Main Services: Heating and Cooling for Residential and Commercial

Description: Washington, DC Heating, Cooling And Solar Energy

Washington Metropolitan Area

Long Engineering

Looking to go green so you can save some green? Well look no further then Long Engineering - we are the premiere full green HVAC and solar service company in the Greater Washington - Baltimore region.

Installation and repairs for all brands and models
No matter what type of heating or cooling unit you have - boiler, furnace, heat-pumps or air conditioning system - you will receive the best green technology and energy management systems.

Let Long Engineering reduce your energy cost

Heating - Keeping your family or business nice and warm during the cool months
Cooling - Reduce your carbon footprint with energy efficient units
Commercial Refrigeration - Cost efficient retrofits for the life cycle of your unit
Energy Audits and Green Technology - Save energy, save money, save the environment and go green

Offering you the finest brands in solar, heating and air conditioning
No matter if you want to improve your indoor air quality or reduce your energy usage and energy cost - Long Engineering is here for commercial, industrial and residential customer.

Give Long Engineering a call today at 202-657-7978 or 240-508-0939 to schedule your appointment.

Service Area: Davidsonville, Ellicott City, Deale, Andrews Air Force Base, Southern Md Facility, Beltsville, Olney, Jessup, Burtonsville, Rockville, Churchton, Glenn Dale, Elkridge, Tracys Landing, Fort Meade, Chevy Chase, Brinklow, Hanover, Clarksville, Harwood, Bowie, Lanham, Upper Marlboro, Severna Park, Glenwood, Silver Spring, Capitol Heights, Garrett Park, Highland, Gwynn Oak

What sets us apart from other contractors: Over 40 yrs experience. We access the full issue and advise as the homeowner will have long lasting quality work.

We are best known for: We are best known for our quality of work and our professionalism.

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35 Reviews

Review Me

Revondra Lanham MD

Overall

Work Description: Central A/C - Repair/Service

Sandy Fort Washington MD

Overall

Work Description: Boiler problem

Comments: Unreliable and unprofessional

Stephen james Silver Spring MD

Overall

Work Description: Furnace/Heating System - Repair/Service

Thomas Halethorpe MD

Overall

Work Description: Central A/C - Repair/Service

Comments: He was very honest ,got the job done ,very pleased

John F Bowie MD

Overall

Work Description: Furnace/Heating System - Repair/Service

Michael Laurel MD

Overall

Work Description: Central A/C - Repair/Service

Comments: Initially reluctant, only because I've never heard of his company. It goes to show you, "never judge a book by it's cover". He was knowledgeable and transparent about what the needs were. In other words we felt he was honest, and we also felt he was not overly expensive like the big mom and pop places.

Rita Annapolis MD

Overall

Work Description: Central A/C - Repair/Service

Comments: The HVAC work was very thorough and professional. There were points at which the work required great patience and persistence, but Mr. Long worked through the problems determined to do a great job.

Terrance Columbia MD

Overall

Work Description: Central A/C - Repair/Service

Comments: Quickly responded to the HVAC problem.
Replaced a run capacitor that temporarily solved the problem on a very col day.

Maria Hyattsville MD

Overall

Work Description: Furnace/Heating System - Repair/Service

Comments: If I knew what I did today, I would have went on networx.com yesterday.
Long Engineering fix my problem.
Thank you and may God bless 🙏

Kenrick Lanham MD

Overall

Work Description: Central A/C - Repair/Service

Grace Silver Spring MD

Overall

Work Description: Central A/C - Repair/Service

sendu Lanham MD

Overall

Work Description: Thermostat - Install/Replace

Comments: Great job done on my HVAC system

Jithin Upper Marlboro MD

Overall

Work Description: Central A/C - Repair/Service

Michele Arnold MD

Overall

Work Description: Central A/C - Repair/Service

Jerry Clinton MD

Overall

Work Description: Central A/C - Repair/Service

Comments: I was very pleased with the service I received from Long Engineering. The technician displayed knowledge and promptness in handling the service call. His recommendations explained with clarity and integrity. I was more than pleased with the service call. I will highly recommend the company to all my friends and family.

Claudia Annette Upper Marlboro MD

Overall

Work Description: Central A/C - Repair/Service

Comments: He's very knowledgeable and professional. I'm very pleased with his work!

Rick Temple Hills MD

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Quality

Price

Punctuality

Work Description: Handyman

Comments: I've never experienced anything this bad. The most arrogant owner( John Long). Switch and bait ($800 to install a doorbell,$1000 to install a dryer vent).

Could not install 2 door knob, Installed a porch light and the fixture was to low to be able to open the door. Damien said he would be back yesterday. A no show. I called him and left a VM. Nothing.
Awful experience.

