
| Fuel Type: | Propane Natural Gas |
|---|---|
| Boiler Type: | High Efficiency |
| Application: | Heating |
| BTU Input: | 175000 |
| BTU Output: | 133000 |
| Capacity (Gallons): | 6 |
| System Type: | Hydronic (Water) |
| Water Connection: | 1" |
| Gas Connection: | 1/2" |
| Vent Size: | 3" |
| Efficiency: | 87% |
| Features: | EI/Spark Ignition Direct Vent |
| Length (Inches): | 37-3/4" |
| Weight (lbs): | 410 lbs |
| Width (Inches): | 17-5/8" |
| Warranty: | Limited Lifetime on Cast Iron Sections/1 Year on Parts |
| Height (Inches): | 29.75" |

Replacement Parts
SKU: 382-200-507
Brand: Weil-McLain
According to the manufacturer, CG boilers were first produced in 1967. The CG would have been around 80% efficient back then. GV boilers are 87% efficient. The net output of a CGM-6 was 104,300 BTUH. The GV-6 net output is 133,000 BTUHnet. The GV-5 net output is 105,000 BTUH, which is closer to the CGM-6.
Yes, the GV-6 would work, it is similar to the HE series but an updated model. Installation can get complicated so you should consult your installer on how to properly connect the boiler to the different zones.