Multi-family properties often upgrade to water conservation for toilets, shower heads, and faucets. Additionally, properties will invest in water metering to ensure data accuracy while avoiding unnecessary leakage. LED lighting upgrades are very common being that the ROI is typically 3.5 years or less. HVAC upgrades are traditionally tied to loan requirements, but common based on lending requirements and age of building(s). Solar has been installed, but is less common on the multi-family properties.