Are friend wondering, “how lengthy does it takes because that a water heater to heat up?” find no much longer — our finish guide prize this question and also much more. Check out on to discover all you should know.

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Now the you’ve watched that water heaters have the right to take almost everywhere from about fifty percent an hour up to much more than 2 hours to warm up, let’s look in ~ the components that impact how lengthy it takes.

First-Hour distribution Rate

All water heaters have actually a first-hour shipment (FHD) rating. The FHD indicates how many gallons of warm water the heater can carry out in an hour once it is full. FHD prices are provided in gallons per hour (GPH).

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

Recovery Rate

A water heater’s recovery price is how numerous gallons of hot water the unit can carry out per hour as it is gift used. It speak you how quickly the water heater deserve to recover (aka refill) through cold water and also heat it up.

A unit through a high recovery price will provide hot water faster because it takes much less time to warmth it up. So also if you’re utilizing a lot of hot water in ~ once, a water heater with a high recovery price will have the ability to heat the just arrived cold water quickly.

Power Source

A water heater’s power source (gas or electricity) has a many to perform with just how long that takes to heat water up. Electric water heaters are well-known to take longer to heat water. This is because it’s less efficient to use electric heating facets than gas burners.

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

While you might have to wait around 30 minutes for an typical gas water heater to heat all the water in the tank, you’ll have to wait double that lengthy for an electrical model.

Water Heater Type

Storage water heaters room those v tanks the hold and also heat water. Tankless water heaters don’t have storage tanks and also heat the water right prior to it comes out of the tap.

There’s a vast difference in exactly how long it takes this two types to warm water.A warehouse water heater takes almost everywhere from 30 minutes up to around an hour and also a half to heat up.

A tankless water heater typically makes hot water obtainable instantly. If too much warm water is being provided at once, the flow rate (in gallons every minute) will certainly drop, yet the water that does come out will still it is in hot.

Read Next: finest Tankless Water Heaters

Water Heater Size

A warehouse water heater’s size, or gallon capacity, has a lot of to perform with how conveniently it deserve to heat water. Typically, warehouse water heaters can hold anywhere from around 30 come 80 gallons the water.

Smaller tanks heat water much faster (and operation out of warm water faster) since there space fewer gallons come heat. This is as with heating water in a small 2-qt. Saucepan top top the range versus a complete 12-qt. Share pot.

The water in the saucepan will certainly boil faster.But bigger tanks don’t take it as lengthy to warmth up together you might think. Bigger electric models have actually two heating facets to assist the procedure along.

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

Read Next: Best tiny Water Heaters

Original Water Temperature

The original water temperature has a lot of to execute with just how long the takes because that a unit to heat it up. If the inlet water temperature is low, the water heater must work harder come raise the water to the temperature did you do it chosen.

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