Mechanical ventilation with heat recovery (MVHR) has been one of the biggest growing product sectors in recent years . More commonly known as Heat Recovery Units (HRUs), these units provide balanced ventilation to a room or building whilst minimising the associated heat losses (or gains). Although the capital outlay on a heat recovery system is generally more than a simple fan-based solution for ventilation, heat recovery units typically pay for themselves in reduced running costs within 2-3 years. Latest Ecodesign (EU) regulations now stiplulate that all “Balanced” Ventilation units (BVU’s) must meet strict fan power limits and have heat recovery with a minimum of 67% thermal efficiency, which has pushed manufacturers to develop new, more efficient products.
On the domestic front, S&P, Zehnder & Silavent offer units based on highly efficient counter flow plate heat exchangers which are SAP Appendix Q listed.
For commercial applications, S&P produce the new CADB-HE range of units with high efficiency counter flow heat exchangers. Launched in 2016, this range features backward curved direct drive centrifugal impellers (a.k.a plug fans) powered by state of the art Electronically Commutated (EC) brushless motors. As well as delivering class leading specific fan powers (SFP) these motors come with integrated electronic variable speed capability, making them ideal for us in demand control ventilation systems.
The units come as standard with high grade F7 filtration for the supply air, and feature robust 30mm thick double-skinned & insulated casings. The smaller sizes have an innovative interchangeable panel system which allows the duct connection ports to be re-configured on site to suit the required duct layout.
The CADB-HE range is available with S&P’s factory fitted “PRO-REG” control system. This Modbus compatible control system offers Demand Control based on CO2, temperature or occupancy sensing, making it ideal for classrooms or offices with variable or intermittent occupancy. For more information on the CADB-HE range, click here to go the S&P website.
The most energy efficient form of heat recovery comes from Thermal Wheel recuperators, and again we can offer several options. S&P’s sophisticated RHE range is one of only a handful of HRUs that is listed on the government’s Energy Technology List (ETL), making it elligible for Enhanced Capital Allowance.
The RHE range is a state-of-the-art ventilation unit featuring up to 88% thermal efficiency thanks to a rotary wheel recuperator. All models feature fully packaged controls capable of remote monitoring and BMS integration. Options include built in electric heating, LPHW heating, reversible heating/cooling coil and DX cooling. Nominal airflows range from 700m3/h up to 10,000m3/h (0.19 m3/sec to 2.7 m3/sec), and outdoor versions are also available.
The units are fully compliant with both current and 2018 ErP regulations relating to Ventilation Units, and meet or exceed all current UK & Ireland building regulations (when correctly selected and installed in a correctly designed system)
When it comes to heat recovery ventilation systems for larger commercial & industrial applications, look no further than Fairhaven to design and specify a bespoke Air Handling Unit (AHU) with heat recovery. Fairhaven have been supplying Air Handling units for over 25 years, and have experience in a number of specialist applications such as pharmaceutical, food processing, medical and low temperature environments.
For information and advice on any type of Heat Recovery Ventilation unit, please contact us.