Your reliable and knowledgeable heat interface unit expert

Speak to our professional heating team on 0208 8797372

At Happy Dog Plumbing & Heating, we specialise in heat interface unit (HIU) installation and servicing, providing efficient district heating solutions across London. Our expert engineers ensure seamless temperature control and optimal performance, helping homeowners, landlords, and businesses manage central heating with ease.

HIUs efficiently transfer thermal energy from a renewable energy or heat pump source to individual properties, making them a sustainable alternative for multi-dwelling buildings. Our team focuses on key components like heat exchangers, control valves, and pressure management, ensuring reliability and longevity.

Whether you need a new HIU installation, routine maintenance, or emergency repair, our NAPIT-approved specialists deliver high-quality, low-carbon solutions to improve indoor air quality and heating efficiency. For expert heat interface unit services, contact Happy Dog Plumbing & Heating today at 0208 8797372.

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Arrange a visit from one of our heating engineers

Are you in need of an expert to deal with the issues related to your heat interface units? Contact us by phone on 0208 8797372 or email to hello@happydogplumbing.london or fill out this form. We will help you with expert installation, maintenance, and support for Heat Interface Units (HIUs). Our experienced team will guarantee the optimum functioning of your HIUs.

Your trusted Heat Interface Unit specialists

At Happy Dog Plumbing & Heating, we are fully qualified Gas Safe registered engineers with a proven track record in heat interface unit (HIU) installation and servicing. Our expertise in district heating and central heating solutions has earned us a strong reputation, backed by numerous positive reviews from satisfied customers. See for yourself what makes us a trusted choice for HIU services in London.

What are the common types of heat interface units?

In the UK market, Heat Interface Units (HIUs) are primarily used in district heating and communal heating systems, transferring heat from a centralised energy source to individual properties. The most common types of HIUs include:

Indirect heat interface units

These features a plate heat exchanger that separates the primary network from the building’s heating and hot water system. They provide pressure independence, ensuring stable temperature control and heat exchanger protection. These are ideal for high-rise buildings and developments with district heating.

Direct heat interface units

Direct HIUs directly connect the district heating network to the property’s central heating and hot water system. It eliminates the need for a heat exchanger, making it more cost-effective and efficient. It’s suitable for low-rise buildings with consistent pressure and flow rates.

Single-plate HIUs

They make use of one heat exchanger to supply hot water to the domestic system while allowing the heating circuit to be directly connected. It provides fast-response hot water but requires careful pressure management. These are commonly used in low-rise apartments and buildings with well-regulated heating networks.

Twin-plate HIUs

Equipped with two separate heat exchangers—one for domestic hot water and another for space heating. These units ensure hydraulic separation, offering better pressure and temperature control. These are ideal for developments with multiple users requiring independent control over their heating.

Smart HIUs

Smart HIUs have advanced digital controls, remote monitoring, and self-regulating flow for energy efficiency. They help reduce carbon footprint by optimising heat demand. These are best suited for modern district heating systems with a focus on sustainability.

Partnering with Maintracts for expert HIU solutions

We’ve joined hands with Maintracts Services to deliver efficient and reliable solutions for your heating needs. Our combined expertise ensures a swift response from a skilled underfloor heating engineer, providing top-quality service with a commitment to excellence.

Key benefits of using Heat Interface Units (HIUs)

Enhanced safety & reduced gas pipework

Traditional communal gas heating systems require individual gas supplies for each flat, increasing the risk of gas leaks and high-maintenance pipework. HIUs eliminate the need for gas-filled pipe networks, improving safety and reducing maintenance costs in multi-dwelling buildings.

Improved energy efficiency

HIUs optimise heat distribution, ensuring that heat from a centralised source is used effectively within individual properties. They also allow for customised heating control, leading to reduced energy waste and lower bills compared to traditional heating systems.

Lower maintenance requirements

With heat generation centralised, property owners have fewer individual components to maintain. While annual HIU servicing is essential, it helps ensure efficiency and prevents system imbalances, offering a more reliable and cost-effective solution.

Stable heat supply & smart control

HIUs provide a consistent flow of hot water and heating, preventing temperature fluctuations common in decentralised systems. Many modern HIUs come with smart technology, enabling remote monitoring and control, improving efficiency and compliance with energy regulations.

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Trust our expert plumbers to handle all your needs with precision and reliability. With years of experience across London, we’re here to help! Call us on 0208 8797372 or email hello@happydogplumbing.london