
| Fuel Type: | Natural Gas |
|---|---|
| Boiler Type: | Standard |
| Efficiency: | 84% |
| System Type: | Hydronic (Water) |
| Width (Inches): | 13" |
| Height (Inches): | 28.375" |
| Features: | EI/Spark Ignition Power Vent |
| Application: | Heating |
| Depth (Inches): | 23-1/4" |
| Vent Size: | 5" |
| Vent Type: | Stainless Steel |
| Water Connection: | 1" |
| Gas Connection: | 1/2" |
| BTU Input: | 100000 |
| BTU Output: | 74000 |
| Warranty: | Limited Lifetime on Cast Iron Sections/1 Year on Parts |

Replacement Parts
SKU: 381-355-046
Brand: Weil-McLain
If you have steam heat, you need to size your boiler based on the amount of radiator that you have. A boiler that is too small will not get steam to some of the radiators.
The answer is "It Depends." I am in a 40 year old house in northern NJ and it has a 100K btu boiler. Right now it is a "little" oversided but OK based on heat loss calcs. I am upgrading the insulation and sealing walls and it will soon be very oversized. The only way to know the right size boiler is to run a Manual J load calculation for your house AND your location. The same house in different parts of the world will need vastly different equipment. If you go to the ACCA website they have an abridged form J (excel file). With that, go to your local library find the ACCA Manual J and with data in hand you can figure out the right ballpark size within reason.
We do not sell venting supplies for the CGI-4 boiler.