This and many other products are now available for order online and pickup at the Power Equipment Direct warehouse in Bolingbrook, Illinois or at a Ferguson location near you.
Answer:
Your nearest pickup location within a 50-mile radius is automatically selected when you enter the site. To change your pickup location and see availability for other nearby locations, click the "Change Pickup Location" link on the product page or in the cart.
Answer:
Eligible items will have the Local Pickup option available both on the product page and in the cart. Select this option for all items you wish to pick up. Please note that Local Pickup can only be scheduled online at this time.
Answer:
Items are usually ready for pickup the same day the online order is placed, but this will depend on order volume and time of day. When your order is ready, you will receive an email including specific pickup instructions. Make sure to check your junk/spam folder. Orders not picked up within two business days may be canceled. You should opt to have your items shipped if you cannot pick them up promptly.
Answer:
During checkout, you will be prompted to enter the name, mobile phone number, and email address of the person who will be picking up the order. For your protection, only you or your designated pickup party may pick up your order. You will need your order confirmation and a government-issued photo ID to pick up your order.
Answer:
Not all items are available at all locations, so pickup availability will vary based on the selected store. Additionally, some items ship directly from our manufacturer partners and are not available for pickup. You can use the "Change Pickup Location" link to check for availability at nearby Local Pickup locations.
Answer:
Due to packaging, shipping costs, and other factors, some items cannot be shipped and are offered exclusively through Local Pickup.
Answer:
Credit/debit cards, Apple Pay, Google Pay, PayPal, and financing are accepted for Local Pickup orders.
Answer:
Make sure to have your order confirmation and a government-issued photo ID available when picking up your order. Check the item dimensions and ensure the items will fit in your vehicle. Bring any straps and other materials that will be needed to secure the items for transport.
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 158k BTU Gross Input, 135k BTU DOE Capacity, 117k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-6-PIN - 135K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent - High Altitude Version (7000 - 9000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 158k BTU Gross Input, 135k BTU DOE Capacity, 117k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-6-PIN - 135K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent - High Altitude Version (9000 - 10000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 190k BTU Gross Input, 162k BTU DOE Capacity, 141k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-7-PIN - 162K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent - High Altitude Version (2000 - 5000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 190k BTU Gross Input, 162k BTU DOE Capacity, 141k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-7-PIN - 162K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent - High Altitude Version (5000 - 7000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 190k BTU Gross Input, 162k BTU DOE Capacity, 141k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-7-PIN - 162K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent - High Altitude Version (7000 - 9000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 190k BTU Gross Input, 162k BTU DOE Capacity, 141k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-7-PIN - 162K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent - High Altitude Version (9000 - 10000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 222k BTU Gross Input, 189k BTU DOE Capacity, 164k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-8-PIN - 189K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent - High Altitude Version (2000 - 5000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 222k BTU Gross Input, 189k BTU DOE Capacity, 164k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-8-PIN - 189K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent - High Altitude Version (5000 - 7000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 222k BTU Gross Input, 189k BTU DOE Capacity, 164k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-8-PIN - 189K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent - High Altitude Version (7000 - 9000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 222k BTU Gross Input, 189k BTU DOE Capacity, 164k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-8-PIN - 189K BTU - 84.0% AFUE - Hot Water Gas Boiler - Power Vent - High Altitude Version (9000 - 10000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 48k BTU Gross Input, 41k BTU DOE Capacity, 36k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-25-PIL - 41K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 58k BTU Gross Input, 49k BTU DOE Capacity, 43k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-3-PIL - 49K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 190k BTU Gross Input, 162k BTU DOE Capacity, 141k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-7-PIL - 162K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 222k BTU Gross Input, 189k BTU DOE Capacity, 164k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-8-PIL - 189K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 48k BTU Gross Input, 41k BTU DOE Capacity, 36k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-25-PIL - 41K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent - High Altitude Version (2000 - 7000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 48k BTU Gross Input, 41k BTU DOE Capacity, 36k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-25-PIL - 41K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent - High Altitude Version (7000 - 10000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 58k BTU Gross Input, 49k BTU DOE Capacity, 43k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-3-PIL - 49K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent - High Altitude Version (7000 - 10000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 119k BTU Gross Input, 102k BTU DOE Capacity, 89k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-5-PIL - 102K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent - High Altitude Version (2000 - 7000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 119k BTU Gross Input, 102k BTU DOE Capacity, 89k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-5-PIL - 102K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent - High Altitude Version (7000 - 10000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 158k BTU Gross Input, 135k BTU DOE Capacity, 117k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-6-PIL - 135K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent - High Altitude Version (2000 - 7000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 158k BTU Gross Input, 135k BTU DOE Capacity, 117k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-6-PIL - 135K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent - High Altitude Version (7000 - 10000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 190k BTU Gross Input, 162k BTU DOE Capacity, 141k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-7-PIL - 162K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent - High Altitude Version (2000 - 7000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 190k BTU Gross Input, 162k BTU DOE Capacity, 141k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-7-PIL - 162K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent - High Altitude Version (7000 - 10000 ft)
Floor Mounted, Cast Iron Boiler with Single Stage Gas Valve. Ships Packaged. Ratings: 222k BTU Gross Input, 189k BTU DOE Capacity, 164k BTU Net IBR Capacity. Includes Circulator.
Free Shipping*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges map apply, see our full shipping policy for more details.
Free Lift Gate
Free Lift Gate*This product qualifies for Free Lift Gate Service. Items over 100lbs normally ship via semi-truck. Select this service if you need the product lowered to the ground curbside. To learn more about Lift Gate Service, read our shipping policy.
Factory-Direct
Weil-McLain CGi-8-PIL - 189K BTU - 84.0% AFUE - Hot Water Propane Boiler - Power Vent - High Altitude Version (2000 - 7000 ft)
Boilers at ACWholesalers
A boiler is a central heating system that uses hot water or steam, which is transported through a piping system and to radiators, to heat a home.
One advantage of choosing a residential boiler system is the even distribution of heat. Hot water and steam transfer heat more effectively than air by keeping the heat closer to the ground. Another advantage is efficiency. Boilers require less energy to heat a home than forced-air systems because hot water and steam hold heat longer than air.
Residential boilers also provide flexibility by allowing for zoning different areas of the home. This way, each zone can be kept at its own temperature, maximizing comfort and reducing energy costs for areas where additional heat isn't needed.
Choosing a Residential Boiler System
Medium
A boiler can transfer heat using hot water or steam as its medium. These mediums are not interchangeable, so it is important to know what the existing pipe system is designed for.
Fuel Type
A residential boiler system is made to use one of the following as its fuel source: natural gas, liquid propane, oil, or electricity.
Vent Type
There are three venting options for a residential boiler; direct vent, chimney vent, and power vent. Each type has a different method of removing gasses and is chosen based on the home's construction and desired efficiency of the new system.
Net I=B=R Capacity (BTU) or DOE Heating Capacity (BTU)
Steam boilers are often sized based on their Net I=B=R capacity. This BTU amount factors in piping loss, combustion efficiency, and an extra pickup factor. DOE (Department of Energy) heating capacity also factors in combustion efficiency and is commonly used to size hot water boilers.
AFUE (%)
A boiler's AFUE (Annual Fuel Utilization Efficiency) percentage describes its efficiency. The higher the percentage, the less energy is wasted and the more efficient the model is.