Testimonial Letters

We're always getting the nicest letters from our residential customers who want to express their satisfaction and appreciation for a job well done. We have many such letters in our files, but we want to share just a few with you, below:


Joseph Frederick and Sons received a 100% (Superior) customer satisfaction rating from Delaware Valley Consumers' Checkbook magazine, a non-profit consumer information and service resource.

Just a note to tell you how happy J__ and I are with the new heater and air conditioner. The mechanics worked very hard and completed their work and clean-up in a very professional manner.

Mr. A. S., Wilmington, DE


The purpose of this letter is to let you know how pleased we are with our new heating and air conditioning systems.

Of the representatives of the six companies who were invited to submit bids, you were the most knowledgeable and, by far, the most innovative in discerning how to deal with a complex system with challenging space/location issues.

All of the people involved in the various diagnostic and installation phases, were knowledgeable, courteous and committed to quality workmanship and satisfying our needs.

This total attitude can't exist in a company if it is not also at the top, so thanks to all of you.

Mr. B___, Greenville, DE


I wanted to write a few comments to you about our new heater and baseboard. First of all, the work was done in a timely and professional manner. I don't think I've seen a crew work as rapidly or as well together as that crew did. I have to say that I was very, very pleased with the work.

I have to mention, also, that the county inspector who came out to check the heater installation said that he never has found a problem with any work that Joseph Frederick and Sons has done.

As you know, we are planning to do some more work at our house and you can be assured that we will be calling Frederick and Sons for that purpose.

Mr. H. B___, New Castle, DE


Thanks again for your expertise in air conditioning. The work was done a week earlier that we expected and we really appreciate that. We are all very pleased. Thank you, again.

Ms. J. V-S___, Wilmington, DE


It has been a real pleasure to deal with your company from the initial phone call requesting a price quotation through the final installation. The mechanics arrived on time, were extremely clean and courteous and did a very professional installation which looked great.

Based on my experience with your company, I will not hesitate to recommend them to anyone I find in need of your services. Thanks, again.

Mr. JH___, Wilmington, DE


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   © 2003 Joseph Frederick & Sons, 810 Stanton Road, Wilmington, DE 19804    (Tel) 302.994.5786    (Fax) 302.998.2401