★ ★ ★ ★ ★
"On time and did a thorough cleaning and testing of my heating system. Very knowledgeable and explained everything regarding my thermostat. Friendly and professional looking forward to seeing him on our winter maintenance. "
— Joe D.
(Google Review)
★ ★ ★ ★ ★
"I had an excellent experience with Hartman Brothers from start to finish. After dealing with an incomplete and frustrating repair from Peterman Brothers, Hartman Brothers was a breath of fresh air. Their technician spent several hours thoroughly troubleshooting my tankless water heater, walking through the issues clearly and professionally. There was no upselling, no pressure, and no shortcuts—just honest, methodical work.
Based on their findings, I chose to upgrade to a new tankless water heater, and the decision was entirely mine. At no point did they try to push a sale or steer me toward anything unnecessary. The installation was clean, the communication was excellent, and the entire process felt transparent and trustworthy.
It’s clear why they have such a strong reputation in the Fort Wayne area. Their professionalism, responsiveness, and genuine customer‑first approach really stand out. I’m very happy with the new system and with the service I received.
"
— Cory T.
(Google Review)
★ ★ ★ ★ ★
"Great service. Was able to squeeze in appointment before Christmas for service, but found heat exchanger crack. Thankfully, are still able to do Christmas Eve and guests will be warm and comfortable . Thanks for your great service"
— John P.
(Google Review)
★ ★ ★ ★ ★
"The technician was very knowledgeable and efficient. This was the most thorough service my furnace has ever had."
— Jim H.
(Google Review)
★ ★ ★ ★ ★
"Just had a complete system put in - Duct Work, A/C and Furnace. These guys are amazing, they clean up as they go and so knowledgeable and very efficient. Highly Recommended!! Thank you Rick, Darren Brandon and Brad - You guys Rock!!"
— Lisa B.
(Google Review)
★ ★ ★ ★ ★
"Very thorough with my furnace and very knowledgeable."
— Ruth P.
(Google Review)
★ ★ ★ ★ ★
"I had an issue with my furnace, the technician responded timely to my home and quickly assessed the problem and fixed it. The technician was very courteous and helpful. I will definitely use this company again. 10/10"
— Roy C.
(Google Review)
★ ★ ★ ★ ★
"Hartman Brothers service technician was very professional and did an excellent job! I trust Hartman Brothers with my heating and air conditioning needs!"
— Vicky B.
(Google Review)
Today's ductwork design principles correct thermal losses, pressure imbalances and other errors that waste energy. In the past, design and fabrication of ducts were done with the aim of minimizing costs. If you're looking to improve your home's efficiency and comfort, you should be aware of the principles of modern ductwork design below.
