Yes, we work on a variety of different systems including heatpumps, ranging from basic to high efficiancy on all brands.
We suggest checking filters monthly. If you have a disposible type filter, (these ususally have a cardboard edge), and if it is dirty just replace it.
Optimum indoor range is around 35% relative humidity, but 30% to 40% tends to work best for many homes. If you go above this level, condensation on the windows can occur, breeding mold that leads to allergy and respiratory problems.
R-22 is a refrigerant often used in air conditioner and heat pumps. Because R-22 depletes the ozone layer, production and import was significantly reduced in 2010. The United States Enviromental Protection Agency (EPA) reduced the production of R-22 refrigerant once again in 2013. This represents a 70% reduction from the approved R-22 production for 2010. Since 2015, there has been almost a complete ban on the production of R-22.
Frist the price of R-22 is skyrocketing as we speak. Secondly the supply of R-22 is limited and eventually contactors may not be able to guarentee to always have R-22 on hand.