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Air Conditioning Units

Air conditioning technology has come a long way. Gone are the days of bulky, noisy, and energy-draining machines. Today’s air conditioning units are sleek, efficient, and whisper-quiet. Whether you're looking to cool a single bedroom or an entire commercial space, modern systems offer powerful performance with minimal energy use. If your current AC unit is outdated or you're installing a new system, now is the perfect time to explore your options. At K2 Heating & Cooling Solutions, we help homeowners and businesses across the Northwest upgrade to smarter, more efficient air conditioning solutions built for comfort and cost savings.


Testing an air con unit
Testing an air con unit

Benefits of Advanced Air Conditioning Units

Today’s air conditioning units offer more than just cool air, they enhance comfort, energy efficiency, and indoor air quality. Whether for homes or commercial spaces, today’s systems are quieter, smarter, and more cost-effective, which makes them a valuable investment for year-round climate control and improved well-being.

  1. Efficient Heating & Cooling in One: Modern air conditioning units do more than just beat the heat. Thanks to Variable Refrigerant Flow (VRF) technology, they can also provide reliable heating, converting ambient air into warm comfort when needed. In simple words, different areas or rooms can be cooled or heated independently. They work as both heating and air conditioning units, which are a smarter, more cost-effective alternative to traditional boilers. For example, Conservatories can easily become too hot in the summer and too cold in the winter. Latest residential air conditioning units provide precise temperature control all year round, making these beautiful spaces usable and comfortable, regardless of the season.
  2. Energy Efficiency & Cost Savings: Advanced air conditioning units utilise cutting-edge technology, such as inverters and smart thermostats, to consume less power, thereby lowering energy bills. For businesses like factories, shops, and warehouses, upgrading outdated systems can also reduce overheads and free up valuable space.
  3. Enhanced Air Quality: Built-in filters help remove dust, allergens, and airborne pollutants, making the air cleaner and healthier, especially beneficial for allergy and asthma sufferers.
  4. Quiet Operation: Nowadays, air conditioning units for homes and offices are designed to run quietly in the background, which ensures peaceful living and working environments. They're also ideal for student bedrooms or study areas, helping create a calm, focused atmosphere for longer periods of concentration.
  5. Eco-Friendly Performance: Smart AC units use less energy. They produce fewer emissions and help reduce your carbon footprint. It's a smarter and more sustainable choice for any home or business.
  6. Flexible Installation Options: Choose from a different types of commercial and residential air conditioning units, including split systems, ceiling cassette units, ducted units, VRV/VRF systems, and wall air conditioning units. All these AC units are tailored to meet your specific needs and space requirements.
  7. Reduced Maintenance Requirements: Newer systems are designed to be low-maintenance, with self-cleaning filters, auto-diagnostics, and system alerts that help prevent issues before they escalate. This reduces the cost and hassle of upkeep over time.

What to consider when choosing a new Air Conditioning Unit

Every air conditioning project is unique, and selecting the right unit depends on your specific space, budget, and usage needs. At K2 Heating and Cooling Solutions Ltd, we’re here to guide you every step of the way. Here are some key factors to keep in mind:

BTU Rating (Cooling Capacity)

BTU stands for British Thermal Unit, which tells you about the cooling capacity of your residential or commercial air conditioning unit. A higher BTU means the AC unit can cool a larger area efficiently, but it will definitely result in higher electricity bills.

  • Up to 150 sq ft (Tiny rooms or box rooms): Look for units with 5,000–6,000 BTUs. Anything more is excessive and leads to unnecessary electricity usage.
  • 150–250 sq ft (Average bedrooms): You'll need around 7,000–8,000 BTUs. This ensures a consistent, comfortable temperature, perfect for most UK bedrooms.
  • 250–350 sq ft (Living rooms or larger spaces): Opt for 9,000–10,000 BTUs to experience a noticeable difference. Ideal for lounges and family rooms.
  • 400+ sq ft (Large open-plan areas): You’ll need a minimum of 12,000 BTUs to effectively cool the space without overworking the unit.

