Monobloc Air Source Heat Pumps
Air Source Heat Pump Suppliers
Alto Energy is an air source heat pump supplier offering full system design, installation, commissioning and long-term technical support. We supply a carefully selected range of systems from Mitsubishi Electric, Worcester Bosch and Samsung, three of the most reliable, well-supported brands in the UK market. Every unit is MCS-eligible and backed by our expert in-house technical team.
Whether you're an installer looking to work under our MCS umbrella scheme, a developer specifying for new build, or a homeowner replacing an existing heating system, we'll specify the right unit for your project and handle the compliance side from start to finish.
Product Range
Air Source Heat Pumps We Supply
Ecodan R32
The industry benchmark for reliability and seasonal efficiency. Quiet operation, proven in thousands of UK installations.
Ecodan R290
The next generation Ecodan running on R290 propane refrigerant — ultra-low GWP and future-ready.
Compress 2000
A full monobloc unit with the widest output range — 4kW to 30kW across single and three-phase. Units can be cascaded up to 180kW.
GEN 6 EHS Mono
Highly efficient and competitively priced. Popular with installers for its ease of commissioning and consistent performance.
GEN 7 EHS Mono
Samsung's latest generation running on R290 propane. Ultra-quiet operation and best-in-class efficiency.
HT Quiet EHS Mono
Engineered for retrofit into properties with existing high-temperature systems. Delivers flow temperatures up to 70°C.
Why Alto Energy
More than a heat pump supplier
We've been supplying and supporting heat pump projects since 2017. Here's what that means in practice:
MCS Certified
Every installation we're involved in is MCS certified. Installers can operate under our Alto Assured Umbrella Scheme without holding their own accreditation. MCS certification is a requirement for schemes like the Boiler Upgrade Scheme.
In-House System Design
Our design team size every system with your property in mind. Correct heat loss calculations, the right product for the project — not just a box off the shelf. We provide design support for installers, developers, and homeowners.
Commissioning On Every Project
Alto commissions every heat pump system supplied through our partner network using our own nationwide team of engineers. This hands-on approach ensures every system is set up to perform exactly as specified, delivering optimal efficiency, lower energy use, and fewer call-backs.
Long-Term Service & Support
Dedicated in-house engineers, warranty plans, and aftersales that doesn't disappear after handover. We also service systems we supply and systems we didn't.
The Process
From Enquiry to Commissioned System
Whether you're an installer, developer, or homeowner — this is what working with Alto looks like.
Get in touch
Tell us about your project — size, property type, existing systems, and any constraints.
System design
Our team run heat loss calculations and specify the right unit, cylinder, and controls.
Supply & install
Product is supplied direct from our warehouse to site. We coordinate delivery and installation.
Commission & certify
We commission the system and register the MCS certificate, enabling Boiler Upgrade Scheme claims where applicable.