{ "$schema": "installation-guide.schema.json", "schema_version": "1.0", "id": "water-heater-installation", "version": "1.0.1", "updated": "2026-09-09", "title": "Water heater installation & replacement", "summary": "Choose the heater. Plan the whole job. Compare six equipment types, understand what the house needs, and bring better questions to an installation visit.", "page_path": "/services/water-heater-installation/", "hub_path": "/water-heater-repair/", "maintainer": "Mountain Man Plumbing", "scope": "Plan a residential water-heater replacement in Sandy and the Salt Lake Valley. Compare hot-water delivery, equipment choices and the work needed to connect each option in your home.", "updates": { "knowledge": "Editorially maintained; the revision date changes when this record is reviewed or edited.", "projects": "The page uses the site's existing automatic feed of published water-heater projects. New published jobs do not change the technical record's review date.", "formats": [ "HTML", "JSON", "Agent-Net Markdown", "Agent-Net JSON" ] }, "history": [ { "date": "2026-09-09", "version": "1.0.1", "change": "Clarified equipment-selection explanations and the checks used to assess electrical, gas and hot-water capacity." }, { "version": "1.0.0", "date": "2026-09-09", "change": "Replaced the legacy installation guide with linked equipment, planning, terminology and source records." } ], "sources": [ { "id": "ratings", "title": "ENERGY STAR · Water heater ratings", "url": "https://www.energystar.gov/products/water_heaters/residential_water_heaters_key_product_criteria", "checked": "2026-09-09", "scope": "First-hour rating, gallons per minute and energy-efficiency terminology." }, { "id": "hp-design", "title": "ENERGY STAR · Heat-pump design considerations", "url": "https://www.energystar.gov/partner-resources/residential_new/educational_resources/sup_program_guidance/heat_pump_water_heater_guide/design_considerations", "checked": "2026-09-09", "scope": "Air, sound, room temperature, condensate and model-dependent electrical requirements." }, { "id": "hp-access", "title": "ENERGY STAR · Heat-pump installation planning", "url": "https://www.energystar.gov/partner-resources/residential_new/educational_resources/sup_program_guidance/heat_pump_water_heater_guide/installation_best_practices", "checked": "2026-09-09", "scope": "Access to controls, filters, service connections and drainage." }, { "id": "tankless", "title": "U.S. Department of Energy · Transitioning to tankless", "url": "https://www1.eere.energy.gov/buildings/publications/pdfs/building_america/measure_guide_tanklesswh.pdf", "checked": "2026-09-09", "scope": "2012 building-science guide: demand, delivery distance and gas/electric conversion considerations. Not a current price list or local code." }, { "id": "navien", "title": "Navien · NPE-2 installation manual", "url": "https://www.navieninc.com/downloads/npe-a-s-manuals-installation-manual-en", "checked": "2026-09-09", "scope": "An example of model-specific gas, vent, water and drain planning. NPE-2 details do not apply to every tankless heater." }, { "id": "gas-tank", "title": "A. O. Smith · Residential gas tank manual", "url": "https://assets.hotwater.com/damroot/Original/10001/100263112.pdf", "checked": "2026-09-09", "scope": "Example gas-tank requirements for venting, water pressure, expansion and relief discharge. Match the manual to the installed model." }, { "id": "indirect", "title": "Amtrol · BoilerMate installation and operation", "url": "https://www.amtrol.com/wp-content/uploads/2025/08/9040-586-07_25-BOILERMATE-IO.pdf", "checked": "2026-09-09", "scope": "How an indirect tank uses boiler heat; product-specific manual and performance information." } ], "equipment": [ { "id": "gas-tank", "name": "Gas storage tank", "short": "A burner heats stored water.", "explanation": "A gas burner heats a tank of water ahead of use. The tank stores hot water, and the burner replenishes it as you draw water.", "decision": "A familiar replacement still needs a fit check: the new heater's exhaust requirements may differ from the old one.", "capacity": "Compare first-hour rating: the hot water it can deliver during an hour that starts with a fully heated tank. The gallon label alone leaves out reheating.", "checks": [ "demand", "fit", "gas", "vent", "water", "handoff" ], "questions": [ "What is the exact model and first-hour rating?", "Can the