Fan coils


www .heatingandventilating.net


in ventilation A masterclass


and with air pollution levels continuing to rise in the UK, especially in cities, it has become increasingly ir quality in classrooms has a major bearing on the academic performance and productivity of occupants


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important that these issues are addressed. Dunham-Bush’s commercial manager, John Tarling explores some innovative solutions


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2006.Working in parallel with BB93: ‘Acoustic designs for schools, performance changes in ventilation design, regulation and guidance in schools since


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school or college and new guidance for science labs and other practical areas. BB101 guidelines on ventilation include standards for all spaces within a environment in schools with the emphasis very much on energy efficiency. standards (2015),’ it gives a detailed holistic approach to the internal


weather conditions, including high winds and rain. Final ventilation designs will All ventilation systems must have the capability to operate in typical UK


depend on the following key factors:


• Local air quality / levels of pollution • Site ambient noise levels • Type of construction • Building loc ation


mass is present, to maintain acceptable internal room temper cooling strategy is recommended, especially where appropr correctly model schools. Good ventilation combined with an CIBSE TM52 ‘Limits of Thermal Comfort: Avoiding Overheatin g


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Preventing overheating in summer is a major factor in school design and • Patterns / type of use • Amount of glazing / solar gain


eratures during iate building thermal effective night ng’ is intended to g


nine chassis sizes and airflows ranging from 50 to 600 l/s, C from Dunham-Bush, complies with the latest BB101 and BB93 guidelines. specifically for classr ooms and as with all the VHR range of The Classmaster heat recovery ventilation unit has been d summer months.


Classmaster delivers 93 guidelines. With units now available developed


turbulent velocity airflow across the heat exchanger. This is not possible with maintains thermal efficiency at both 100% and 50% airflow l Key features include a patented variable air mass flow he the highest standards of air quality to meet classroom requi


not possible with levels by keeping


at exchanger, which rements.


and indoor air quality 2018’ has been instrumental in the most significant eleased by the government last year, BB101: ‘Ventilation, thermal comfort


conventional heat exchangers, as airflow goes into a laminar flow with little or


100,000-hour long life, low energy EC fans, delivers minimal sound levels and The configuration of low resistance heat exchangers, used in conjunction with no exchange of thermal energy.


In line with the latest BB101 guidance bulletin, Classmaster units have the heat reclaim efficiency of up to 89%.


of frost and heating coils pre-installed in insulated casings and matched flanges range of Classmaster and VHR heat recovery and ventilation units, with a range ceiling void or surface mounted. Space heating options are available across the With a low-profile height of 300mm, Classmaster can be installed within a option of ePM 2.5 (F7) filters for inner city installations.


to fit directly onto heat recovery units. Versatile control options


standard. Fans switch automatically to boost speed when CO2 is detected. automatic summer by-pass and night time cool adjustable fan speeds on trickle and boost settings with fr controller can give fault outputs to the Eco-Fau (


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Additional ultra-low energy summer trickle mode and a ful and monitoring is available with filter monitoring via buil Full integration with BMS B ACnet or Trend sy automatic summer by-pass and night time cool speeds on trickle and boost settings in all mode The factory fitted Trend IQ422 Controller offe


Optional colour touchscreen user fan controller using a re-circulation damper and LPHW coil ar


humidity sensors are also available.


via volt free contact (VFC) from a time switch or BMS (enable/disable signal). The can be used where stand-alone control is required. Units can be activated either The factory fitted Eco-Pro 3 Controller offers a plug and play capability and is


lt panel or BMS panel. Individually (


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es of operation. Frost protection, ers individual and adjustable fan peed when CO2 is detected. ling options, are included as ings with frost protection,


ystems for energy management ling options are standard.


rs with built-in temperature and re included in the programming. ode and a full space heating facility ng via built in DP switches.


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