Building Performance Institute (BPI) and the International Ground Source Heat Pump Association (IGSHPA) are offering referral discounts to HVAC certification classes. Refer a friend or colleague, and both parties will receive an additional $50 off of the class price. Persons who refer five enrolling students receive free trainng. The following information can be found online:

• http://bit.ly/bpibuildinganalyst
• http://bit.ly/bpibuildinganalystonline
• http://bit.ly/bpibuildingenvelope
• http://bit.ly/bpibuildinganalystenvelopeshell
• http://bit.ly/bpiheatingspecialist
• http://bit.ly/bpimultifamily
• http://bit.ly/bpiacheatpump
• http://bit.ly/bpimanufhousing
• http://bit.ly/bpigeotherma
• http://bit.ly/bpidriller