Air Source Heat Pump Installations & Maintenance in Portsmouth & Hampshire
Energy-efficient, low-carbon and professionally installed heating solutions for homes and businesses. With over 40 years of combined experience, we provide certified ASHP installations, servicing and maintenance to improve performance, reduce running costs and keep your property warm all year round. Fully qualified, MCS registered and trusted across Portsmouth, Gosport, Fareham, Havant, Lee-on-the-Solent and surrounding areas, we ensure every system is fitted safely, efficiently and to the highest industry standards.
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Professional Air Source Heat Pump Installations & Maintenance
Air source heat pumps provide clean, efficient and reliable heating for your home — delivering lower running costs, reduced carbon emissions and consistent warmth throughout the year. When installed and maintained correctly, they offer one of the most energy-efficient heating solutions available in the UK.
At DV Plumbing and Gas, we install, service and maintain air source heat pumps for homeowners, landlords and small businesses across Portsmouth, Gosport, Fareham, Havant, Hayling Island and Lee-on-the-Solent. Whether you’re upgrading from a traditional boiler, switching to renewable energy or improving your property’s heating performance, we ensure your system is fitted safely and operates at maximum efficiency.
With MCS certification, full insurance and over 40 years of combined industry experience, we handle everything from system design and installation to diagnostics, repairs and long-term maintenance.
Whether your heat pump requires expert servicing, a full installation or immediate troubleshooting, we provide a reliable, professional and efficient service every time.
Your home deserves a comfortable, efficient and future-proof heating system — and we’re here to deliver exactly that.
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Complete Air Source Heat Pump Solutions
We handle every aspect of air source heat pump systems — from initial assessments and installation to ongoing maintenance and repairs. Our engineers ensure your heat pump operates efficiently, safely and in line with MCS standards.
Whether you're upgrading your heating system, improving energy efficiency or resolving an existing fault, we provide a comprehensive service tailored to your property.
Full Air Source Heat Pump Services
Our qualified and MCS-registered engineers deliver expert heat pump installations, performance optimisation and long-term system care.
Air Source Heat Pump Installations
We install high-performance air source heat pumps designed to reduce energy bills and increase heating efficiency. We assess your property, recommend the right system size and carry out installations that meet all UK regulations. Every installation includes full commissioning, balancing and performance checks for optimal operation.
Heat Pump Maintenance & Annual Servicing
Regular servicing keeps your heat pump running efficiently and extends its lifespan. We inspect refrigerant levels, electrical components, filters, coils, pumps and controllers, ensuring everything is clean, safe and performing correctly. This reduces running costs and prevents unexpected breakdowns.
Heat Pump Diagnostics & Troubleshooting
If your heat pump isn’t heating properly, running inefficiently or showing error codes, we diagnose the exact issue using professional tools. We check flow rates, pressure levels, sensors, outdoor units, defrost cycles and system performance to identify the root cause and restore efficiency.
Repairs & Component Replacements
We repair common heat pump issues, including refrigerant faults, blocked filters, faulty pumps, sensor failures, wiring issues and performance drops. All repairs are carried out to MCS standards using high-quality components for long-lasting reliability.
System Performance Optimisation
If your heat pump is installing heat but not performing efficiently, we carry out system optimisation. This includes balancing radiators, adjusting flow temperatures, improving insulation, upgrading outdated components and ensuring correct system settings.
Hot Water Cylinder & Heating Integration
Air source heat pumps often work alongside unvented cylinders and modern heating systems. We install, repair and integrate cylinders, radiators and heating circuits to ensure maximum efficiency and consistent heating and hot water output.
Pipework & External Unit Modifications
We replace outdated or incorrectly sized pipework, upgrade outdoor units, improve drainage, repair insulation and ensure the system is set up to perform correctly throughout the year — even in cold weather.
Why Customers Choose DV Plumbing & Gas Services
Our service is built around the three things homeowners value most: experience, reliability and honest workmanship. With over four decades of combined professional expertise, we understand what it takes to deliver safe, accurate and efficient plumbing and heating solutions.
