Installation and Maintenance Cost Savings
The report determined that it would be $35,000 more expensive to install a replacement heat pump system, consisting of two electric heat pumps charging 1,500 gallons of water, as compared to installing 12 Rinnai RL94e Luxury Series non-condensing tankless water heaters and a heater to charge the loop. The owners expect additional savings on maintenance of the tankless units which requires less frequent maintenance than their heat pump system and can be performed by their own maintenance personnel rather than having to hire a heat pump professional.
Energy Costs & Consumption
When the cost per kW (not including the source of the electricity which could increase the cost per kW) was compared to the cost per BTU, the tankless system resulted in a nearly 7% reduction in energy costs. Energy cost savings would be even greater using Rinnai’s Condensing Tankless Water Heaters.
Space Savings and Redundancy
The choice of Rinnai gas tankless water heaters resulted in space savings as well. In the case of Island West Apartments, an entire room was freed up for other use. In addition, the 12-unit tankless system offers the owners redundancy, which allows for service and maintenance without shutting the entire system down.