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Question
What rating is assigned to all electric, gas, and oil-fired storage type water heaters sold in the United States?
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Answer
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Related questions
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the installation cost divided by the annual operating cost savings b.
the number of years required for the investment to repay the higher initial cost using the savings it generates, relative to that of a conventional system c.
the number of years required for the annual operating cost savings to equal the installation cost d.
the installation cost divided by the difference between the installation cost of the system and a conventional system
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How is after-tax lost opportunity cost calculated? a.
total interest income earned multiplied by percentage of income retained by the owner b.
total interest income earned multiplied by income tax percentage c.
installation cost divided by annual operating cost savings d.
total cost of owning and operating a system on an annual basis
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What do straight lines on a simple payback curve imply? a.
The inflation of fuel cost was included. b.
The inflation of fuel cost was not included. c.
The fuel cost was not considered in the calculation. d.
The installation cost was not considered in the calculation.
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minimum fluid temperature b.
serial or parallel piping layout c.
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about equal to the average annual outside air temperature b.
about equal to the average low summer air temperature c.
about equal to the average high winter air temperature d.
about 65 degrees F in most areas of North America
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the ratio of heating load to total heating and cooling load b.
the percentage of total load it can meet c.
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Its components last longer because they must be made of non-corroding materials. b.
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Maximum head loss is generally independent of flow rate. a.
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Which code requirements may vary between locations? a.
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percent of total heat load that may be supplied by solar energy c.
requirement for grounding and pressure-relief valves d.
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piping arrangement and inlet water temperature c.
average water temperature in the tank and size of heat exchanger d.
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Repurposed propane tanks can be used in both open and closed hydronic systems. a.
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What is used to calculate net collector area for an evacuated tube solar collector? a.
outer dimensions of the collector housing b.
dimensions of exposed glazing c.
dimensions of the absorber plate and headers d.
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