VERTREX
MORNING STARTUP CONTROL FOR A HEATING AND AIR CONDITIONING SYSTEM THAT COMPUTES THE CORRECT TIME TO START THE SYSTEM BASED ON ACTUAL OUTSIDE TEMPERATURE AND WIND INCLUDING AN ELECTRONIC COMPUTER MODULE, A TIME CLOCK, AN OUTDOOR TEMPERATURE AND WIND VELOCITY SENSOR AND AN OPTIONAL INDOOR TEMPERATURE SENSOR
Expired · December 29, 1975 · 73072921 ·