Info@adaptmechanical.co.uk", "areaServed": [ "Bournemouth", "Poole", "Christchurch", "Wimborne", "Ferndown", "Ringwood", "Dorset", "Hampshire", "Salisbury" ], "address": { "@type": "PostalAddress", "streetAddress": "Lower Flat, 7 Windermere Road", "addressLocality": "Bournemouth", "addressRegion": "Dorset", "postalCode": "BH3 7LF", "addressCountry": "GB" }, "sameAs": [ "https://www.facebook.com/61564676105386", "https://www.instagram.com/adapt_mechanical/" ] }, { "@context": "https://schema.org", "@type": "WebSite", "@id": "https://adaptmechanical.co.uk/#website", "name": "Adapt Mechanical Services", "alternateName": "Adapt Mechanical", "url": "https://adaptmechanical.co.uk/", "inLanguage": "en-GB", "publisher": { "@id": "https://adaptmechanical.co.uk/#organization" } }, { "@context": "https://schema.org", "@type": "Service", "serviceType": "Multi-Split Air Conditioning Installation", "name": "Multi-Split System Installation", "areaServed": { "@type": "City", "name": "Bournemouth" }, "provider": { "@type": "LocalBusiness", "name": "Adapt Mechanical Services", "telephone": "01202 144008", "address": { "@type": "PostalAddress", "streetAddress": "Lower Flat, 7 Windermere Road", "addressLocality": "Bournemouth", "addressRegion": "Dorset", "postalCode": "BH3 7LF", "addressCountry": "GB" } }, "description": "Whole-home and small-office multi-split air conditioning installation across Bournemouth, Poole, Christchurch and Dorset. One outdoor unit, multiple indoor heads, individual room control." }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How much does a multi-split system cost installed?", "acceptedAnswer": { "@type": "Answer", "text": "A 3-head domestic multi-split (e.g. 2 bedrooms + lounge) from a reputable brand typically lands between £4,500 and £6,500 fully installed and commissioned. A 4-head system runs £5,500–£8,500. 5+ heads, commercial diversity and concealed pipework are quoted on the specifics." } }, { "@type": "Question", "name": "How long does a multi-split install take?", "acceptedAnswer": { "@type": "Answer", "text": "A 3–4 head domestic multi-split is typically 2 days on site. A 4–6 head commercial is 3–5 days. We dust-sheet the property and tidy at the end of every day, even if we're back the next morning." } }, { "@type": "Question", "name": "Can I add a room later, or do I need to plan for all of it now?", "acceptedAnswer": { "@type": "Answer", "text": "If we know at install time that you'll want to add a future indoor head, we'll spec the outdoor unit one size up and run a capped pipe to the future position — adding the indoor unit later is then a one-day job. Trying to add a head to a system not designed for it usually means upgrading the outdoor unit too." } }, { "@type": "Question", "name": "Will the outdoor unit look ugly?", "acceptedAnswer": { "@type": "Answer", "text": "It's the same size as the outdoor unit for a single 5kW split — just one of them instead of four. We site it at the rear or side of the property, on a wall bracket or ground stand, well away from neighbour-facing windows." } }, { "@type": "Question", "name": "Can rooms be set to different temperatures at the same time?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — that's the whole point of a multi-split. Each indoor head has its own remote, app control and set-point. One room can be cooling at 21°C while another heats at 24°C on most modern systems (though running heating and cooling simultaneously is less efficient than running all heads in the same mode)." } }, { "@type": "Question", "name": "What if one room is much bigger than the others?", "acceptedAnswer": { "@type": "Answer", "text": "We size the indoor head for that room appropriately (a 5kW head in the lounge, 2.5kW heads in the bedrooms), and size the outdoor unit to handle the combined load with diversity. Mixing capacities is normal and exactly what multi-splits are designed for." } }, { "@type": "Question", "name": "Does it use more electricity than separate splits?", "acceptedAnswer": { "@type": "Answer", "text": "Less, typically — one efficient outdoor inverter shared across the load is more efficient than 4 smaller compressors each cycling independently, particularly at part-load conditions where most systems spend most of their life." } }, { "@type": "Question", "name": "Can I control it from my phone?