Amendment 2. Replacement Hot Water Heater
Amendment 2. Replacement Hot Water Heater
Devin Schleidt Schleidt Works LLC 48 Prospect St Portland, CT 06480 John H. Spang, Jr. Director Of Finance Preston Public Schools 325 Shetucket Turnpike Preston, Connecticut 06365 11/28/2016 John, I am preparing this letter to assist a contractor who will prepare a bid to select a cost effective and energy efficient solution for the water heater. I will outline the current system and some of the solutions available. Current System: The current unit is a 200 gallon A.O. Smith oil fired water heater. The system is approximately 15 years old and has reached end of life. Below are photos of the water heater and its manufacturing plates outlining its capacity:
Additionally, here are some photos of the blower capacity and the oil supplement pump.
The demand on the system consists of the following: 50 adults and 300 elementary students for a total of 350 people 48 Sinks 5 Basin Sinks 2 Pot Sink 1 Dishwasher system – below is a photo of the manufacture’s plate
The current water heater keeps 200 gallons of water at 140F. A water mixing valve is used to produce 120F water to support sinks throughout the school. Solutions for the system:
The solution for the system should be both cost effective and energy efficient. There are multiple options for the current system. Below are two of these options. Each of these has multiple variables such as overall total system cost, efficiency, fuel cost and payback: 1. Replace the current water heater with a similar sized system. Instead of using a oil fired water heater, use a large heat pump water heater. 2. Eliminate the mixing valve and separate the system so that the dishwasher has its own dedicated heat pump water heater and the sinks will have their own heat pump water heater. By isolating the systems, the energy required for each system will be at their optimal temperature. Also, due to the modification, the systems can be independently shut down or reduced when school is not in session. Each contractor will have their own solution for the system. I would ask that they produce payback calculations in order to determine the most cost effective solution.
Devin Schleidt Schleidt Works LLC 48 Prospect St Portland, CT 06480 John H. Spang, Jr. Director Of Finance Preston Public Schools 325 Shetucket Turnpike Preston, Connecticut 06365 11/28/2016 John, I am preparing this letter to assist a contractor who will prepare a bid to select a cost effective and energy efficient solution for the water heater. I will outline the current system and some of the solutions available. Current System: The current unit is a 200 gallon A.O. Smith oil fired water heater. The system is approximately 15 years old and has reached end of life. Below are photos of the water heater and its manufacturing plates outlining its capacity:
Additionally, here are some photos of the blower capacity and the oil supplement pump.
The demand on the system consists of the following: 50 adults and 300 elementary students for a total of 350 people 48 Sinks 5 Basin Sinks 2 Pot Sink 1 Dishwasher system – below is a photo of the manufacture’s plate
The current water heater keeps 200 gallons of water at 140F. A water mixing valve is used to produce 120F water to support sinks throughout the school. Solutions for the system:
The solution for the system should be both cost effective and energy efficient. There are multiple options for the current system. Below are two of these options. Each of these has multiple variables such as overall total system cost, efficiency, fuel cost and payback: 1. Replace the current water heater with a similar sized system. Instead of using a oil fired water heater, use a large heat pump water heater. 2. Eliminate the mixing valve and separate the system so that the dishwasher has its own dedicated heat pump water heater and the sinks will have their own heat pump water heater. By isolating the systems, the energy required for each system will be at their optimal temperature. Also, due to the modification, the systems can be independently shut down or reduced when school is not in session. Each contractor will have their own solution for the system. I would ask that they produce payback calculations in order to determine the most cost effective solution.
