16 pages
Water Heater Reference Charts
Quick answer
Water Heater Reference Charts: 16 pages. Dense reference tables drawn from the DOE test procedures, NFPA 54 gas pipe capacity tables, NEC ampacity and appliance rules, and manufacturer specifications. Every table names its source and says whether the figures are a published standard or a planning convention.
- Anode Rod Size Chart Anode rod materials, typical lengths and headroom clearance, the 1-1/16 inch hex head that is often confused with the element sock
- Drain Pan Size Chart Water heater drain pan size chart: typical tank diameter by capacity, minimum pan inside diameter, sold pan sizes, and how much wa
- Element Wattage Chart Water heater element wattage chart: current draw, resistance, 120 volt derating, and recovery rate in gallons per hour for common
- Expansion Tank Sizing Chart Expansion tank sizing chart for water heaters: thermal expansion volume by tank size and required tank volume by supply pressure,
- First Hour Rating Chart Estimated first hour rating for 30 to 80 gallon tanks in electric and gas, across 60 to 100 F rises, worked from usable storage pl
- Gas Pipe Size Chart NFPA 54 gas pipe capacity chart for water heaters: Schedule 40 pipe size by run length in cubic feet per hour, natural gas only, p
- Tankless GPM Chart Tankless water heater flow rate in GPM falls as temperature rise climbs. See gas and electric flow at every common rise before tru
- Hardness & Descaling Chart Grains per gallon converted to parts per million at 17.1 ppm per gpg, hardness classification bands, and suggested tankless descal
- Breaker and Wire Chart NEC breaker and copper wire size chart for electric water heaters by kilowatt rating, built from the 125 percent continuous load r
- BTU Chart BTU needed per gallon at each temperature rise, typical burner inputs by tank size, and the BTU-to-cubic-feet natural gas conversi
- Dimensions Chart Typical height and diameter ranges for tall, short and lowboy tanks, heat pump clearance needs, and the doorway and headroom limit
- Operating Cost Chart Annual water heater operating cost by fuel type across realistic price ranges, held at 55 gallons a day and a 70 F rise, with a ta
- Recovery Rate Chart Recovery rate in gallons per hour for common gas BTU inputs and electric wattages, across 60 to 100 F temperature rises, with the
- Size Chart by Household Peak hour hot water demand and recommended first hour rating for 1 to 6 people across 1 to 4 bathrooms, worked from the DOE per-ac
- Temperature Chart Scald time by water temperature, the Legionella growth range near 77 to 113 F, and what 120 F, 130 F and 140 F setpoints each give
- UEF Comparison Chart Typical Uniform Energy Factor by water heater type, from about 0.60 for an atmospheric gas tank to about 3.5 for a heat pump, plus