Explore top-notch HIU system products that enhance efficiency and save on energy costs. Equip your HIU systems with leading thermostats like Google NEST 3rd-Gen, HIVE, and TADO for precise control and reduced energy use.

Boost your HIU system’s health with ElectroScale2, MagnaClean Micro2, and MagnaClean TwinTech. Protect and clean it with Adey MC1+ Protector and Adey MC5 RapidFlush Cleaner. Also, safeguard your system with Underfloor and Central Heating System Biocide. Opt for the best in HIU system products for standout performance and lasting quality.

Google NEST 3rd-Gen Room Thermostat

The Nest smart thermostat by Google is the most popular on the UK market. It can replace a standard domestic thermostat and be controlled by an app on a digital advice (smartphone, tablet, laptop or computer). Its smart auto-learning features monitor how you use your heating and sync it with your behaviour. It can also form a personalised schedule for your home depending on ideal room temperatures, the insulation in your home and the current weather.

Home-owner benefits

  • Proven energy savings
  • It turns itself down when you’re out
  • Control it from anywhere.
  • Metal, polished finish
  • Install it on the wall or use the Nest Stand (sold separately)
  • High-res colour display
  • Farsight – shows you the time, temperature or weather

HIVE Smart Thermostat

The Hive Active Heating (smart thermostat) from British Gas is another familiar name in the market. Also able to replace a standard household thermostat, it offers another brilliant way to regulate your home’s heating parallel to your daily schedule. Just like Nest, it can be controlled on your digital device via the Hive app.

Home-owner benefits

  • Control from anywhere using Hive app
  • The app gives you control of every aspect of your heating. Turn it up, down, on or off, set schedules and get notifications if you accidentally leave it on when you head out
  • Boost your heating with a tap. If your home isn’t as warm as you want, boost your heating or hot water so you get cosy quickly. You don’t have to worry about turning it off – it does that automatically
  • Wireless, but can be mounted on a stand
  • Location detection will send you a reminder to turn the heating off when you’re out
  • Frost protection activates when the temp drops below 7ºC to prevent pipes from freezing

TADO Smart Thermostat

Control tado° from anywhere using the tado° app on your smartphone. Set personal schedules and receive reports and tips on how you can heat more efficiently to save energy. Get all the information regarding your heating and how much energy you are saving at a glance. You can also find tips on how to easily improve your indoor temperature.

Home-owner benefits

  • Control from anywhere using the tado° app
  • Uses your location to determine when to turn down your heating while you’re away from home, and then turn it back up again as you return
  • Wireless or wired options
  • With the tado° app, you can individually control the temperature in each room, so you’ll save as much energy as possible. Or you can set a schedule that works for you. (this feature requires tado° controlled wireless radiator valve heads installed in rooms controlled by the app)


ElectroScale2 has been designed to prevent limescale build up in homes and commercial properties. If limescale enters the Heat Interface Unit (HIU) it reduces energy efficiency and eventually causes the HIU to fail. With an electrolytic scale reducer, limescale is reduced, protecting the HIU and enabling it to run more efficiently.

Where mains water hardness levels go beyond 200 ppm, Part L of the Building Regulations states that provision must be made to treat the feed water to water heaters and the hot water circuit of combination boilers to reduce the rate of limescale accumulation and the subsequent decline in energy efficiency.

Home-owner benefits

  • Maintenance free
  • Immediate long-term protection for the whole system
  • No running costs and no mains power supply required
  • Maintenance free
  • Part L Building Regulation compliant
  • Approved by WRAS (Water Regulations Approval Scheme)
  • 10-year warranty
  • KIWA approved

MagnaClean Micro2

Compact in design, the MagnaClean Micro2 is a double-action filter that targets the removal of magnetite in smaller central heating systems. MagnaClean Micro2 delivers exceptional protection against the damaging effects of black iron oxide sludge and non-magnetic debris and is ideal for compact installations where space is limited.

Home-owner benefits

  • 6% annual saving on heating bills
  • Immediate ongoing system protection
  • Extended system life
  • Reduced carbon emissions

MagnaClean TwinTech

MagnaClean TwinTech is a powerful dual-action filter that captures magnetic and non-magnetic debris as well as biological films. Specifically designed for use with underfloor heating systems. MagnaClean TwinTech delivers protection against the damaging effects of black iron oxide sludge and non-magnetic debris. The dual combination of the high performance magnetic filter and advanced fine wire gauze eliminates magnetic sludge, non-magnetic debris and biological films, making it ideal for use within underfloor systems.

