An HVAC installer can earn an average of $42,000 a year, with four or more years of experience, while those new to the field make an average of $26,000 the first three years. Working in the motor vehicle manufacturing industry can offer the highest salary, with the average employee earning $68,000 a year.he HVAC salary will typically depend on an individualâs skill level, years of experience and place of employment. The tech will working by installing, repairing and maintaining air conditioning, ventilation and heating units for commercial or residential buildings.
CFL bulbs, on the other hand, are made of glass tubes filled with gas and a small amount of mercury. The amount is so small that an old-fashioned glass thermometer holds 100 times as much mercury as one CFL bulb.he mercury in a CFL bulb also means that you should not toss burned-out bulbs in the trash. Many municipalities offer recycling services, as do retailers such as Home Depot, Wal-Mart and IKEA, although not necessarily at all locations.
Dimmable CFLs are not a 100% replacement for incandescent fixtures that are dimmed for mood scenes such as wall sconces in a dining area. Below the 20% limit, the lamp may remain at 20% or flicker or the starter circuitry may stop and restart. Above 80%, the bulb may operate at 100%. CFL has a higher purchase price than an incandescent lamp, but can save over five times its purchase price in electricity costs over the lamp's lifetime. Like all fluorescent lamps, CFLs contain toxic mercury which complicates their disposal.