Pro tip by K2 experts: Divide the BTU figure by 1,000 to estimate running cost in pence per hour—e.g., a 10,000 BTU unit uses around 10p/hour.


Modern home air conditioning unit
Modern home air conditioning unit

Size and Placement

Choose a unit that fits the physical area without compromising airflow or aesthetics. Modern split or wall-mounted units are compact, while ceiling cassettes or ducted systems may be better for open or commercial spaces.

Energy Efficiency (SEER & SCOP Ratings)

Look for high SEER ratings—ideally 7.0 or higher for UK homes, with A++ or A+++ energy labels according to EU and UK ErP standards. For heating performance, a SCOP rating of 4.0 or higher is recommended.

You could be saving a lot more than you think. For instance, switching from a SEER 10 unit to a SEER 16 model can slash your cooling bills by up to 40%. While high-efficiency systems might cost more upfront, they tend to pay for themselves over time through significantly lower energy bills. It's an investment that keeps giving back, season after season.

Smart Features & Inverter Technology

Units with inverter compressors and smart thermostats adjust power dynamically, cutting energy use by up to ~40% and providing smoother temperature control.

Noise Levels

Advances in design mean many air conditioning units for the homes and offices now operate under 50 dB. This results in better sleep in bedrooms and higher productivity in offices.

UK Regulations & Installation Standards

All fixed AC installations must be carried out by an F-Gas certified engineer, in accordance with DEFRA and TM44 requirements. Systems over 12 kW must undergo an energy inspection every five years .

Choosing the right combination of capacity, energy rating, and installation quality ensures your air conditioning unit delivers optimal comfort, lower bills, and long-term reliability, without wasting energy or compromising on performance.


Installing commercial air conditioning
Installing commercial air conditioning

Top UK AC Picks for 2025

If you are planning to install an air conditioning unit but don’t know which one is best, then here are some top picks for 2025 air conditioning units in the UK.

  • Worcester Bosch Climate 3000i (SEER 7.4, A++) - Trusted British brand now doing cooling—reliable, efficient, and built to last.
  • Mitsubishi Electric Zen (SEER 7.2, A++) - This Mitsubishi air conditioning unit is ultra-quiet and compact, perfect for smaller, modern spaces.
  • Daikin Stylish (SEER 8.0, A+++) - Smart, sleek, and super-efficient. Control it from anywhere with Wi-Fi built in.

Why Choose K2 for Air Conditioning Unit Installation?

Choosing the right air conditioning unit is only part of the equation—choosing the right partner to install and support it is what ensures lasting comfort and performance. At K2, we deliver reliable, expertly installed air conditioning units tailored to your space, needs, and budget.

Here’s why K2 is the trusted choice across the North West:

  • Full-Service Design & Specification: We don’t just sell units, we assess your space, comprehend your needs, and design the most efficient system possible, whether off-plan or on-site.
  • Expert Installation by Accredited Engineers: Our F-Gas-certified engineers install your system quickly and precisely, ensuring smooth integration and long-term performance.
  • Premium-Grade Units: We work with top brands like Daikin and Mitsubishi, known for energy efficiency, advanced features, and proven reliability.
  • 7-Year Warranty: As a Daikin D1+ Premium Partner, we offer extended 7-year warranties on all parts and labour—something few others can match.
  • Ongoing Maintenance & Fast Repairs: We offer both preventative care and responsive repairs, with access to genuine parts for a range of systems, from wall-mounted units to ducted and VRF setups.
  • Trusted Local Experts: With decades of experience, an in-house apprenticeship program, and Refcom Elite certification, we’re committed to raising standards in HVAC service across the North West.

At K2, your air conditioning investment is backed by real expertise, local service, and long-term support.
Contact us today for a reliable air conditioning unit installation in the Northwest and across the UK.

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Bolton (Head Office): 116-118 Long Causeway, Farnworth, Bolton, BL4 9BL

Tel: 01204 361171

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Manchester Office: 76 King Street, Manchester, M2 4NH

Tel: 0800 107 5097 |

Tel: 0161 804 4561

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