Home-owner benefits

  • 6% annual saving on heating bills
  • Immediate ongoing protection for HIU
  • Extends the life of the central heating system
  • Reduced carbon emissions

Adey MC1+ Central Heating System Protector

The high-performance MC1+ Protector prevents both system corrosion and limescale deposits. It maintains boiler and system efficiency and prevents the formation of sludge and scale, contributing to a longer system life. Recommended dose rate of MC1+ is 0.4% of system volume – a higher concentration formula than other market products.

  • Best in class formulation for mild steel protection to prevent magnetite generation
  • Every bottle of MC1+ is performance tested
  • Protects against corrosion and scale
  • Increased strength high-performance inhibitor
  • Maintains heating efficiency
  • Helps reduce heating costs and maintenance bills
  • Suitable for use in both commercial heating and closed cooling systems
  • Compatible with all metals
  • Part L Building Regulation compliant
  • Recommended dose rate of MC1+ is 0.4% of system volume – a higher concentration formula than other market products

Adey MC5 RapidFlush System Cleaner

The MC5 RapidFlush System Cleaner is an advanced high-strength cleaner developed specifically to work with Adey’s MagnaCleanse system and remove central heating system sludge, debris and scale. MC5 starts to work as quickly as one hour after application. For maximum flexibility, it can be left in the system for up to seven days.

Home-owner benefits

  • Advanced strength formula
  • Recommended for use with MagnaCleanse and for other mechanically assisted cleaning processes
  • Restores system efficiency
  • Removes system sludge, debris and scale
  • Suitable for all heating systems
  • Part L Building Regulation compliant and compatible with BS7593
  • The MC5 bottle can be dosed into the system through the MagnaClean filter
  • Treats 100 litres which is up to 10 standard radiators

Underfloor and Central Heating System Biocide

MC10+ is a concentrated, dual biocide formulated to prevent the formation and growth of bacterial contamination, algae and micro-organisms in underfloor and central heating systems.

Home-owner benefits

  • High performance dual biocide with two separate active ingredients making it more effective than a single biocide
  • Prevents bacterial contamination and algae
  • Designed for use with underfloor heating
  • Compatible with all Adey MC range products
  • Ensures efficient system operation
  • The MC10+ bottle can be dosed into the system through the MagnaClean filter
  • MC10+ Rapide can be injected into the system via the radiator, air vent or boiler filling loop and can be completed in as little as 20 seconds
  • Treats 125 litres which is up to 15 standard radiators or 100 m2

If you would like to find out more about any of the products and services we offer or get a price, please get in touch by 020 8822 4451, enquiries@adddetail or WhatsApp message. The Add Detail HIU team is ready to help.

Dipesh Jaichand
Easy to book, good comms, fair price and professional service. Recommended.
Daria K
Justin was great, quick to respond and changed thermostat so everything is working now, thank you
Isaac Perez
Excellent service and very professional engineers
Abi Turner
Excellent service. Reliable and value for money. Would definitely recommend.
jane tucker
Having had an estimate from another company who demanded total payment up front by bank transfer, I decide to look at other options for HIU repair. I contacted about 5 companies. Add Detail got back to me very quickly with a much better price and only wanted the cost of parts up front which I could easily pay by credit card. Jason the engineer arrived at the agreed time (he was early in fact) and did an excellent job, making sure that the system was working properly. He was very polite and made no mess. I have recommended this company to others on my development as there are always people having problems with the HIU's.
Erwin De Leon
The service timing was very efficient, engineer that attended my property was accommodating to all my questions. Service value is definitely worth it.
Michel de Baar
The service guy came out within 24 hrs of me calling them, knew to find the solution to the problem and fixed it. He was respectful and friendly, explaining along the way what he observed and gave a few tips on top of it. Thanks! Great service
David Polacek
Great service! Very punctual and professional!
Neli Valkova
Excellent company, very prompt and efficient service. Sorted out problem straight away and price was reasonable. Would highly recommend and will keep using their services. Really impressed.
Sofia Costa
Fantastic service provided by Add Detail! After two terrible experiences with other companies, I discovered Add Detail through a Google search. I messaged them on WhatsApp and received a prompt reply. A few days later, Justin came over and delivered impeccable service. Despite being initially informed that I needed a full HIU replacement, Justin skillfully replaced the malfunctioning pump, leaving everything fully operational! He was incredibly nice and helpful. I plan to rely on Add Detail for all my future HIU servicing needs. I highly recommend them.