Water Heater Buying Guide
Serving San Diego, San Francisco, San Antonio, Atlanta, and all major U.S. cities
Choosing the right water heater is crucial for comfort, energy efficiency, and cost savings. Consider your family size, home size, and local utilities when selecting a residential or commercial water heater. Our guide helps you pick a model that balances performance, efficiency, and affordability.
Maximum Bathrooms for a Single Unit
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Up to 4 Bathrooms:
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Largest tankless water heaters: 45-H Natural Gas, H-45 Natural Gas/Propane, or IE-27, IE-24, IE-18 Electric.
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For homes under 2,500 sq. ft. with 3 bathrooms or less, IV-12 models are ideal.
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For larger homes over 2,500 sq. ft. with 3+ bathrooms, H-45 models are recommended.
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More than 4 Bathrooms:
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Install two or more units to meet demand. Tankless heaters are highly scalable — up to 22 units can be installed for extreme needs.
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In extremely cold climates, 3 bathrooms per unit is the maximum recommended.
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General Rules for Selection
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2–4 Bathrooms using Gas (Natural or Propane): H-45 unit is recommended.
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1–2 Bathrooms: IV-12 unit is ideal.
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Why Hot Water Haven?
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Expert Guidance: We help you select the right water heater for your home or business.
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Nationwide Service: San Diego, San Francisco, San Antonio, Atlanta, and all U.S. locations.
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Affordable Options: Get reliable, energy-efficient units at the lowest prices on the net.
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Call us or browse our web store today for full specs and expert recommendations.
“Now Available: Tankless Water Heaters with Flow Rates Up to 12 Gallons Per Minute Maximum Hot Water, Maximum Performance!”
Tankless Water Heater Recommendations
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Cold Climates (e.g., Michigan, Maine): Move up one category to ensure sufficient hot water. For up to 2 bathrooms, the IE-24 is recommended.
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Electric Homes with 3–4 Bathrooms: Use the IE-27. For 1–3 bathrooms, the IE-24 is ideal.
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Warm Climates (e.g., Florida, San Diego, San Francisco): For 1–2 bathrooms, the IE-18 tankless electric water heater works well. Only recommended for warmer areas.
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Point-of-Use Units: Smaller electric units like the IE-11 are best for a single sink, shower, or RV. Not suitable for whole-house use.
Tips for Accurate Selection:
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Include appliances in your calculations: kitchen dishwasher, washing machine, and showers.
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General guideline: 0.9–1.5 gallons of hot water per bathroom, but tankless heaters are engineered for higher demand.
Why Choose Hot Water Haven:
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IE-11 is available for special use and handles one bathroom efficiently.
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Our technical reps are ready to answer all your questions.
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Check our web store for full product specs.
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We offer the lowest prices on natural gas, propane, and electric tankless water heaters for residential and commercial use across Atlanta, New York, Houston, and nationwide in the U.S.
Mailing address 200 Longwood dr Jonesboro GA 30236 404 839 8400
Mailing address 200 Longwood dr Jonesboro GA 30236 404 839 8400
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“10L Gas Tankless Water Heater Perfect for 2–3 Bathrooms, Only $475! Incredible Value Don’t Miss Out!”
Check Our Web Store for Specs and Best Prices!
Explore our full range of tankless and traditional water heaters with detailed product specifications and the lowest prices online.