existing exhaust route serve this model?", "Which connection or protection changes are included?" ], "source_ids": [ "ratings", "gas-tank" ], "learn": { "path": "/water-heater-repair/#whr-cutaway", "label": "Explore a gas tank in 3D" } }, { "id": "electric-tank", "name": "Electric storage tank", "short": "Electric elements heat stored water.", "explanation": "Electric elements inside the tank heat the stored water. The thermostats turn them on as the water cools and stop heating when it reaches the set temperature.", "decision": "Check the replacement model’s voltage, power and circuit requirements against the existing electrical supply.", "capacity": "Compare first-hour rating, the hot water delivered during an hour that starts with a fully heated tank. It accounts for stored water and reheating during that busy hour.", "checks": [ "demand", "fit", "electrical", "water", "handoff" ], "questions": [ "Does this model fit the available circuit?", "How will it handle our busiest hot-water hour?", "Can it be serviced and removed in this location?" ], "source_ids": [ "ratings", "hp-design" ], "learn": { "path": "/water-heater-sizing/", "label": "Work through hot-water sizing" } }, { "id": "heat-pump", "name": "Heat-pump water heater", "short": "Room heat goes into a storage tank.", "explanation": "A fan and compressor move heat from surrounding air into stored water. Many models also have electric elements to help when demand is high.", "decision": "The room is part of the system. Plan for airflow, cooler air, sound and a drain for the water that collects from the air.", "capacity": "Compare first-hour rating and the operating mode used to achieve it. A mode that uses backup electric elements can meet a larger draw while using more electricity.", "checks": [ "demand", "fit", "air", "electrical", "condensate", "water", "handoff" ], "questions": [ "Does this room meet the model's air and temperature requirements?", "Where will collected water drain?", "Which mode balances recovery and energy use for us?" ], "source_ids": [ "hp-design", "hp-access", "ratings" ], "learn": { "path": "/water-heater-sizing/", "label": "Compare demand and recovery" } }, { "id": "gas-tankless", "name": "Gas tankless", "short": "A burner heats water as it flows.", "explanation": "Water passes through a heat exchanger, where metal transfers the burner’s heat into it. A condensing model also captures heat from the exhaust and drains the resulting condensation.", "decision": "Assess fuel delivery, the approved exhaust route, electrical supply, service access and, for a condensing model, a condensate drain.", "capacity": "Compare the rated gallons per minute at your winter temperature rise.", "checks": [ "demand", "fit", "gas", "vent", "electrical", "condensate", "water", "handoff" ], "questions": [ "What flow can this model deliver with our cold winter inlet water?", "Can the gas system support it while other appliances run?", "Will I still wait for hot water at a distant tap?" ], "source_ids": [ "tankless", "navien" ], "learn": { "path": "#whr-tankless", "label": "Explore the tankless cutaway below" } }, { "id": "electric-tankless", "name": "Electric tankless", "short": "Electric elements heat flowing water.", "explanation": "Electric elements heat water as it passes through the unit. There is no gas burner or combustion exhaust.", "decision": "Whole-home electric tankless can require substantial electrical capacity. Have the circuits, panel and service evaluated early so any upgrades are included in the plan.", "capacity": "Check the model's flow chart at the required temperature rise.", "checks": [ "demand", "fit", "electrical", "water", "handoff" ], "questions": [ "What service, panel and circuit work would this model need?", "Who is responsible for that electrical work?", "What simultaneous hot-water demand can it actually meet?" ], "source_ids": [ "tankless" ], "learn": { "path": "/water-heater-sizing/", "label": "Understand flow and temperature rise" } }, { "id": "indirect", "name": "Boiler-heated indirect tank", "short": "The boiler supplies the heat.", "explanation": "An indirect tank stores household hot water but gets its heat from a boiler through a heat exchanger. The boiler's heating water and household water remain separate.", "decision": "Check how much hot water the tank stores and how quickly the boiler and coil can reheat it between showers.", "capacity": "Use