Boilers By: Jason Ng

Objectives Effectively compare and contrast different types of water heating systems in order to enlighten students about proper choice making when it comes to choosing a heating system for a home.

Selection Criteria Types of water heaters Conventional Storage Demand water heaters Heat Pumps Solar Water heaters  Tankless coil or Indirect heaters Energy Efficiency Fuel types Size

Tankless Coil Water Heaters Provides hot water on demand, without a tank Works most efficiently during cold months Energy is wasted during warm months

Indirect Water Heaters Storage tank required Allows boiler to work less often More efficient for homes Works well with radiant floor heating systems

Fuel Cost Comparison Chart Estimated Annual Heating Cost for Selected Fuels Heating EfficiencyFuel Cost Energy use/1500ft 2 Energy Cost for a well insulated 1500ft 2 home Electric Resistance3413Btu/kWh100%$0.03/kWh23440kWh$ Propane92000Btu/gal92%$0.90/gal945gal$ Natural Gas Btu/th erm92%$0.70/therm870therms$609.00

Efficiency Rating : Energy Factor (EF) EF based on: Recovery efficiency Stand by losses Cycling losses Higher EF = Higher Efficiency Higher EF does not necessarily mean lower costs

Conclusion After having listened and comprehended the information presented, one should now have enough understanding of water heating systems in order to make an informed decision about what kind of systems to use for different needs

References ilers.cfm er_heating/index.cfm/mytopic= default.asp