9800 Old Dogwood Rd.
Roswell, GA 30075
(770) 667-6937

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Local Reviews
for kennesaw, ga

Rated 5.0 out of 5 stars based on 459 customer reviews

Excellent service and very professional!

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Fantastic work.

Fast and professional

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Knowledgeable and Efficient

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Excellent Service

Albert arrived as scheduled, performed the services, thoroughly explained his findings and answered all my questions. I am very pleased with the work performed.

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Great understandable friendly

Great communication. Also offered to come back and speak with my spouse for helping us make a decision.

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Very programs excellent service!

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Job well done!

Repeat customers, and once again Andrew was a complete professional, and a pleasure to have in our house. The work wasn’t easy - pulling new lines from the basement to the attic, or the equivalent of 3 stories - without cutting any holes in existing Sheetrock. The work was done quickly and thoroughly cleaned up afterward. Excellent job!

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Fast, reliable, knowledgeable and friendly service!

Jeremy is a great techniciation! Got the issue resolved quickly and help troubleshoot some possible future issues!

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Excellent Work!

Will and Dakota were excellent! Friendly, super knowledgeable and professional. I highly recommend!

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Excellent !!

A great and professional job! Well done. I will be back when needed.

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Outstanding job

Outstanding job by Albert. Identified several issues with one of my HVAC systems and repaired it before it caused serious damage. Extremely friendly and knowledgeable

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Great service as always!

I can always count on my experience with TE Certified to be top notch. From customer service reaching out to remind me to schedule, to the HVAC technician Brian who visited us. He was fast, efficient and helpful when answering my questions. We’d gladly welcome him in our home for service again.

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Marvelous service!

Mr. Newman was wonderful. I’ll be sharing him with friends.

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Nice Work

Arrived on time, quickly found the problem and gave us different options for the repair.

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Prompt and Professional

I had the pleasure of having Andrew out to my house on Saturday to diagnose and fix what we expected to be, faulty smoke detectors. We discovered it was something entirely different and got a good chuckle out of the end situation. I was thankful Andrew was one of those “think outside the box” kind of people and welcomed my collaboration in getting to the root cause of the beeping we were hearing. End result was much needed replacement and upgraded smoke detectors and a fix on my security system power supply which I fussed with in trying to determine if that was the initial issue. Andrew was professional, knowledgeable and easy going. He was exactly what I needed during a stressful situation. Thank you Andrew and TE Certified. Your techs always Rock!

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Job Locations
for kennesaw, ga

Allen M.

Allen M. Job Checkin

Customer had a leaking condensate drain on their tankless. After running through diagnostics on the unit we found some deficiencies. The gas line was undersized, condensation drain had brass fittings, the heat exchanger was extremely filled with soot and other debris, and the unit was 13 years old with no maintenance history. We recommended replacing and gave options. Customer decided to have us install a new 50 gal power vent water heater. We installed with all code upgrades and new gas fittings. Restored water and tested for leaks and proper function.


Blake T.

Blake T. Job Checkin

Replace section of 1/2 pipe that had a pin hole leak and replace the pressure regulator


Chad A.

Chad A. Job Checkin

We were called out for water on the floor near tankless. Water had dried up by the time we arrived, but it appears that condensate line had frozen and overflowed. We also found that the thermal expansion tank had failed. We installed a condensate pump, and upsized condensation drain to 1” in an attempt to cut down on the possibility of the condensate drain freezing. We also replaced thermal expansion tank and replaced a swing check valve with a more reliable spring check. We I stalled an ion 6 water conditioner, so the unit will only require being flushed once every 4 years. We flushed the unit as a courtesy while onsite.


Cody S.

Cody S. Job Checkin

Installed a new back to back outdoor outlet surface mounted on the front of the home.


Elliott F.

Elliott F. Job Checkin

Today we came out for upstairs furnace not working all the time 10 year old Goodman 60k with matching 3 ton ac. Found high limit switch opening due to improper ductwork. From furnace over heating heat exchanger has been compromised found severe metal fatigue and hot spots. There is not enough return air, filter is 16X20 when it should be 16X25 and return plenum is too small. Client also has duct board fiberglass plenums which is not healthy and needs to be updated to sheet metal plenums. House calls for 3.8 tons of air and client currently has 5.5 tons of air. When equipment is oversized we do not get enough round time and we cannot properly dehumidify. When this happens biological growth and mold can grow. Gas piping going to furnace in attic is not up to current code sediment trap was installed wrong. Scheduled install supervisor and airflow specialist to give options on updating second level system, replacing duct board plenums and modifying ductwork. Left all equipment operational.


Lexx M.

Lexx M. Job Checkin

During our visit, the customer mentioned he noticed rusty water coming from the hot side of every fixture. Upon inspection, I noticed the water heater was 13 years old. Multiple estimates were provided and presented to the customer. An estimate was approved for replacing the water heater. A new 40 gallon gas water heater was installed in the garage. An anode warranty extension kit was installed to extend the manufacturer warranty to a total of 10 years. A new pressure reducing valve and main shutoff valve were also installed. A drain pan was added along with a drain pipe down to the garage floor. These repairs were tested for leaks and functionality after completion. Thanks for choosing Te Certified!!!


Leeann W.

Leeann W. Job Checkin

Tech was for system not heating properly. Tech checked system out and found dirty filter. This is causing system to trip the high limit switch. Replaced filter tested furnace. Let customer know that it’s time to start thinking about getting her ducts cleaned. This will help with filter staying clean. Also spoke with customer about installing a Uv light in hvac system.


Michael U.

Michael U. Job Checkin

For this job, I did a plumbing inspection, however, this is an active dentist office during business hours, so I was not able to shut the water off and isolate the main service so this ended up being a purely visual inspection, on the pipes in the crawlspace, underneath the building for the owner. The owner just had some plumbing work done recently, and wanted me to check the integrity of the work. Everything looked good, thoughI did notice old pinhole leaks on some of the copper supply pipe in the crawlspace, along with some corrosion due to the age of the copper pipe. Also there was some moisture on top of the packing nut for the main shut off, there was no drip visible, but I did tighten the nut.


Cody S.

Cody S. Job Checkin

Replaced the women’s bathroom exhaust fan with a new builder grade quality bath fan, the new bath fan was working properly once completed.


Joshua R.

Joshua R. Job Checkin

For this job, I worked on and replacing a 50 gallon, Aosmith water heater. With a Rheem 50 gallon gas 10 year warranty water heater that has an extra anode rode. Old water heater was rusted from the bottom of the unit. Replaced up to 18 inches of copper and expansion tank. Went ahead check for leaks and cleaned up area.


Andrew P.

Andrew P. Job Checkin

Today, customer called us out to her home because she had no power to her study. During my troubleshoot, I found that there was a bad breaker that controlled the study. So today we replaced the bad tandem breaker. We also installed a whole house surge protector.


Luis M.

Luis M. Job Checkin

Job complete 100%


Liam B.

Liam B. Job Checkin

Electrical panel replacement


Joaquin P.

Joaquin P. Job Checkin

Rewire 3 face


Brian B.

Brian B. Job Checkin

Install customer provided thermostats . Installed 2 nest new generation thermostats and helped program. Tested upon completion both working in heat and air.