The Landlord gas safety inspection is a safety check of all the gas appliances within a property that is classed as rented. Once an inspection is carried out the gas safe engineer carrying out the inspection will issue a certificate with his findings. 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.