Deiter Bros. has been serving local Lehigh Valley Homes and Businesses for over 80 years. Our goal has always been to exceed your expectations.

We have designed this site to provide you with a wealth of information on our many products and services. We are always researching the latest technology in indoor air quality, energy efficient systems, and must have indoor comfort items.

Our heating oil is a special formulation we call EnviraFuel®. EnviraFuel® is a Cleaner, Greener Heating Oil that is blended with .

We routinely service all heating and air conditioning systems. We recommend and install Lennox systems and our own Deiter Signature Series systems.

Need service on your heating or air conditioning system?

   

Take the guesswork out of driving down your energy costs with a Deiter Bros. BPI Certified Home Energy Audit, which includes:

1. Calibrated Blower Door Test
2. Thermographic Inspection
3. Honeywell-Certified Air Sealing & Weatherization

Other great areas to browse

• Ever wonder what's inside your heating or cooling ducts?
• We have Planned Maintenance Agreements
  for all systems.
• You can Pay Your Bills or View Your Account online!
• View our list of Frequently Asked Questions.
• Buying a home? Here are some great tips...

We also have a Security Division, 4 Seasons Security. We install and service most major brands of burglar, fire, CCTV and access control systems. We are a GE authorized dealer. GE has designated us a GE Security Pro Dealer. We provide monitoring 24/7 through our state of the art monitoring center staffed with highly trained security professionals.