By Canada. Office of Energy Efficiency
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The operating efficiency of a domestic hot water system can be improved significantly by carefully designing the system. Selecting equipment that generates the hot water more efficiently reduces stack and standby losses. Modifying an existing system, including piping modifications, can also reduce some of the standby losses. High-Efficiency Condensing Gas Water Heaters Gas water heaters that are more efficient than before are appearing on the Canadian market. An additional heat exchanger uses the incoming cold water to cool the heatexchange surface areas to the condensation point of the flue gases.
Furthermore, the insulation should not come in contact with the vent connector. • Install a heat trap above the water heater. A heat trap is a simple piping arrangement that prevents hot water from rising in the pipes, thereby minimizing the potential for this loss. 67 • Insulate the hot water pipes to reduce heat loss from the pipes themselves. Pipe insulation is available in a variety of materials and thicknesses, with easy application to most hot water pipes. 35 (R-2) over as much of the pipe as you can easily access.
Your utility can usually provide information on the cost of purchasing, renting or installing furnaces and the estimated seasonal heating costs of the type of equipment you plan to use. If you have decided on a particular type of furnace, read the literature carefully to find out if it describes the features you are looking for – such as a condensing heat exchanger and a high-efficiency brushless DC motor for the circulating fan. Also, look for the EnerGuide rating. This is the seasonal efficiency (AFUE) rating, not just the steady-state efficiency.