Marc Columbia MD

Overall

Quality

Price

Punctuality

Work Description: Furnace/Heating System - Repair/Service

Comments: Very nice man, job may have been a bit more than he expected, took three days to complete, up and running well and looks professionally done

Wanda F Capitol Heights MD

Overall

Work Description: Furnace/Heating System - Repair/Service

Comments: I am very satisfied with the services provided and would be happy to recommend

geraldine Hyattsville MD

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Quality

Price

Punctuality

Work Description: Furnace/Heating System - Repair/Service

Comments: I am very pleased with the service i received

Erik Capitol Heights MD

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Quality

Price

Punctuality

Work Description: Hvac malfunction

Comments: My heat wasnt working on the top floor of my house. No air. I called john and he came over to take a look. After an hour of diagnosing he said the motherboard was bad. He came back a week later and replaced the mother board. Still no air on top floor of my house. His response was dont worry, the heat will level off in a day and your system is designed incorrectly. After a week of it still not working, i gave up and called tnt hvac. Vincent came over and within 20 minutes he determined it was a malfunctioning flapper valve to the upstairs. He came back a few days later and replaced the flapper valve for a quarter of the price john charged me to replace a workkng part. My heat works fine on the top floor now. I do not recommend john unless youre rich and want to donate time and money to him.

Eric's first complaint was that his unit was working like it had a mind of its own. I checked the motherboard. It was visibly bad. The silicone had blistered. I changed out the board, checked operation with owner had no complaints at this time. He called me back the next day I showed him that his thermostats were working The upstairs thermostat was set at 72 and it was 72degrees. There is no flapper.Flappers are in toilets.

Antonio Lanham MD

Overall

Work Description: Gas Furnace - Repair

Comments: Did a good job and provided a timely estimate.

Siva Baltimore MD

Overall

Work Description: Furnace/Heating System - Repair/Service

Comments: John was very punctual and gave a good course of action for the problem at hand.

cheryl p Capitol Heights MD

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Quality

Price

Punctuality

Work Description: Furnace/Heating System - Repair/Service

Charlene Washington DC

Overall

Quality

Price

Punctuality

Work Description: Thermostat - Install/Replace

Carl Washington DC

Overall

Quality

Price

Punctuality

Work Description: Central A/C - Repair/Service

Comments: i could not have found anyone better; excellent job.

MICHAEL Baltimore MD

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Quality

Price

Punctuality

Work Description: Central A/C - Repair/Service

V Jessup MD

Overall

Work Description: Heat Pump Repair

Comments: The technician ordered the part and due to install within the next day or two

Fabiola Washington DC

Overall

Quality

Price

Punctuality

Work Description: Central A/C - Repair/Service

Comments: Awesome job! Reliable and professional. Mr. John and his assistant did a great job repairing my AC unit. No doubt that will hire them in the future.

Mafiz Potomac MD

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Quality

Price

Punctuality

Work Description: Central A/C - Repair/Service

Comments: Mr. Long was very professional and honest. I found him very knowledgeable, customer oriented, posses excellent trouble shooting skills, provided options to choose from which is very rare in this filed, affordable and save me a lots of money. His help is highly appreciated and I will definitely refer him to my neighbors.

Thanks
Mafiz Chowdhury

Tania Washington DC

Overall

Quality

Price

Punctuality

Work Description: Central A/C - Repair/Service

Comments: Mr. John and his assistant showed up late. They said they were going to return the next day, and I didn’t hear from them. I had to call them, and Mr. John said ‘he’ was glad I called him, no explanation for why he didn’t show up when he said he was returning.
The following day , he agreed to return, however, he didn’t provide a time or window,.
Mr. John is a nice man, however communication and punctuality is not his strong suit.

tia Essex MD

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Quality

Price

Punctuality

Work Description: Central A/C - Repair/Service

Comments: Solve issue in a timely manner.

Lou Baltimore MD

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Quality

Price

Punctuality

Work Description: Central A/C - Repair/Service

Comments: He was a bit behind schedule getting here, but once on the site he took care of business efficiently. The acid test will be whether the units work properly once they are reconnected after the roof replacement.

Brooke Halethorpe MD

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Quality

Price

Punctuality

Work Description: Central A/C - Repair/Service

Comments: No issues. Tech was honest and didn't try to upsell. I'm happy.

irv Greenbelt MD

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Quality

Price

Punctuality

Work Description: Serviced commercial ac unit.

Comments: Excellent work. Would recommend

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Bowie, MD 20720
Website
13 Years in business
License HVAC/R License in MD :
#9724
HVAC License in DC :
#RM300242
MD HVAC/HIC in MD :
#9724
Business Highlights: Financing Options
Maintaining Distance
No-contact Payments
Protective Gear Used
Trip Charge