Capable of 150-degree F water output, the 5 Series 502W12 makes upgrading to a geothermal system easier, especially when the replacement system must work with existing cast-iron or baseboard radiators, the firm says. The unit uses two high-efficiency compressors for low-cost operation while compressor blankets, double-isolation mounting plates, and a discharge muffler ensure a quiet system. It exceeds Energy Star requirements and qualifies for a 30% federal tax credit. 800.436.7283. www.waterfurnace.com.
About the Author
Jennifer Goodman is Senior Editor at BUILDER and has 17 years of experience writing about the construction industry. She lives in the walkable urban neighborhood of Silver Spring, Md. Connect with her on Twitter at @Jenn4Builder.