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — WiFi control is standard on every Adapt multi-split install, with all rooms accessible from one app, schedulable individually or as a group, with geofencing and energy reporting." } }, { "@type": "Question", "name": "Do you cover my area?", "acceptedAnswer": { "@type": "Answer", "text": "We're based in Bournemouth and cover Poole, Christchurch, Wimborne, Ferndown, Ringwood, Salisbury and the wider Dorset and Hampshire region. If you're inside the BCP postcodes or within a 30-minute drive of Bournemouth town centre, you're inside our rapid-response patch." } }, { "@type": "Question", "name": "Are you F-Gas registered?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — every Adapt engineer is F-Gas certified to handle, recover and recharge refrigerant. Our F-Gas company registration is held under Adapt Mechanical Services Ltd, Company No. 15463021, and we carry full public liability insurance on every job." } }, { "@type": "Question", "name": "Will I get a written quote?", "acceptedAnswer": { "@type": "Answer", "text": "Always. The site visit is free, the quote is fixed in writing within 24–48 hours, and we don't add surprise extras to the invoice. If something genuinely needs to change once we're on site, we tell you before we start work — never after." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "/" }, { "@type": "ListItem", "position": 2, "name": "Services", "item": "/services" }, { "@type": "ListItem", "position": 3, "name": "Multi-Split System Installation", "item": "https://adaptmechanical.co.uk/services/multi-split-installation" } ] } ] --- Bournemouth, Dorset Mon–Fri 7am–7pm · Sat–Sun 9am–7pm · Rapid Response Across Dorset & Hampshire [Info@adaptmechanical.co.uk](mailto:Info@adaptmechanical.co.uk)[01202 144008](tel:+441202144008) [![Adapt Mechanical Services — design, install, service](/__l5e/assets-v1/9f4b50c1-0efb-49ea-a654-b1d6329b6101/adapt-logo.png)](/) [About](/about) [Services](/services) [Service Areas](/service-areas) [Our Work](/our-work)[Contact](/contact) [01202 144008](tel:+441202144008)[Request Estimate](/contact) Summer Offer — Air conditioning installed from £1,499 [Get your quote →](/contact) 1. [Home](/) 2. [Services](/services) 3. Multi-Split System Installation Multi-Split · Whole-Home · Office # Multi-Split Air Conditioning for Homes & Small Offices Across Dorset & Hampshire One outdoor condenser feeding up to 5 indoor heads with individual room control — the cleanest, quietest way to cool a whole home or small office without a wall of outdoor units. [Get my multi-split quote](/contact) [01202 144008](tel:+441202144008) Rapid response across Dorset & Hampshire · F-Gas registered (Company No. 15463021) · Fixed written quotes · Bournemouth · Poole · Christchurch · Wimborne · Ferndown · Ringwood · Dorset · Hampshire · Salisbury - 17 years' air conditioning experience - F-Gas registered engineers - Rapid response across Dorset & Hampshire - Fixed written quotes - Manufacturer-backed warranties Service overview ## What multi-split system installation actually involves. Plain-English breakdown, so you know exactly what you're paying for, and why it matters before we set foot on site. ### What it is A multi-split system uses one larger outdoor condenser connected to between 2 and 5 (occasionally 6–8) indoor units in different rooms, each individually controlled. Refrigerant is distributed through dedicated pipework to each indoor head, and each room sets its own temperature independently. ### Who it's for Homeowners cooling 3–5 rooms (master bedroom, children's rooms, home office, lounge); small offices with 3–6 separate offices or meeting rooms; clinics, salons and retail with multiple zones; landlords future-proofing larger rentals or HMOs. ### When you need it During a renovation while walls are open, before next summer (booking from January–March avoids the May–August wait), when an existing collection of single splits is reaching end-of-life and replacement makes sense as one project, or when planning permission limits the number of outdoor units you can fit. ### Why it matters Compared to fitting 4 individual splits, a multi-split uses one outdoor unit (instead of four), is significantly quieter for neighbours, is materially cheaper to install across multiple rooms, and gives properly coordinated room-by-room control from a single app or wall controller. The cost of doing nothing ## What goes wrong when this is ignored. Multi-splits are unforgiving of bad installs — one badly run pipe run or an under-sized outdoor