Are friend wondering, “how lengthy does the takes because that a water heater to warm up?” search no much longer — our complete guide prize this question and much more. Check out on to learn all you need to know.

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Now that you’ve seen that water heaters can take anywhere from about half an hour up to much more than 2 hours to warm up, stop look in ~ the factors that impact how long it takes.

First-Hour distribution Rate

All water heaters have a first-hour distribution (FHD) rating. The FHD shows how numerous gallons of hot water the heater can carry out in an hour when it is full. FHD rates are provided in gallons every hour (GPH).

A high FHD rate way you’ll get an ext hot water sooner 보다 you would from a unit through a lower FHD rate. Because that a 50-gallon unit, a FHD price of around 60 come 80 GPH is good.

Recovery Rate

A water heater’s recovery rate is how many gallons of warm water the unit can administer per hour together it is gift used. It tells you how easily the water heater have the right to recover (aka refill) with cold water and also heat it up.

A unit with a high recovery price will administer hot water faster since it takes less time to warm it up. So even if you’re utilizing a lot of of warm water at once, a water heater with a high recovery price will have the ability to heat the just arrive cold water quickly.

Power Source

A water heater’s power source (gas or electricity) has a lot to execute with how long it takes to heat water up. Electrical water heaters are recognized to take much longer to warm water. This is because it’s less reliable to use electrical heating aspects than gas burners.

Your median 50-gallon gas water heater might have a FHD price of 80 come 90 GPH, however a 50-gallon electric water heater will have actually a FHD price of about 58 to 66 GPH.

While you can have to wait around 30 minutes because that an median gas water heater to warm all the water in the tank, you’ll have to wait twice that lengthy for an electric model.

Water Heater Type

Storage water heaters are those through tanks that hold and heat water. Tankless water heaters don’t have storage tanks and also heat the water right before it comes out of the tap.

There’s a huge difference in exactly how long that takes this two types to warmth water.A warehouse water heater takes almost everywhere from 30 minute up to about an hour and a half to heat up.

A tankless water heater normally makes hot water available instantly. If as well much hot water is being provided at once, the circulation rate (in gallons per minute) will drop, but the water that does come out will certainly still be hot.

Read Next: best Tankless Water Heaters

Water Heater Size

A warehouse water heater’s size, or gallon capacity, has a many to execute with how conveniently it deserve to heat water. Typically, warehouse water heaters have the right to hold everywhere from around 30 to 80 gallons the water.

Smaller tanks warm water quicker (and operation out of hot water faster) since there space fewer gallons come heat. This is similar to heating water in a tiny 2-qt. Saucepan on the cooktop versus a complete 12-qt. Stock pot.

The water in the saucepan will boil faster.But larger tanks don’t take as long to warm up as you can think. Bigger electrical models have actually two heating aspects to assist the process along.

Large capacity gas water heaters have actually a larger gas burner to aid them warm up quicker.Still, if you have a 30-gallon volume water heater, you won’t wait as lengthy for the to warmth up together if you had a 50 or 80-gallon unit.

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Original Water Temperature

The original water temperature has a lot of to do with exactly how long it takes because that a unit to warm it up. If the inlet water temperature is low, the water heater have to work harder come raise the water come the temperature you’ve chosen.

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In colder climates, the inlet water temperature is usually about 40 degrees Fahrenheit. In warmer climates, it’s around 50 degrees. The water heater takes time to heat water native 40-50 degrees up to 140 degrees.