- Category: Residential
- Product Type: Water
- Fuel Type: Natural Gas, Propane
- Material: Cast Aluminum
- Input MBH: 80, 105, 155, 230, 299, 310, 399 MBH
- AFUE %: up to 94.1 %
- Output MBH / Steam Sq. Ft.:
71, 94, 139, 207, 270, 289, 365 - Vent Category & Material:
Cat. 4 venting: S636 – PVC*, CPVC or AL29-4C
*Check local code / inspectors for acceptance - Warranty:
Residential
12 yr Heat Exchanger replacement / 2 yr all other parts
Commercial
10 yr Heat Exchanger replacement / 1 yr all other parts - Notes:
5 to 1 modulation, Floor or Wall mount, includes water inhibitor and boiler pump
Weil-Mclain Hot Water Boilers
Weil-Mclain Residential Boilers available in Seattle
Call for Weil-Mclain Repair or Replacement Service in Seattle (206) 281-1105
Ultra 
Evergreen 
Ideal For:
- High-efficiency installation in residential and light commercial applications
- Quick and easy installs – 10 heating system presets
- ZoneStacking with no need for extra zone panel
- Brochure — 947.44 KB
- Brochure - Commercial — 6.95 MB
- Manual (220-399) — 25.21 MB
- Manual (70-155) — 17.51 MB
- Other Downloads
- More Detailed Specs and Technical Drawings
Why Choose the Evergreen?
Residential applications
- Easy heat, effortless comfort to all areas
- Compact and floor or wall-mountable
- Up to 96.5% AFUE energy efficiency
- Durable design with a stainless steel heat exchanger
- Quick setup with 10 heating system presets
- Easy-to-use setup wizard for single and multiple boiler installation
Light commercial applications
- The above features and more…
- ZoneStacking: up to 24 programmable zones with no external panel required
- Optimal energy efficiency for up to up to 96.5% AFUE and low NOx < 20PPM certified
- Completely packaged and fired at manufacturing facility
- Common combustion air venting
- Two network and two local priorities per network boiler system
- Multiple-boiler sequencing options:
- Smart mode – maximizes part load efficiency by turning on as many boilers as possible
- Series mode – boiler goes to 100% before another is turned on; less total burner hours
- Parallel mode – hybrid mode; boilers go to base rate high before turning on next boiler
- Category: Residential
- Product Type: Water
- Fuel Type: Natural Gas, Propane
- Material: Stainless Steel
- Input MBH: 70, 110, 155, 220, 299, 399 MBH
- AFUE %: up to 96.5 %
- Output MBH / Steam Sq. Ft.:
65, 101, 143, 206, 280, 383 - Vent Category & Material:
Cat. 4 venting: S636 – PVC*, PP, CPVC or AL29-4C
*Check local code / inspectors for acceptance - Warranty:
Residential
12 yr Heat Exchanger / 5 yr parts
Commercial
10 yr Heat Exchanger / 1 yr parts - Notes:
5 to 1 modulation, Floor or Wall mount, 24-zone capacity, 10 system presets, ZoneStacking for commercial applications
GV90+ 
Ideal For:
- Residential and light commercial
- High-efficiency boiler applications
- PVC pipe venting option
- Brochure — 4.93 MB
- Manual - Series 1 — 3.57 MB
- Manual - Series 2 — 5.74 MB
- Other Downloads
- More Detailed Specs and Technical Drawings
- Category: Residential
- Product Type: Water
- Fuel Type: Natural Gas, Propane
- Material: Cast Iron, Stainless Steel
- Input MBH: 70, 105, 140, 175 MBH
- AFUE %: up to 91.9 %
- Output MBH / Steam Sq. Ft.:
65, 97, 130, 161 - Vent Category & Material:
Cat. 4 venting: S636 – PVC*, CPVC or AL29-4C
*Check local code / inspectors for acceptance - Warranty:
Residential
20 yr C.I. Heat Exchanger / 5 yr S.S. Heat Exchanger / 2 yr parts
Commercial
10 yr C.I. Heat Exchanger / 5 yr S.S. Heat Exchanger / 1 yr parts - Notes:
Includes water inhibitor, boiler and recirculation pumps
Ideal For:
- Residential and light commercial
- High-efficiency boiler applications
- PVC pipe venting option
CGa 
Ideal For:
- Residential chimney venting
- Easy installation
- Retrofit applications
- Category: Residential
- Product Type: Water
- Fuel Type: Natural Gas, Propane
- Material: Cast Iron
- Input MBH: 52, 70, 105, 140, 175, 210, 245 MBH
- AFUE %: up to 84 %
- Output MBH / Steam Sq. Ft.:
44, 59, 88, 117, 146, 175, 204 - Vent Category & Material:
Cat. 1 venting, B-Vent
*Check local code / inspectors for acceptance - Warranty:
Residential
20 yr Heat Exchanger / 2 yr parts
Commercial
10 yr Heat Exchanger / 1 yr parts - Notes:
Vertical vent only, 50 psi relief option
CGi 
Ideal For:
- Residential chimney or sidewall venting
- Retrofit applications
- Easy installation
- Category: Residential
- Product Type: Water
- Fuel Type: Natural Gas, Propane
- Material: Cast Iron
- Input MBH: 50, 60, 90, 120, 167, 200, 233 MBH
- AFUE %: up to 85.1 %
- Output MBH / Steam Sq. Ft.:
42, 51, 76, 100, 140, 167, 194 - Vent Category & Material:
Cat. 1-B-Vent / Cat. 3-AL29-4C
*Check local code / inspectors for acceptance - Warranty:
Residential
20 yr Heat Exchanger / 2 yr parts
Commercial
10 yr Heat Exchanger / 1 yr parts - Notes:
Chimney or Sidewall vent. For Cat. 1 venting increase from 3 to 4? up to CGI-3 and 3 to 5? for all other sizes.
Ultra Oil
WGO / WGTO
SGO