The Atmosphere™ Series by Regency is where timeless design meets next-generation performance. Engineered for efficiency and crafted for comfort, the Ei25, Ei29, and Ei33 gas insert models are built to transform your existing wood-burning fireplace into a high-performance, clean-burning heating solution—without compromising on style.

• Ei25 – A compact and efficient insert perfect for smaller masonry fireplaces or tighter spaces, delivering strong heat output with sleek aesthetics.

• Ei29 – A versatile mid-size model that blends seamlessly into most traditional fireplaces, offering an ideal balance of warmth, flame realism, and contemporary design.

• Ei33 – The largest in the Atmosphere™ lineup, designed for expansive fireplace openings, this insert delivers powerful heat with an ultra-wide viewing area and bold flame presentation.

All models in the Atmosphere™ Series feature Regency’s patent-pending EmberLight technology for ultra-realistic flame effects, full electronic ignition, variable speed blowers, and customizable design options to suit both classic and modern tastes.

Whether you’re upgrading for efficiency, aesthetics, or both, the Ei25, Ei29, and Ei33 make it easy to enjoy the warmth and ambiance of a beautiful fire—without the mess of wood.