It can be thrilling to renovate your home by installing a new water heater, which will give you better efficiency and a more consistent supply of hot water. When purchasing a new water heater, one frequent query is, “How long does it take for a new water heater to heat up?”

In order to give you a better idea of what to anticipate after installation, we will examine the heating procedure of a new water heater in this article as well as the variables that affect its heating time.

The Heating Time Is Affected By:

Water heater type:

The heating time is greatly influenced by the type of water heater you select. Traditional tank water heaters heat and store a fixed amount of water, which initially may take longer to heat up. In contrast, tankless water heaters heat water as it is needed, eliminating the requirement for storage and waiting time.

how long for new water heater to heat up

Tank Volume:

The amount of the tank capacity directly affects the heating time for tank water heaters. While smaller tanks might achieve the appropriate temperature more quickly, larger tanks may take longer to heat the total volume of water. For homes with higher hot water demands, the tank capacity is an important factor.

Initial Water Incoming Temperature:

The water temperature entering your new water heater also influences how long it takes to heat up. The water heater will take longer to reach the target temperature in colder climates where the incoming water temperature is lower. Due of the greater initial water temperature, warmer areas could see faster heating times.

Power rating and energy source:

Your water heater’s power rating and energy source have a big impact on how long it takes to heat up. Compared to gas or propane heaters, electric water heaters typically take longer to heat up. A heater with a greater power rating can also produce more heat, which speeds up the heating process.

Efficacy of Insulation and Energy:

The length of time it takes to heat up your new water heater depends on its amount of insulation and overall energy efficiency. In addition to lowering standby heat loss and providing quicker recovery times between hot water usage, well-insulated water heaters may more efficiently store heat.
New Water Heaters’ Predicted Heating Time:

While the above-mentioned variables can affect how long it takes a new water heater to heat up, we can offer a broad estimate:

Tank-style water heaters:

It can take a standard tank water heater anywhere between 30 minutes and an hour or more to thoroughly heat up. The tank’s capacity, the initial water temperature, the energy source, and the power rating all affect how long it takes.

Water heaters without tanks:

Instant hot water is a common feature of tankless water heaters. However, because water must travel via pipes from the heater to the place of usage, there may be a brief delay of a few seconds to a minute before hot water arrives at the faucet.


The type of heater, tank size, initial water temperature, energy source, and power rating all affect how long it takes for a new water heater to heat up. While tankless water heaters provide rapid hot water with a brief delay of a few seconds to a minute, traditional tank water heaters may take up to an hour or more to heat up completely.

After installing a new water heater in your home, it’s critical to take these things into account and establish reasonable expectations. Your water heater’s efficiency and heating performance can also be increased with regular maintenance such tank flushing and insulation upkeep.

Your new water heater will give you a consistent and effective supply of hot water for many years to come if you take good care of it.