All Answers (8) 1  This is nice information from wikipedia visit. 2  I guess if you assume the DNA is at rest with an average rise of 3.4 A per base pair, then the length of chr1 would be 3.4A * 249*10^6, i.e. 847*10^6A, i.e. ~85 mm, or 8.5 cm.
Boiler sizing includes two things: 1  The heating and hot water capabilities of the boiler. 2  The physical size of your boiler and whether it will fit in the space you have it destined for.
Boilers come in two types the hot water and steam. Hot water boilers are small, compact, energy efficient and needs low maintenance. As to how they work, water is usually heated in boilers between 160 to 180 degrees Fahrenheit. The hot water is then circulated by pumps through pipes in the home or building. This heated water then warms radiators installed in the rooms and gives off the warm air.