Since 1891, John Duffy Energy Services has been providing world-class residential and commercial services to customers throughout Newark and the northern and central parts of New Jersey.
| Saturday | Closed |
| Sunday | Closed |
| Monday | 8AM to 4:30PM |
| Tuesday | 8AM to 4:30PM |
| Wednesday | 8AM to 4:30PM |
| Thursday | 8AM to 4:30PM |
| Friday | 8AM to 4:30PM |
465 Mulberry St, Newark, NJ 07114
Great service
Good service & prices
Very Good Customer service
Helpful and quick to very fuel when you need it.
Very nice, helpful and terrific at their jobs
Never here when the landlord calls them. We have 5 familes in this building. Landlord ordered fuel on Friday. No one showed!!!
983A Stuyvesant Ave , Union. Mind you it’s been under 50° last few days…
This company was the best company I’ve ever work for.
It’s family oriented I mean familia. Miss you guys may God bless you all.
Yes I’m in Florida but my heart is still in New Jersey.
John Duffy truck backed down our driveway when it was a sheet of ice got stuck told them several times to stop trying to go back up our driveway the driver was indignant & didn’t listen the truck tore up our driveway & when we talked to the …
A person by the name of pricilla picked the line. Pricilla asked questions regarding the services I needed but was not sure if they service my area. So she transfer my call to a person named Andy. I introduce myself to Andy and I asked him …
Hi-
I used Duffy twice this year. Once for my Boiler maintenance and today for my baseboard heater. Awesome Company Awesome job !! Their technicians are highly experienced. I recommend to use Duffy ! I give them 5 Stars !!
Less than 1 star! This company is horrible! They were hired by our builder and when I contacted them for a problem we were having they sent a tech who couldn’t exactly figure out the problem. We were told we would hear back from someone but …
These guys are the best in the business and the best contractors I have ever worked with. They are very personable, get the job done quickly for the amount they quote you, and are there for you if any issues arise. I would credit the …