The pressure transmitter comes in a number of shapes and sizes. One, referred to as a Bourdon Tube, is designed especially for monitoring non-liquid pressure. They are relatively inexpensive and good for measuring air and gas pressure in compressors. The tubes may be c-shaped, spherical and helical.
Average Pay & Benefits. The BLS groups heating technicians under the job category of Heating, Air Conditioning, and Refrigeration Mechanics and Installers. These technicians earned average incomes of $45,540 per year as of May 2011, according to the BLS. Their incomes are based on both regular and overtime pay.
When the thermometer drops, proper air flow reduces attic humidity and improves insulation performance. A contractor will charge $358 to install a 14-inch power ventilator which includes the labor and material; you can do it for more than half and pocket a 65 percent savings. That's assuming you have carpentry experience and don't have a steeply pitched roof.