fbpx

SIZING CALCULATOR

Commercial Tankless Water Heater Sizing Calculator

Accurate Estimates for Tailored Results.

Intellihot’s guarantee-backed sizing that is not only based upon ASPE, ASHRAE, and other applicable standards but also takes into account our proprietary real-world measurements of water usage. This is accomplished via our live database which is continuously updated with measurements and analysis from a variety of applications and regions. Intellihot is confident that your project will be sized correctly by us, if not, we will pay for any additional equipment at no charge.

This water heater size calculator will calculate the right size of a tankless water heater for your commercial facility. Tankless water heaters are maintenance-free, energy-efficient and offer unlimited hot water.  

The sizing calculator will ask you a number of questions about the temperature settings, fixtures, and occupancy rates for your property. Based on this information, it will calculate the needed equipment for your hot water system and guarantee the right size for your needs.

Commercial Tankless Water Heater Size Calculator

Less Is More

Intellihot saves money, time and space from installation to operation. Our technology gets up and running quickly and costs less to operate month after month. With all the power of alternative systems at a fraction of the size, our design makes space-hogging boilers and storage tanks totally obsolete.

Determine the maximum number of devices you want to run and their total flow rate. Then, add up their flow rates (gallons per minute). 
Determine required temperature rise. 

Make is simple and use a sizing calculator that will do the work for you. 

Sizing Example: An average shower will be between 104–106° and uses 2.6 gallons of water.

Given the variable water inflow temperature, it’s rather hard to pinpoint exactly how big a tankless hot water heater you need with out more information.  Here is a conversion calculator that will give you a comparable tankless replacement. 

Gas tankless water heaters are able to produce a larger temperature rise per gpm than electric models. Most demand water heaters are rated for a variety of inlet temperatures. Typically, a 70°F water temperature rise is possible at a flow rate of 5 gallons per minute through gas-fired demand water heaters and 2 gallons per minute through electric water heaters. Faster flow rates or cooler inlet temperatures can sometimes reduce the water temperature at the most distant faucet.

Examples:

FIXTURE

AVERAGE FLOW GPM

AVERAGE TEMP.

Tub4.0 GPM102°F
Shower2.5 – 3.0 GPM104°F
Washing Machine2.0 GPM120°F
Dishwasher1.5 GPM110°F
Kitchen Sink1.5 GPM110°F

Depending on use and fixtures this can vary.  It’s best to seek the advise of a plumbing professional to properly size your project.  Or, use a sizing calculator that will gather your project information and make recommendations based on your specific needs. 

Determine the maximum number of devices you want to run and their total flow rate. Then, add up their flow rates (gallons per minute). 
Determine required temperature rise. 

Make is simple and use a sizing calculator that will do the work for you. 

 

• water heater size calculator