Getting an electrical certificate is an important part of being a landlord or if you are selling your home. To schedule an inspection, approach a well-known and recommended gas and electrical certificates engineer. Refrigerant Oil Enhancement has proven to be highly effective, affordable and able to increase efficiency in air conditioning HVAC, chiller and walk in refrigeration units. This efficiency technology requires no new HVAC equipment and in a commercial setting will show a payback ROI within a year. This conservation product is a specifically blended refrigerant oil supplement that has multiple beneficial attributes when added to the refrigerant line of existing HVAC compressors along with the existing refrigerant oil.