the tank's performance data with the actual boiler and control arrangement.", "checks": [ "demand", "fit", "boiler", "water", "handoff" ], "questions": [ "Does the proposed tank match the boiler's available output?", "How does a hot-water call affect space heating?", "Which pumps and controls are needed to heat the tank?" ], "source_ids": [ "indirect" ], "learn": { "path": "/boiler-repair/", "label": "Understand the boiler side" } } ], "checks": [ { "id": "demand", "title": "Hot water you actually use", "why": "List the showers, baths and appliances you want to run together. That gives the capacity discussion a real target.", "bring": "Your busiest hot-water period, overlapping uses and what the current heater fails to do.", "tech": "Match the household routine to the rating. Use first-hour delivery for a storage tank and gallons per minute at the required temperature rise for tankless.", "source_ids": [ "ratings", "tankless" ] }, { "id": "fit", "title": "The room and the way in", "why": "A heater needs room to fit, connect and be maintained. Delivery access and future removal matter too.", "bring": "A full-room photo, door/access measurements and clear photos of the existing connections. Keep covers in place.", "tech": "Compare the model's installation and service clearances with the actual room, including access to controls and replaceable parts.", "source_ids": [ "hp-access", "navien" ] }, { "id": "gas", "title": "Enough gas while things are running", "why": "Check the gas supply capacity against the new appliance’s input and the equipment sharing its route.", "bring": "The other gas appliances in the home and any planned additions.", "tech": "Assess the shared supply and measure pressure entering the heater while it is running. Compare that result with the model's inlet-pressure requirements.", "source_ids": [ "navien" ] }, { "id": "vent", "title": "Air in. Exhaust outside.", "why": "Gas appliances need air for burning fuel and an approved route for exhaust. Two gas heaters may use different vent systems.", "bring": "Photos of visible venting and the place it ends outdoors, if safely visible from the ground.", "tech": "Match materials, routing, termination and combustion-air requirements to the exact appliance manual and local requirements.", "source_ids": [ "gas-tank", "navien" ] }, { "id": "electrical", "title": "Power the model can actually use", "why": "An electric heater needs circuits of the correct voltage and capacity. The electrician also checks how its demand fits alongside the other loads in the home.", "bring": "Heater model details and a photo of the closed electrical panel's labels. Do not remove the panel cover.", "tech": "Include the circuits, wiring and any panel or service upgrade needed to supply the selected heater.", "source_ids": [ "tankless", "hp-design" ] }, { "id": "air", "title": "Room air for a heat pump", "why": "The fan and compressor exchange heat with the room, so air supply, temperature and nearby living spaces affect the choice.", "bring": "Room dimensions, whether the door stays closed and any bedroom or quiet space nearby.", "tech": "Check the manufacturer's allowed air arrangement and operating temperatures; plan for sound and cooler discharge air.", "source_ids": [ "hp-design" ] }, { "id": "condensate", "title": "A route for collected water", "why": "Heat-pump tanks collect moisture from room air. Condensing gas heaters produce acidic water from cooled exhaust. These are different drain-planning needs.", "bring": "The location of nearby drains and any history of freezing or drain backups.", "tech": "Check the exact equipment's drainage requirements, including any pump or condensate treatment needed for the installation.", "source_ids": [ "hp-design", "navien" ] }, { "id": "boiler", "title": "The boiler and tank working together", "why": "The indirect tank depends on the boiler, its water circulation and controls for heat.", "bring": "Both model labels and any history of the rooms cooling off during a hot-water call.", "tech": "Compare the tank's ratings at the specified boiler conditions. Confirm whether hot water gets priority—temporarily taking heat ahead of the rooms—and how the controls manage that.", "source_ids": [ "indirect" ] }, { "id": "water", "title": "Water pressure and protection", "why": "Heating makes water expand. When a check valve prevents that extra water from moving back toward the