PRODUCTS & SERVICES Products of the month Rinnais new CPD on heat pump seasonal performance factors approved CPD explores new methodology for evaluating efficiency of heating systems R innai has unveiled a CIBSE-approved CPD on seasonal performance factors (SPF) for heat pumps. Presented by Sean Ehlen MEng, the CPD explores a new methodology for evaluating the efficiency of commercial heating and hot water systems. A focus group of consultants, systems designers and contractors delved into the potential of SPF, marking a significant step toward transparency, cost-effectiveness, and performance expectations in the industry. The CPD started as a comprehensive white paper by Ehlen, which serves as a guide to understanding the intricacies of SPF. It is available to view for free on Rinnais website, www.rinnai-uk.co.uk. The goal of this resource is to empower professionals and end-users with a deeper understanding of the efficiency metrics that drive decision-making in commercial heating and hot water systems. The focus group was an interactive platform for introducing an alternative evaluation methodology: SPF. Ehlen, as the presenter, talked about the nuances of this new approach and fielded questions from the engaged audience. The consensus was unanimous SPF offers a superior level of transparency, giving customers a clearer view of system performance, associated costs, and expected outcomes. The white paper highlights the limitations of traditional manufacturer-issued efficiency measures, such as coefficient of performance (COP) and seasonal coefficient of performance (SCOP), particularly in the context of heat pumps. Typically, manufacturers gauge the efficiency of heat pumps using COP, a metric that measures the ratio of useful heat energy produced to the electricity consumed under specific external air temperature conditions. SCOP extends this assessment to cover the entire heating season. However, the white paper contends that relying on COP and SCOP to assess the efficiency of heat pumps can be limiting. Notably, these metrics primarily measure the efficiency of the heat pump unit itself, potentially overlooking the broader system dynamics. The implications of this oversight are significant, as it may lead to misaligned system expectations and, ultimately, impact the anticipated carbon reductions. To address these limitations, Rinnai proposes the SPF as an alternative evaluation methodology. This approach expands the evaluation scope to encompass all energyusing components within a commercial hot water system. By doing so, it offers a more comprehensive understanding of the systems performance, going beyond individual components to consider the entire systems efficiency. Rinnais aim of presenting this white paper to customers through their CPD is to provide customers with accurate and relevant information that enables a precise assessment of commercial hot-water heating performance. In a landscape characterised by economic constraints and escalating energy costs, Rinnai is looking to equip the UK market with the tools necessary for making informed decisions aligned with the ambitious net zero goals. In addition to advancing efficiency metrics, Rinnai has made significant strides in the field of decarbonisation with its H3 range of products. This comprehensive line-up includes hydrogen/BioLPG-ready technology, hybrid Tel: 020 7880 6245 Email: cibsedirectory@redactive.co.uk CIBSE Dec 23 pp61-64 Products.indd 61 systems, low global warming potential (GWP) heat pumps, and solar thermal solutions. Among the standout features within the H3 range are the Infinity hydrogen blend-ready and BioLPG-ready continuous flow water heaters, designed to deliver longevity, robust performance, customer satisfaction, and enhanced energy efficiency. The H3 range caters for residential and commercial applications, offering a diverse portfolio of efficient, robust and affordable decarbonisation options. It covers a broad spectrum of fuels and appliances, including electric, gas, hydrogen, BioLPG, DME, solar thermal, and low GWP heat pumps. Within the H3 range, the H1 series has a strong focus on hydrogen, anticipating its growing relevance in the energy market. Rinnais hydrogen-ready water heaters are prepared to handle 20% hydrogen blends, showcasing the worlds first 100% hydrogenready hot water heating technology. The H2 series simplifies decarbonisation with renewable gas-ready units, solar thermal, and heat pump hybrids, offering a practical and cost-effective option for specific sites. Rinnais H3 range, featuring low-GWP heat pump technology, addresses the growing demand for efficient and environmentally friendly solutions. Appliances range from 4kW to 115kW, use R32 refrigerant, and have favourable COP and SCOP. For more information, visit www.rinnai-uk.co.uk www.cibsejournal.com December 2023 61 24/11/2023 16:14