Proper definitions and comparable test methods for new heaters to tackle the challenge of a sustainable decarbonization of existing residential buildings

Immergas Spa, 42014, Brescello (RE), Italy

^* Corresponding author: zambrelli_c@immergas.com

Abstract

In the last few years there has been a growing offer and development of technologies for hydronic central heating space heaters and combination heaters. In our opinion as a manufacturer, not all new and forthcoming products seem to be covered by current standards and Ecodesign Regulation proposals. For example, some “hybrid heaters” consisting of gas boilers integrated with small-sized heat pumps seem not to fit previous definitions. Considering that future development of appliances will rely on the integration of many energy carriers, different technologies and devices in order to enhance the efficiency and environmental performance, we think that all possible and alternative design solutions should be investigated and evaluated. These appliances will contribute to widen the portfolio of possible solutions for building renovations and will provide an adding opportunity to reduce greenhouse gas emissions, with acceptable costs. Taking into account the current product standards, we propose additional definitions and new test methods that consider any possible heat recovery and integration aiming to place on the market new products under the same rules. The proposal aims to avoid loopholes and to accompany the product with the proper information on realistic significant environmental and energy performance in order to be comparable with already regulated products.