HVAC & Energy-Efficient Upgrades in London
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At Bigness Group, we design, install, and maintain HVAC and energy-efficient systems that keep London properties comfortable, compliant, and low-carbon.
Our engineers combine advanced heating, ventilation, and cooling technology with smart energy management to reduce waste and improve performance.
Whether you’re upgrading an outdated boiler, installing air-source heat pumps, or adding ventilation to meet new building standards, we deliver sustainable systems that cut bills and carbon — without compromising comfort or reliability.
Our HVAC & Energy-Efficiency Services in London
We provide complete heating, cooling, and ventilation solutions for homes, offices, and multi-unit developments.
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Heating System Upgrades – Gas, electric, and renewable boilers, radiators, and underfloor heating designed for maximum efficiency.
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Air Conditioning & Cooling – Split systems, VRV/VRF installations, and maintenance for stable indoor climates year-round.
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Ventilation & Air Quality – Mechanical ventilation with heat recovery (MVHR) to ensure clean, filtered air and balanced humidity.
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Heat Pumps & Renewable Energy Systems – Air-source, ground-source, and hybrid units that reduce dependence on fossil fuels.
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Smart Controls & Energy Monitoring – Intelligent thermostats and IoT sensors that optimise temperature and consumption.
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Maintenance & Servicing – Regular system checks to ensure reliability, safety, and peak performance.
Every project aligns with Part L Building Regulations and modern energy-efficiency standards.
Our Process
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Consultation & Site Survey – We analyse your building’s heating and cooling profile to identify cost-saving opportunities.
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Design & Specification – Our engineers produce detailed plans and system layouts, choosing the right technology for your needs.
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Installation & Commissioning – Qualified specialists install and test all equipment to manufacturer and regulatory standards.
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Performance Verification – We monitor system efficiency, airflow, and control calibration before handover.
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Maintenance & Aftercare – Tailored service packages keep your system running efficiently all year long.
This process ensures predictable results — lower costs, better comfort, and full compliance.
Why Choose Bigness Group
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Certified HVAC and M&E specialists with years of London experience
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Integration of renewable and smart-control technologies
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Transparent pricing and detailed reporting
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Commitment to sustainability and reduced carbon footprint
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24-hour response for critical system failures
We combine engineering precision with sustainability goals to deliver measurable results and long-term value.
Frequently Asked Questions
Q: Do you install both domestic and commercial HVAC systems?
Yes. We handle everything from single flats to large offices and apartment complexes.
Q: Can you replace my old boiler with a heat pump?
Absolutely. We assess suitability, manage permits, and install air-source or hybrid heat pumps for maximum savings.
Q: Do you offer maintenance contracts?
Yes — flexible servicing plans ensure reliability and keep energy costs low.
Q: Are your engineers certified?
All technicians are Gas Safe, F-Gas, or RECC certified and follow UK safety regulations.
Q: Can smart controls really reduce energy use?
Yes. Smart thermostats and zoned control systems can cut energy consumption by up to 25%.
Our Latest HVAC Projects in London
Explore recent heating and cooling upgrades, from office HVAC installations to domestic renewable-energy retrofits.
Each project demonstrates our expertise in balancing performance, efficiency, and design integration — ensuring lasting comfort and lower emissions.
HVAC & Energy-Efficient Upgrades in London by Borough
Bigness Group provides HVAC services throughout London — from Westminster and Camden to Croydon and Richmond. Our borough-based engineers ensure fast response, local expertise, and familiarity with planning and energy-compliance requirements. We support homeowners, landlords, and developers in meeting sustainability targets while improving comfort and reducing running costs.
Barking and Dagenham / Barnet / Bexley / Brent / Bromley / Camden / Croydon / Ealing / Enfield / Greenwich / Hackney / Hammersmith and Fulham / Haringey / Harrow / Havering / Hillingdon / Hounslow / Islington / Kensington and Chelsea / Kingston upon Thames / Lambeth / Lewisham / Merton / Newham / Redbridge / Richmond upon Thames / Southwark / Sutton / Tower Hamlets / Waltham Forest / Wandsworth / Westminster
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