★ ★ ★ ★ ★
"The service was great as always. The 2 men who came to install my new furnace were very professional and took the time to explain what they were doing and showed me what the problem was with my old furnace. Thanks Mr Hartman for coming up North and for having a great crew."
— Sandra Mott
(Google Review)
★ ★ ★ ★ ★
"Josh was very knowledgeable! He was able to find the problem with our furnace and fix it. He was not pushy and didn't try to sell us anything we didn't need! We will definitely do business with Hartman's again when needed!"
— Brian Trumbower
(Google Review)
★ ★ ★ ★ ★
"As always, Hartman Bros does service RIGHT! They are prompt, courteous, professional, clean and fairly priced for all services we've ever had completed. We were introduced to them in 1998 when we first used their services and have been faithfully returning for every Heating and Air need, including the building of 2 new homes. They are stellar performers providing excellence at a time when mediocrity has been touted as the norm in our society. They go well above and beyond in all they do."
— Sheila Skinner
(Google Review)
★ ★ ★ ★ ★
"Ked was excellent, friendly from the start and extremely helpful. Because of how thorough he was, he fixed the problem but also discovered another potential problem and promptly fixed it as well."
— Casey Holt
(Google Review)
★ ★ ★ ★ ★
"Love these people! We bought a brand new furnace and ac a year ago. For some crazy reason something happened to the ac Sunday when it was 91 degrees . I had a service guy here Sunday and Monday... Vicky was fabulous through it all and the guys were wonderful. They ended up working after hours and got it all fixed... Thank you from the bottom of my heart and my puppies. We're cool again!!"
— Fonda M Jones-Soards
(Facebook Review)
★ ★ ★ ★ ★
"Everything was competed as expected and my satisfaction. The service representative could have even arrived earlier than scheduled if I could have accommodated the time"
— Donald M.
(Google Review)
★ ★ ★ ★ ★
"I signed up for a service plan, as I’m not much of a handyman myself. They had a variety of payment options with the service plan, so I was able to start monthly payments, which works best for me. Our service person was polite, and he explained everything in terms I had no problems understanding. I had an additional issue with an attic duct being chewed through. He got up there and got pictures right away so they could put together an estimate. Same visit, no hassle. And because of the service plan, there was no charge for the system check. I just let him in, showed him around, and he worked his magic. No regrets here. There’s a very good chance I’ll just keep up this service plan for the entire time I own my home."
— Kris B.
(Google Review)
★ ★ ★ ★ ★
"I have used Hartman Bros for many years. They offer excellent service, stand behind their products, give honest advice and are top notch professionals."
— Lisa Johnson
(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.
The average homeowner spends 20 to 30 percent more energy than necessary for cooling and heating bills due to leaky and inefficient ductwork. If you are constructing a new home or 
The 
The most advanced HVAC technology you can buy has little value when ductwork design is neglected. In the past, the layout of residential ducts was often based on a “one size fits all” philosophy. Cost-cutting, not performance and efficiency, was the priority in fabrication and installation.
Ductwork design best practices are necessary to achieve maximum energy efficiency, as well as to provide comfortable airflow with uniform temperatures throughout your home. Rather than relying on rule-of-thumb estimations, you'll want careful planning to design the best duct system for your new home or retrofit. Work closely with your 