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Future proof your refurbishment project with Purewell Variheat boilers

Choosing the right heating system for refurbishment projects - especially in older buildings - can be challenging. It’s all about striking the right balance: meeting modern performance and efficiency standards while overcoming the unique constraints of older buildings. Key factors such as energy efficiency, space limitations, regulatory compliance, and ease of installation all play a crucial role.

Let’s explore why these factors matter and how Purewell Variheat mk2 condensing cast iron boilers can help keep your refurbishment projects on track, within budget, and aligned with today’s performance and sustainability standards.

• Enhanced Siemens sequence controls A key benefit of the Purewell Variheat mk2 is its integrated Siemens sequence controls, which can manage up to 16 boiler modules and hot water circuits. This advanced control system is particularly valuable in refurbishment projects where older buildings often have more complex or outdated heating setups. By optimising each module to run only when needed and at peak efficiency, the system can help to reduce energy waste, lower running costs, and deliver more reliable, consistent heating.

• Low NOx emmissions With NOx emissions under 40mg/kWh, the Purewell Variheat mk2 also offers a cleaner, more efficient heating solution that meets European Class 6 standards. This low-emission performance is essential in retrofit projects, particularly in urban areas where air quality regulations are tightening. It also supports compliance with local environmental policies, such as London’s Clean Air Strategy, and contributes to achieving sustainability certifications like BREEAM New Construction 2018, a key factor for many commercial refurbishment projects.

• Durable cast iron heat exchanger Built for lasting reliability, the Purewell Variheat range features a robust cast iron heat exchanger with large waterways, supported by a 10-year warranty. Cast iron is a proven material in heating systems, particularly in older or more complex installations, due to its durability, high thermal mass, and ability to handle variable water quality. This makes Purewell Variheat mk2 boilers an ideal choice for refurbishment projects where system conditions can be unpredictable and long-term resilience is key.

• Space efficient design Featuring a compact footprint, the Purewell Variheat mk2 also offers the perfect solution for plant rooms where space is limited, which is a common challenge in refurbishment projects. Its size and layout allow it to replace older boilers with minimal structural alterations, helping to reduce installation time and cost. Additionally, for especially tight or awkward spaces - such as basements or narrow access routes - the boiler can be disassembled and reassembled on-site, making it a flexible solution where other systems might be impractical.

• Ease of maintenance and servicing Minimising disruption during refurbishment projects can be another major challenge, especially in buildings that remain occupied or operational throughout the upgrade process. The Purewell Variheat mk2 addresses this with features designed to simplify maintenance and reduce service time. Quick-release covers with hooks and dog points replace screws, providing easier access, while the spark ignition system allows burner servicing without full removal. This makes time-sensitive maintenance schedules more manageable.

• BIM and CAD compatibility Refurbishment projects often involve the challenge of integrating new systems into existing building layouts, making accurate planning essential. To support this, 2D CAD and 3D BIM files are available for the Purewell Variheat MK2, helping to streamline the design and specification process. These digital tools enable engineers and specifiers to plan installations more precisely, reduce design time, improve accuracy, and enhance collaboration across project teams.

The smart choice of a sustainable heating system refurb

The Purewell Variheat MK2 isn’t just designed to perform, it’s built to solve the practical challenges that refurbishment projects often present: whether it’s fitting into tight spaces, integrating seamlessly with existing infrastructure, or meeting modern environmental and efficiency standards. With proven durability, intelligent controls, and low emissions, Purewell Variheat MK2 condensing cast iron boilers provide peace of mind and long-term value, making them a dependable, future-ready choice for any commercial retrofit.