engines used by the BMW and MINI brands, and itâs an improved version of the N54 and N55 units which both own awards in the past. The BMW N55 engine was something of legend. It was easily one of the best engines on the market throughout its entire tenure, regardless of what else was on the market.
Definition - What does Windows Presentation Foundation (WPF) mean? Windows Presentation Foundation (WPF) is a part of the Windows operating system that provides graphical user interfaces and environments for applications and services tha are developed and executed on Windows OS. WPF is a subsystem in the Windows OS that appeared in the Windows Vista version.
Le 6 June 2012 By Melissa Dupuis. HSPF is an acronym that stands for âHeating Seasonal Performance Factorâ. HSPF is a rating like SEER but instead of being a rating used to measure the efficiency of a cooling system, it is a rating to measure specifically the heating efficiency of a heat pump.A heat pump has both a SEER and an HSPF rating since it can both cool and heat a building. In 2012, the highest HSPF rating on a heat pump is approximately 13. 2  If you refer to the chart below, you can save approximately $200 if you own a 9 HSPF heat pump versus owning a 7 HSPF heat pump. 3  Note that it is with a 3 ton heat pump with an average electricity rate of $0.086 (Quebec base rate is approx $0.0751).