Expert Heat Pump Installation,
Repair & Servicing
Across Hampshire
Trusted by homeowners and businesses for over 15 years. Fast diagnosis, reliable repairs, and systems that perform as they should.
Our Services
From installation to emergency repair, we deliver specialist heat pump and air conditioning services you can depend on.
Heat Pump Repair
Fast, accurate fault finding for underperforming or broken heat pump systems. We diagnose and fix the issue — not just the symptoms.
Servicing & Maintenance
Planned servicing to keep your heat pump running at peak efficiency. Reduce breakdowns and extend system life.
Heat Pump Installation
Correctly sized, professionally installed, and commissioned to perform from day one. All major brands.
Domestic Air Conditioning
Professional design and installation of air conditioning for your home. Stay cool in summer with minimal running costs.
Commercial Air Conditioning
Reliable air conditioning for offices, retail, and commercial premises. F-Gas compliant installation and servicing.
Pool Heat Pump Repair
Specialist diagnosis and repair for swimming pool heat pumps. All major brands, titanium heat exchanger expertise.
Pool Heat Pump Servicing
Annual servicing that keeps your pool heat pump efficient and prevents mid-season breakdowns.
Pool Heat Pump Supply
Correctly sized pool heat pumps supplied and installed. Extend your swimming season efficiently.
Commissioning & Optimisation
Fix underperforming systems. We measure actual COP, identify inefficiencies, and deliver measurable improvements.
Emergency Repairs (24/7)
System down? We offer 24/7 emergency callouts to get your heating or cooling back online fast.
System Upgrades & Retrofits
Upgrade emitters, controls, and cylinders to unlock the full efficiency of your existing heat pump.
Smart Thermostat Integration
The right thermostat, correctly configured for your heat pump — not a generic gadget that fights efficiency.
Health Checks & Reports
Independent performance assessment with measured COP data and prioritised recommendations.
F-Gas AC Servicing
F-Gas certified air conditioning servicing with full compliance documentation. REFCOM registered.
Annual Maintenance Contracts
Planned servicing, priority emergency response, and F-Gas compliance — one annual payment, total peace of mind.
Why Hampshire Homeowners
Choose Appian Heat Pumps
We don't just fix heat pumps — we make them perform the way they were designed to. From repairs to system optimisation, here's what sets us apart.
Accurate Diagnosis, Not Guesswork
We identify the root cause of underperformance — so you're not paying for repeat visits or unnecessary parts.
15+ Years of Specialist Experience
Craig Ball started in commercial heating and ventilation, then air conditioning, before specialising exclusively in heat pumps.
Results You Can Measure
Our commissioning and optimisation work delivers measurable improvements in system output and energy efficiency.
One Call, One Engineer, One Fix
No call centres, no middlemen. You speak directly to the person who will diagnose and fix your system.
What Our Customers Say
Real feedback from homeowners and businesses across Hampshire.
Recent Work
A selection of heat pump installations, air conditioning projects, and specialist repairs from across Hampshire.
Current Offers
Take advantage of these offers — designed to reward loyal customers and deliver more value. View all offers.
Free Heat Pump Health Check
Book any heat pump service and receive a complimentary system health check — we'll assess performance, efficiency and flag any potential issues before they become costly.
Book a Service →Annual Maintenance Contract
Lock in your annual servicing rate and get priority emergency response. Peace of mind that your system is maintained by a specialist, year-round. Learn more.
Enquire Now →Refer a Neighbour — Save £50
Recommend us to a friend or neighbour. When they book, you both receive £50 off your next service. Quality work speaks for itself.
Learn More →Frequently Asked Questions
Quick answers to the questions we hear most often.
Ready to Get Your Heat Pump
Working Properly?
Whether it's a repair, service, or new installation — get in touch for a no-obligation estimate. Most enquiries are responded to within 2 hours.
07481 552059Available 24/7 for emergencies
"Craig was brilliant — diagnosed the fault in under an hour when two other companies couldn't work it out."
— Sarah T., Basingstoke
Read all customer reviews →Request a Free Estimate
Fill in the form — we'll get back to you within 2 hours.