<html><head></head><body><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div>Hi,</div><div><br></div><div>we want to buy an airflow modelling tool for trnsys but we hesitate between TRNFLOW and type 159 Mathis-TRNSYS. Could you please advise us about this, especially which is the easiest one to use.<br></div><div><br></div><div>Regards,</div><div>Yossef</div></div></body></html>