The BGS80 gas furnace from Bosch Thermotechnology delivers 80 percent AFUE heating efficiency while providing comfort to the homeowner and ease of installation to the contractor. It offers a compact size and four-way multipoise design, making it a suitable replacement for aging noncondensing furnaces. It can be integrated with Bosch Thermotechnology’s IDS Outdoor Units and Cased Coils for a complete heating and cooling system. 800-283-3787; www.boschheatingandcooling.com.