What size water heater for 2 washer laundry room

5 Replies

Hi everyone!

I current have a 42 gallon water heater in the laundry room that contains 2 washers and 2 dryers. This water heater is really old and needs replacement.  At first, I planned is get a new one similar in size but a maintenance guy suggested I get a 80 gallon one "because it'll last longer".  At first, I agreed, but after he left, I noticed that a larger one might not fit. 

I cannot reach him by phone now and need the get the heater before I can talk to him again in the morning.  I don't want to go to Home Depot and buy an 80 gallon one only to have to return it later.  Should I play it safe an get a 40 gallon one? 

We have two washers and two dryers and take in about $500 per month in quarters. Would a 40 gallon water heater be enough? 

Any thoughts? Thank you in advance!

Best, 

D Tran 

Ultimately, it depends on the recovery rate of the water heater {gas or electric } and whether your washing machines are High Efficiency (HE) units.

If you have 2 HE washers, then a 40-usg tank should be ample.   If you have older, upright washers, which could use 10 usg per load, a 40 usg gas tank would be sufficient and a 40 usg electric would be fine provided it has sufficient recovery (i.e. both elements are working)

Just think ... in a typical home, folks often take a shower (2.5 usg / minute on most shower heads) and then do a load of laundry without exhausting a 40usg tank.

If you put in a larger (60 or 80 usg) tank you will be incurring larger stand-by losses keeping the additional volume of water at temperature.

Originally posted by @Roy N. :

It depend on the recovery rate of the water heater {gas or electri } and whether your washing machines are High Efficiency (HE) units.

If you have 2 HE washers, then a 40-usg tank should be ample.   If you have older, upright washers, which could use 10 usg per load, a 40 usg gas tank would be sufficient and a 40 usg electric would be fine provided it has sufficient recovery (i.e. both elements are working)

Just think ... in a typical home, folks often take a shower (2.5 usg / minute on most shower heads) and then do a load of laundry without exhausting a 40usg tank.

Thank you Roy! The washers and dryers are really old as well and will need replacing soon too. I will be replacing them probably next month so I could get the 40 gallon water heater, because I'm assuming the new washers will be more water efficient?!?!?  

Originally posted by @Diem Tran :

Thank you Roy! The washers and dryers are really old as well and will need replacing soon too. I will be replacing them probably next month so I could get the 40 gallon water heater, because I'm assuming the new washers will be more water efficient?!?!?  

 Even if your new washers are not Energy Star, or even HE units, they should be a little wiser with water consumption and, with a new 40usg heater you will be fine.   We had 3 washers on a 40usg heater (gas) in a common laundry room before we moved to en-suite laundry.