HEAT RECOVERY
Caspian®
Fan
Convectors now redesigned to boost heat output by 20%
A single heating solution for a variety of applications - high, low or ceiling mounted installation
new build homes, these will be able to meet the extract ventilation rates required to help mitigate overheating in the summer if equipped with a third speed to provide a Part O purge. However, it’s well known that many housing developments have ‘problem’ areas when it comes to overheating, such as corner apartments which may have more glazing area relative to their internal floor area, and that get sunshine for longer. These apartments will most likely get hotter than surrounding apartments. MVHR is unlikely to succeed in keeping temperatures within the TM59 guidelines in these circumstances and installing air conditioning just to these specific apartments is not a practical solution due to the logistics of the refrigerant pipework and associated cost this brings, not to mention the necessity for centralised cooling plant. In these instances, a hybrid cooling system, such as Nuaire’s MRXBOX, is a good option to consider. These new hybrid systems integrate with the MVHR system and operate in conjunction with it. It combines the heat-exchanger coolth recovery of an MVHR system with the cooling effect provided by a DX coil which significantly lowers the temperature of the fresh-air supply. The MVHR is pre-programmed to target a comfortable temperature, maximising free-cooling through its bypass when the external air is cooler than internal, and coolth recovery when hotter external air can be cooled by extracted stale air from wet-rooms. The cooling module activates automatically to lower supply air temperatures when required.
Do we need a national strategy on overheating?
The introduction of Part O represents a significant step in recognising overheating as an issue in this country, and providing actionable guidance on how to mitigate it in the design of our homes. However, some types of development, such as material change of use whereby existing buildings are repurposed as much needed housing, are not covered and their potential risk of overheating has been undiminished by Part O’s introduction. Increasingly, organisations operating in the housing sector are calling on the government to develop a national strategy on overheating that is more ambitious than the current collection of policy and initiatives, and that introduces urgency into combatting and mitigating overheating. The UK Collaborative Centre for Housing Evidence goes as far to call for a lead Minister for heat resilience to act as a focal point and drive forward coordinated action in this area. Creating and adopting a national heat resilience strategy isn’t such a tall order. The government did, after all, sign up to the Global Cooling Pledge initiative at COP28, which has a commitment to produce a national cooling action plan. Ultimately, we will have to wait to see how seriously the government really takes the issue of overheating.
1.
https://www.metoffice.gov.uk/about-us/news-and-media/media-centre/ weather-and-climate-news/2025/2024-provisionally-the-fourth-warmest-year-on- record-for-the-uk
2.
https://www.gov.uk/government/publications/heat-mortality-monitoring-reports/heat- mortality-monitoring-report-2022
3.
https://www.ons.gov.uk/methodology/methodologicalpublications/ generalmethodology/onsworkingpaperseries/impactofhotdaysonproductivityin greatbritainmethodology
4.
https://assets.publishing.service.gov.uk/media/5d91ca2ded915d556d8e7b64/ Research_into_overheating_in_new_homes_-_phase_1.pdf
5.
https://www.cell.com/the-innovation/fulltext/S2666-6758(24)00026-2
SMTHS_BSEE_CASPIAN_128x358mm_SEPT_2024.indd 1 Read the latest at:
www.bsee.co.uk Smiths hp BSEE
Mar25.indd 1 09/08/2024 16:37 4/2/25 10:14 BUILDING SERVICES & ENVIRONMENTAL ENGINEER MAY 2025 7 01245 324900 |
sales@smithsep.co.uk SmithsEP.co.uk | @SmithsEP_UK | #ThinkSmiths
- Engineered for a 20% increase in heat output* - EC only fans for improved efficiency - 5-year guarantee - Manufactured in the UK
- Greater energy savings when specified with Smart Control
* Average increase across Caspian product range
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