Comfort Control Systems Inc of De Pere Wi, is the Green Bay area leader in HVAC service and equipment. Our home comfort heating and cooling specialists can help with any air conditioner and furnace repair or installation. We have great deals on new furnaces, boilers and high efficiency air conditioners. Serving Green Bay and De Pere for over 40 years. All our HVAC technicians are background checked and receive factory training from the top HVAC manufacturers.