Fast 24/7 Emergency Response
Plumbing problems escalate rapidly, especially leaks and burst pipes. We provide round-the-clock emergency call-outs across Portsmouth and surrounding towns, arriving as fast as possible to stop water damage and restore safety.
Experienced & Fully Qualified
Our team is Gas Safe and MCS registered, fully insured and trained in G3 unvented systems, Water Regulations, Health & Safety and Asbestos awareness. Every job is carried out with care, compliance and a deep understanding of domestic and commercial systems.
Quality Workmanship Guaranteed
From boiler repairs to full heating upgrades, we use proven techniques and quality materials to ensure every installation or repair stands the test of time. We take pride in our work and leave your property exactly as we found it.
Transparent, Honest Pricing
You receive clear, upfront information before any work begins. No hidden fees, no confusing charges — just honest pricing that reflects the quality and reliability of the service provided.
Efficient, Professional & Future-Ready Heat Pump Solutions
Improved Energy Efficiency & Lower Running Costs
Air source heat pumps offer excellent efficiency, but only when properly installed and maintained. We ensure your system is running at peak performance, helping you reduce heating costs and maximise energy savings throughout the year.
Eco-Friendly Heating with Long-Term Benefits
Heat pumps significantly reduce carbon emissions compared to traditional boilers. Our installations follow MCS standards, ensuring your home receives a clean, reliable and environmentally friendly heating solution built for long-term use.
Safe, Compliant & High-Quality Installations
We follow strict MCS guidelines and UK building regulations, ensuring every installation is compliant, safe and professionally commissioned. From electrical safety to refrigerant handling, every detail is completed to industry standards.
Consistent Heating & Quiet Operation
A well-maintained heat pump delivers steady heat output and quiet operation. We service all components — including outdoor units, fans, compressors and coils — to ensure smooth and reliable performance for your home.
How Our Air Source Heat Pump Service Works
1. Property Assessment & System Design
We assess your home’s heating needs and recommend the right heat pump size and setup for optimal efficiency.
2. Clear, Transparent Quote
Before any work starts, you receive a clear, itemised quote with no hidden costs.
3. Professional Installation or Repair
We install, repair or service your heat pump using MCS-approved methods, ensuring safe and efficient operation.
4. Full System Testing & Commissioning
We test all electrical connections, flow rates, temperatures, radiators, cylinders and controls to ensure everything works perfectly.
5. Aftercare Support & Performance Advice
We provide guidance on using your heat pump efficiently, maintaining your system and reducing long-term heating costs.
When Your Heat Pump Needs Major Repairs or Replacement
Some heat pump systems become inefficient due to age, worn components or repeated faults. When repairs are no longer cost-effective, we offer full replacements, upgrades and system redesigns.
We remove outdated units safely, install new high-efficiency models and ensure correct integration with your heating and hot water systems. Whether the issue is refrigerant failure, repeated breakdowns, poor installation from a previous provider or overall inefficiency, we deliver clean, reliable and future-ready installations.
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Areas We Cover for Air Source Heat Pumps
We provide expert air source heat pump installations, servicing and repairs across Portsmouth, Gosport, Fareham, Havant, Hayling Island and Lee-on-the-Solent.
Frequently asked questions
Need Help with Your Air Source Heat Pump?
Based in Portsmouth, we support homeowners and landlords across Hampshire with expert repairs, installations and maintenance for air source heat pumps. Whether your system needs servicing, isn’t heating properly or requires a full upgrade, our team is ready to assist.
Our Key Services Areas
Portsmouth & Surrounding Areas
Portsmouth, Southsea, Cosham, Hilsea, North End, Drayton, Farlington
Gosport, Fareham & Havant
Full support across major local towns and residential areas
Lee-on-Solent & Hayling Island
Reliable service across coastal and surrounding communities
Other Areas
If you’re slightly outside our coverage zone, contact us — we may still be able to help depending on availability.
Expert Air Source Heat Pump Services Across Hampshire
Contact us today for professional installation, servicing and repairs that keep your property warm, efficient and future-ready.