The options you need to start saving now
In multiple-unit dwellings such as high-rise apartments, the most common
hot water solution is a storage water heater, sometimes linked with
additional storage tanks.
With the right mixture of heating and storage, this system can provide
continuous hot water during peak demand times and can replenish itself
when demand drops off.
Because the hot water is stored for future use, the BTU ratings can be
kept relatively low that saves money because both the gas pipe and the
actual tank size can be minimized.
This type of system is also popular in commercial settings where large
amounts of hot water are needed for a manufacturing process, shower or
Choosing the right equipment for you
All methods of heating water have advantages and disadvantages,
depending on each unique situation. Some commercial properties with
small requirements for hot water use a residential water heater to
satisfy their needs.
In situations where large amounts of hot water are needed for a
commercial or industrial application, it makes sense to piggy back onto
the existing heating system, such as a boiler, for supplementary hot
Because the boiler is already in place, the capital costs of installing
the domestic water system are relatively low. All that is needed is an
extra loop from the existing boiler to a storage tank that would deliver
water for cleaning, hand washing and other day-to-day activities.
The only disadvantage to this type of supplementary system is that the
main boiler must be on at all times to heat the water.
That’s why this system is best used where there is a large demand for
hot water in the facility that keeps the boiler going year round.
Tankless water heaters
Tankless water heaters are designed to deliver a fixed amount of hot
water to a specific location almost instantly. They use very little room
because there is no storage tank to fill, which also makes them very
There are no standby losses as the water sits in the tank waiting to be
When demanded, water travels from the heater to the outlet. Although
there is a short warm-up time, the hot water is delivered almost
immediately. More importantly, it only heats what is needed when it is
Tankless water heaters are not designed to deliver large volumes of hot
water, but in specific situations, they could be an ideal solution.
Booster water heating
One of the specialized uses of hot water is to “boost” the rinse
temperature in a dishwasher from 60° to 82°C (140° to 180°F).
Sometimes a commercial laundry requires hotter water for specific
cleaning situations. Natural gas equipment provides a variety of
solutions for boosting water temperature.
Booster heater designs include:
Storage tank-type water heaters
Tankless or instantaneous units
Boiler-type water heaters with
small built-in storage tank, and units integrated with the ware
When selecting a natural gas booster heater, features to be considered
Burner input size and burner types
- conventional and infrared
Energy efficiencies - conventional
Hot water delivery capacities at
required temperature rise storage capacities, and venting