unit affects every room on the system. ### Risks of waiting - Outdoor unit under-sized for the total connected indoor load: rooms compete for capacity, none of them ever hits set-point on a hot afternoon. - Pipe runs not pressure-tested in stages before being closed in: a leak found a year later means lifting floorboards or chasing out ceilings. - Refrigerant charge not adjusted for total pipe length across all branches: system runs under-charged, ices, kills the compressor. - Indoor heads mounted in wrong positions for airflow or against bedheads: cold draught, condensation, noise complaint from the partner who wanted air conditioning. - Controls not commissioned properly: rooms turn each other off, schedules don't sync, you regret not paying for the centralised controller. ### Common mistakes - Picking a unit size by adding up room areas — multi-splits have diversity factors that need calculating properly. - Trying to retrofit individual splits as 'a multi-split' by tying outdoor units together — they're different systems, it doesn't work. - Skipping the centralised controller and then realising you can't sync schedules across rooms. - Mixing brand A indoor heads with brand B outdoor unit — not how the manufacturer designed it, voids warranty, often won't even talk to each other. - Booking the install in June and then waiting until September because every multi-split capable installer in Dorset is booked solid for the summer. Our process ## How the job actually runs. Same system every time. No improvising on your floor. 1. 01 ### Whole-property survey We walk every room, take heat-load measurements, photograph indoor positions, plan pipework routes through wall and ceiling voids, and locate the outdoor unit. 2. 02 ### Multi-split design & sizing Total indoor capacity, diversity factor, outdoor unit sizing, pipework branch sizing, controller spec — designed as one system, not 4 separate ones tied together. 3. 03 ### Fixed itemised quote One quote, fully itemised by indoor head, branch, pipework, controls, commissioning and warranty. No 'starting from' pricing. 4. 04 ### Install in 2–3 days typically Day 1: outdoor unit, pipe runs and branches. Day 2: indoor heads, electrical, controls. Day 3: pressure-test, vacuum, commission, hand over. 5. 05 ### Commission & set up app Full F-Gas commissioning per branch, controls programmed, app and WiFi set up, schedules built, warranty registered, first service booked. What you get ## The outcomes that matter. ### One outdoor unit for the whole job Cleaner property exterior, quieter for neighbours, less planning friction than 4 separate outdoor units. ### Individual room control Each room sets its own temperature; one room cooling doesn't force the others to follow. ### Cheaper than 4 separate splits Materially less than installing 4 single-splits — one outdoor unit, one set of electrical, less commissioning labour. ### Centralised app control All rooms controlled from one phone app, with schedules, geofencing and energy reporting. ### Whole-home heating in winter Heat-pump mode across every room — efficient room-by-room heating without running the gas boiler for one cold space. ### 5–7 year warranty on the whole system Single system, single warranty, single service contract — simpler than juggling 4 separate registrations. In depth ## Everything worth knowing before you book. The details a salesperson skips. Skim it, or read every word — both are useful. Questions on this? Talk to a specialist engineer direct. [01202 144008](tel:+441202144008) ### Multi-split sizing — why it's not just adding up the rooms If you've got four rooms each needing 2.5kW of cooling, you do NOT need a 10kW outdoor unit. Multi-splits use a diversity factor — the realistic chance that every room is calling for maximum cooling at the same time. For a typical 4-room domestic multi-split, the diversity factor is usually around 0.75–0.85, so 4 × 2.5kW indoor capacity might pair with a 7.1kW or 8kW outdoor unit. Over-sizing the outdoor unit causes short-cycling and dehumidification problems; under-sizing means every room falls short on the hottest afternoon. This calculation matters and is where most cheap multi-split quotes go wrong. ### Pipework routing and refrigerant branches Each indoor head needs its own pair of insulated refrigerant pipes (liquid and gas line) plus a control cable and a condensate drain, all running back to the outdoor unit via a refrigerant branch. Branches