supply, an expansion tank gives it room. The heater’s safety relief valve opens at its rated pressure or, on a temperature-and-pressure valve, either rated limit.", "bring": "Photos of the existing small expansion tank, shutoff, drain pan and visible relief pipe, where present.", "tech": "Check pressure, required expansion control, leak protection and relief discharge. Never cap a relief outlet to stop a drip.", "source_ids": [ "gas-tank" ] }, { "id": "handoff", "title": "A finished job you understand", "why": "Know what was installed, how to use it, and what maintenance comes next.", "bring": "Your questions about settings, warranty, service access and who to call if something changes.", "tech": "At handoff, record the startup readings and show the homeowner the controls, shutoffs and maintenance schedule. Leave the model, serial number and warranty documents together.", "source_ids": [ "gas-tank", "navien" ] } ], "terms": [ { "id": "first-hour-rating", "name": "First-hour rating (FHR)", "meaning": "The rated gallons a storage heater can supply in an hour that starts with the tank fully hot. It includes stored water and reheating.", "source_ids": [ "ratings" ] }, { "id": "temperature-rise", "name": "Temperature rise", "meaning": "How many degrees the heater adds. Water entering at 40°F and leaving at 120°F needs an 80°F rise.", "source_ids": [ "tankless" ] }, { "id": "gpm", "name": "Gallons per minute (GPM)", "meaning": "Water flow each minute. A tankless rating only helps when you also know the temperature rise used for that rating.", "source_ids": [ "ratings" ] }, { "id": "recirculation", "name": "Recirculation", "meaning": "A pump and return path move hot water closer to the taps to reduce waiting. The heater, piping and controls must work together.", "source_ids": [ "tankless" ] }, { "id": "commissioning", "name": "Commissioning", "meaning": "The startup checks and records that show how the installed equipment is operating before handoff.", "source_ids": [ "navien" ] } ], "quote_items": [ { "id": "equipment", "title": "The exact heater", "question": "Which model, fuel, capacity rating and included accessories are we comparing?" }, { "id": "connections", "title": "Work around the heater", "question": "Which water, gas, vent, electrical and drain changes are included—and why?" }, { "id": "access", "title": "Access and removal", "question": "Who handles the old heater, access restrictions and any opening or restoration work?" }, { "id": "coordination", "title": "Permits and other trades", "question": "What approvals or electrical work does this job need, and who arranges them?" }, { "id": "startup", "title": "Startup and handoff", "question": "What operating checks, documentation and control walkthrough are included?" }, { "id": "unknowns", "title": "Price, warranty and unknowns", "question": "What is the total price, and what work would cost extra if a hidden problem is found?" } ], "faqs": [ { "id": "best", "question": "Which type is best for my house?", "answer": "Start with the busiest hot-water period in your home, then compare equipment that can handle it. Space, fuel or electrical supply, venting and drainage determine the changes needed to install each option.", "source_ids": [ "hp-design", "tankless" ] }, { "id": "same-size", "question": "Can I just buy the same number of gallons?", "answer": "Gallons describe stored volume. First-hour rating adds how the heater performs during a busy hour. Compare that rating as well as the physical fit and connection requirements.", "source_ids": [ "ratings" ] }, { "id": "tankless-wait", "question": "Will tankless give me instant hot water?", "answer": "It heats on demand, but cooled water in the pipe still has to leave before hot water reaches the tap. Ask about the pipe distance and any compatible recirculation arrangement.", "source_ids": [ "tankless" ] }, { "id": "repair", "question": "What if I do not need a new heater?", "answer": "The repair guide helps you work through a leak, short shower or error message. Note when the problem happens and what you see so we can find the cause.", "source_ids": [] }, { "id": "quote", "question": "Why is there no instant installation price?", "answer": "Access, gas or electrical upgrades, vent changes and new drain routes can add to the installation. The estimate should name those changes so you can see where the price comes from.", "source_ids": [] } ] }