How We Service

How efficient and safe is your furnace ?

Satisified Customer

“My 11 year old gas furnace was not working. I got several estimates. After several different contractors gave the same conclusion that I needed a new unit, I did some research. I found on a website for NATE as a local certified contractor. After dealing with Joseph, I can’t say enough positive things. He is extremely honest, reliable, knowledgeable and conscientious. I am very skeptical about hiring contractors of any sort because of being let down in the past. After checking many references and questioning everything, I hired Scientific Air. I feel I got better equipment for the money and I am extremely satisfied.”
—Joel DuBois in Mechanicsburg

Typical Lifespan for Furnaces

I recollect finding failed heat exchangers in furnaces from Arcoaire, Carrier, Comfortmaker, Heil, Janitrol, Rheem, Ruud, Trane, Weather King, and York. Most of them were 12 to 20 years old; that’s the typical lifespan for today’s higher efficiency units.

Every furnace should receive an annual safety check by a qualified technician. In most cases, the unit will require an inexpensive cleaning and tune-up.


Gas Furnace Risks

Can your gas furnace put your family at risk?

Heat Exchanger Near Fire

Although not very common, a gas furnace that seems to be working fine can put your family at risk. If a heat exchanger develops a hole or crack, the hot exhaust might escape, possibly causing fire or carbon monoxide poisoning.

Does your home have this type of gas piping?

CSST Tubing

Corrugated Stainless Steel Tubing (CSST), flexible piping used for distribution of gas in residential and commercial buildings, has a good record for safety, with one exception, a lightning strike. Don’t wait for the next thunderstorm.

If lightning strikes near the home or business, a spark (known technically as an arc) can jump between the CSST and an adjacent metal surface. The heat of the arc can perforate the CSST, instantly sparking a fire.

 Is there a way to significantly reduce this risk?

Yes, it’s called bonding. By bonding together the gas piping, copper water piping, electrical service, and metal ductwork, the possibility of an arc is virtually eliminated. All major CSST manufacturers now require bonding.

Is bonding expensive?

Bonding a CSST gas piping system is usually simple and inexpensive.  

AFUE Ratings Chart

How much can you typically save by replacing an old, inefficient furnace with a properly sized modern unit?

It depends on how efficient the new furnace is and how inefficient the old one was. AFUE (Annual Fuel Utilization Efficiency) ratings will tell you how much energy is being converted to heat. Read More.


"We've called Scientific A/C twice, once because we had no hot water and once because our A/C stopped working. Both times Joseph came the same day and fixed the problem. He also installed a different type of filter. Now the house is less dusty and the filter is easier for us to change. Thank you."
—Tim & Lori in Lewisberry

"Since converting from oil heat to a heat pump we're spending less on heating costs."
—Bob in Camp Hill

"Another company installed a new heat pump and then came out 3 times because our electric bills were $500 a month. They told us that's normal. I called Scientific A/C and Joe quickly diagnosed the problem as a wiring mistake and fixed it. Now it works as it should."
—Harold & Margie in Manheim

Need Help?

Thank you for your interest in our quality HVAC services. Whether you need troubleshooting, repair, replacement, or just advice, call the experts at Scientific Air Conditioning today. See how we are keeping homes comfortable and healthy in Harrisburg and surrounding areas.

Or fill out the following form and we'll call you!