are joined at carefully positioned distribution points (often in loft spaces or service voids) using manufacturer-specific refnet joints. Total pipework length across all branches is calculated, refrigerant charge is adjusted, and the system is pressure-tested in stages before any pipework is closed in. We document every branch length and joint location on a system schematic that lives with the warranty paperwork. ### Brands and pairing rules Daikin, Mitsubishi Electric and Mitsubishi Heavy Industries all make excellent multi-split outdoor units and a wide range of compatible indoor heads. Within a manufacturer, you can mix wall, ceiling cassette, floor console and concealed ducted units on the same outdoor — useful for properties where a wall head suits the bedroom but a ducted unit suits the open-plan living space. You cannot mix brands across indoor and outdoor — the communication protocols are proprietary and the warranty is voided. ### Controls — wall stat, app, central controller, smart home Every indoor head ships with an IR remote as standard. We always specify WiFi controllers for app-based whole-system control. For 4+ head systems we usually recommend a wired wall controller in a central position (hallway, kitchen) as a fallback if WiFi goes down. For higher-end installs we integrate with Apple HomeKit, Google Home or Amazon Alexa, or hard-wire into a Lutron or Crestron home automation system. For commercial multi-splits we wire to a centralised controller or BMS. ### Domestic whole-home vs small-office multi-splits A whole-home multi-split is typically 3–5 indoor heads serving bedrooms, lounge and home office, with the outdoor unit sited at the side or rear of the house. A small-office multi-split is typically 4–6 indoor heads serving separate offices and meeting rooms, with the outdoor unit on a flat roof or external plant area. The hardware is the same; the differences are run-hours (commercial systems usually want a 6-monthly service rather than annual) and the need for a written O&M manual for facilities files. ### Realistic install timelines and lead times Multi-split equipment lead times in the UK run 1–3 weeks for Daikin and Mitsubishi Electric ranges, longer in peak season (May–August). Total project time from accepted quote to commissioned system is usually 3–5 weeks. Install itself is 2–3 days on site for a domestic 3–4 head system, 3–5 days for a 5–6 head commercial. Book early — January through March is the cheapest, quickest time to install for the following summer. Frequently asked ## Honest answers, practical solutions. Can't see your question? Call [01202 144008](tel:+441202144008). How much does a multi-split system cost installed? A 3-head domestic multi-split (e.g. 2 bedrooms + lounge) from a reputable brand typically lands between £4,500 and £6,500 fully installed and commissioned. A 4-head system runs £5,500–£8,500. 5+ heads, commercial diversity and concealed pipework are quoted on the specifics. How long does a multi-split install take? Can I add a room later, or do I need to plan for all of it now? Will the outdoor unit look ugly? Can rooms be set to different temperatures at the same time? What if one room is much bigger than the others? Does it use more electricity than separate splits? Can I control it from my phone? Do you cover my area? Are you F-Gas registered? Will I get a written quote? Ready when you are ## Book your multi-split system installation job today. Written fixed quote. F-Gas registered engineer. No upsell, no pressure. [Get my multi-split quote](/contact) [01202 144008](tel:+441202144008) F-Gas registered Rapid response Dorset & Hampshire Related services ## Other things we look after. [← Back to homepage](/) [ ### Air Conditioning Installation Learn more ](/services/air-conditioning-installation)[ ### Air Conditioning Servicing & Maintenance Learn more ](/services/servicing-and-maintenance)[ ### Split System Installation Learn more ](/services/split-system-installation)[ ### Commercial Air Conditioning Learn more ](/services/commercial-air-conditioning) ![Adapt Mechanical Services](/__l5e/assets-v1/9f4b50c1-0efb-49ea-a654-b1d6329b6101/adapt-logo.png) Specialist air conditioning installation, servicing and repair across Dorset & Hampshire. Based in Bournemouth, covering Poole, Christchurch, Wimborne, Ferndown, Ringwood and Salisbury. Rapid response across Dorset & Hampshire. 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