CGI-7 - 140,000 BTU Output Cast Iron Boiler, Spark Ignition - Series 4 (Natural Gas)

Weil‑McLain CGI‑7 – 190 MBH Cast‑Iron Gas Boiler (84 % AFUE)

The CGI‑7 is a high-capacity, cast-iron water boiler engineered for residential and light-commercial applications. Providing a 190 MBH input and delivering 140 MBH net I=B=R output (DOE output: 162 MBH), it maintains 84 % AFUE. This compact, space-saving unit supports both natural gas and propane, and includes a low-water cutoff for added protection. Optional power-venting promotes flexible installation without requiring draft hoods or mechanical dampers :contentReference[oaicite:1]{index=1}.

???? Highlighted Features Cast-Iron Heat Exchanger Rugged construction tested to 50 PSIG; includes integrated air separator to maintain flow imechsupply.com +12 weil-mclain.com +12 afsupply.com +12 . Efficient Combustion System Spark ignition, stainless burner, and integrated controls—no draft hood or vent damper needed—simplifying servicing thegranitegroup.com +6 acwholesalers.com +6 ussupply.com +6 weil-mclain.com +4 weil-mclain.com +4 ussupply.com +4 . Insulated Jacket & Access Panels Extended insulated steel jacket minimizes heat loss; two-piece top panel and wiring harness allow quick system access weil-mclain.com +11 acwholesalers.com +11 powerequipmentdirect.com +11 . Built-in Safeties The integrated control module includes low-water cutoff, pressure/temperature gauge, and diagnostic LED indicators weil-mclain.com +2 powerequipmentdirect.com +2 weil-mclain.com +2 powerequipmentdirect.com +13 acwholesalers.com +13 afsupply.com +13 . Adaptable Venting Supports natural draft venting via 6″ chimney or optional induced-draft power venting kits powerequipmentdirect.com +1 afsupply.com +1 . Circulator Compatibility Includes Taco‑007 circulator (supplied); piping supports 1¼″ supply/return. Electrical connections are pre-arranged for easy integration weil-mclain.com +3 thegranitegroup.com +3 ecomfort.com +3 . ???? Specifications Table Specification Value Input 190 MBH DOE Output 162 MBH Net AHRI Output 140 MBH Efficiency (AFUE) 84 % Boiler Capacity 3.8 gal water content Warranty 20 yr heat exchanger / 2 yr parts Vent Size 6″ OD Dimensions (W × D × H) ~22″ × ~25¾″ × ~28⅜″ ???? Installation Takeaways Flexibility: Compact size and multiple venting options make it suitable for tight installations. Ease of Service: Front-access panels and modular control modules reduce service time. Retrofit Ready: Supports natural draft or power vent configurations; no chimney hood required. Safety and Diagnostics: Built-in low-water cutoff, Townsend-style gauges, and service LEDs streamline trouble-shooting. ✔ Contractor Summary The CGI‑7 combines solid cast-iron durability with efficient spark ignition and thoughtful serviceability. Its sealed combustion design and flexible venting make it ideal for modern hydronic systems, especially in retrofit or space-constrained installations. With its industry-standard build and straightforward setup, it’s a reliable workhorse for any heating professional’s toolkit.