Thermador PH36GS Design Guide - Ventilation - Page 60

VENTILATION - DOWNDRAFT DOWNDRAFT FEATURES & BENEFITS Choosing the Right CFM The power of the cooktop, measured in BTU, is perhaps the most important factor in determining CFM needs for a hood. Professional Gas Rangetops generally should have 1 CFM for every 100 BTU. You should also consider the cooking space and cooking style of your client. • More demanding cooks usually require more exhaust capacity to handle moisture generated by boiling large pots of water or the grease and smoke resulting from grilling or frying. This cooking style could require a hood or downdraft system with airflow of 600 to 1,300 CFM. • For those who are used to preparing quick meals in a relatively small kitchen, a hood with 600 CFM may be adequate ventilation for the cooking space. • If the cooking surface is in a peninsula or island, a larger capacity hood can provide better capture when there are cross currents and when the hood needs to be mounted higher. Downdraft ventilation systems are also a good alternative. • High heat cooking or aromatic foods may require additional CFM. Increasing capture area by 3" on each side is also a recommended way to address this issue. Length and Size of Ductwork Do not use flexible duct; it creates back pressure/air turbulence and reduces performance. Straight runs and gradual turns are best. Use the shortest route with the fewest turns possible. Proper performance is dependent upon proper ducting. Use a qualified and trained installer. Local building codes may require the use of make-up air systems when using ducted ventilation systems greater than specified CFM of air movement. The specified CFM varies from locale to locale. Consult your HVAC professional for specific requirements in your area. If using a 10" duct, Thermador recommends not exceeding 150 feet of duct. Transitions, elbows and wall or roof caps are all factors that will add more static pressure, therefore increasing your equivalent duct run. WARRANTY Limited warranty parts and labor (2 year) See page 308 for additional warranty details. BLOWER OPTIONS REMOTE Requires CV2T6 or CV2T10 Transition VTR630D - 600 CFM Use RFPLT600 in roof-mount applications VTR1030D - 1000 CFM Use RFPLT1000 in roof-mount applications INLINE Requires CV2T6 or CV2T10 Transition VTI610D - 600 CFM VTI1010D - 1000 CFM INTEGRATED VTN600CV2C - 600 CFM REMOTE (Mounted to roof or external wall) VTR630D - 600 CFM VTR1030D - 1000 CFM INLINE (Mounted between kitchen and external wall) VTI610D - 600 CFM VTI1010D - 1000 CFM INTEGRATED (Mounted on hood) VTN600CV2C - 600 CFM ­REMOTE BLOWER ACCESSORIES RFPLT600 For use with Remote Blower VTR630D RFPLT1000 For use with Remote Blower VTR1030D 1.800.735.4328 | THERMADOR.COM 187