Need a new storage tank water heater? You may be wondering, “What water heater size do I need?”
Great question (and an important one, too).
A tank that’s too large will run up your energy bills. And one that’s too small will run out out of hot water too quickly, leaving you in a deep freeze during shower time.
So, just like Goldilocks and the three bears, you want to get the size that’s just right.
To do that, do these 2 things:
It’s just like shopping for shoes. Measure your foot size; find the shoe that fits. Simple!
First, think about the time of day you’re using the most hot water in 1 hour. It’s usually the morning or evening. This is your “peak hour demand.”
Next, estimate how much water you use in that 1-hour period. To do that, use this worksheet from the U.S Department of Energy.
For example, let’s say your highest demand of hot water is in the morning from 6:30 to 7:30. Three people take a shower and 2 people shave. Using this worksheet, you figure out the peak hour demand like this:
That means you need a tank size that can give you at least 34 gallons of hot water within that 1 hour. (And maybe more than 34 gallons in case you have guests.)
OK, so the foot has been measured. Time to find the shoe that fits.
First hour rating (FHR) measures how much hot water a water heater supplies in 1 hour assuming that the entire tank is full of hot water.
Finding this is simple: look on the top left corner of the water heater’s yellow Energyguide label. Or, if you’re shopping online, look in the product details.
Here’s an example:
This electric water heater has a capacity (1st hour rating) of 48 gallons.
Contact us for advice on the size or type of water heater that fits your family’s needs.
Nicholson Plumbing, Heating, and Air Conditioning gladly serves Framingham, MA and MetroWest. Contact us online to learn more about our services.
Francis from Nicholson Plumbing and Heating was excellent. He was here to evaluate HVAC in our home. He was very patient and answered all my questions. He is also polite and easy to communicate with him. He explained technical concepts to me in layperson terms!
- Shelley S.
Nicholson offered what is possibly the best customer service I have dealt with in a home repair situation. I called them because I was looking to replace my very old furnace. They came out to do an initial estimate, and then came back when I had some further questions about my options. After installing the furnace, they ran into some problems with my air ducts. This happened on a Friday, and the problem was fixed by Monday afternoon. In addition to their excellent service, they did quality work at a fair price. I would recommend them to anyone looking for an HVAC company in the Framingham area!
- Melissa T.
Recently used these guys because my HVAC unit AC wasn’t working (first hot day of summer). Showed up on time, wore booties, fixed the unit. During the visit we talked about how my unit was having problems in the winter – which was resulting in NSTAR service calls of maybe 3-4 times per season (I am on a service plan with them). He was the first guy to tell me WHY the problem was happening, and HOW to fix it. I find it strange that all of the NSTAR guys etc. no one took time to point out how to fix the source of the problem…Very professional, smart. I would use them again, and plan to for the fix on my heating unit!
- Ben J.
Nicholson Plumbing, Heating and Air Conditioning is the best and most reliable source for electrical service. We are proud to be Mitsubishi Electric Diamond Elite Contractors, that have gone through extensive accreditation and training in order to provide proven high-quality service. Get in touch with us whenever you need to have electrical work done in Framingham!