Products We Install

Product Partners

Carrier factory authorized dealer>


Heating, air conditioning and refrigeration solutions with over 100 years of proven innovation.


Weil McLain

Offering oil-fired hot water and steam boilers for residential, commercial and institutional buildings.

Bradford White>

Bradford White

Offering a variety of water heating, combination heating and storage applications for residential and commercial applications.

Climate Master>

Climate Master

The world’s largest and most progressive manufacturer of geothermal heat pumps.

Mitsubishi (a Diamond Dealer)>

Mitsubishi (a Diamond Dealer)

Electric heating and cooling solutions for residential and commercial applications.



Offering space heating and infrared heaters to increase efficiency and reduce costs.



Offering a variety of quality sinks, bathroom, and kitchen faucets to fit your style.



Leading provider of premium bath and kitchen faucets and shower fixtures.



Stylish faucets for today’s kitchens and baths.



Quality thermostats, air cleaners, water systems, and ventilation equipment.



Smarter wi-fi thermostats that are beautifully designed, easy to use, provide comfort and savings for families and are good for our planet.



An American privately held manufacturer that produces residential and commercial water heaters and boilers, as well as heating, ventilating and air conditioning equipment.

hear from our

Just had another great experience with Ressler & Mateer. They installed units in our first house and we've continued to use them since moving to a new house. Today was the first time we've need A/C service and it was top -notch work as always. Ed is the best! He was on-time, worked quickly and gave me some good tips on keeping the unit running. When you find a company you know you can trust, you stick with them. And that's why we stick with Ressler & Mateer. — Andrew Wagner - Quarryville, PA
Emergency? Call for 24/7 Service: 717-859-2025

Ressler & Mateer

Ressler & Mateer is open and implementing safety measures to help protect our customers and employees from the spread of COVID-19.