Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The EVG-220 and EVG-299 share the 220-399 Evergreen platform at 95.0% AFUE and 10:1 turndown; the 299 fires to 299 MBH instead of 220 and requires 4" venting, where the 220 can still run 3" pipe with a reducer.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Weil-McLain Evergreen EVG-220 | Weil-McLain Evergreen EVG-299 |
|---|---|---|
| Input, maximum | 220 MBH | 299 MBH |
| DOE heating capacity | 206 MBH | 280 MBH |
| Net AHRI water rating | 179 MBH | 243 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Turndown | 10:1 | 10:1 |
| Weight | 215 lb | 260 lb |
| Boiler water content | 4.6 gal | 7 gal |
| Venting | 3" (with reducer) or 4" PVC, CPVC, polypropylene or AL29-4C stainless steel (Category IV) | 4" PVC, CPVC, polypropylene or AL29-4C stainless steel (Category IV); 4" pipe only on the 299 |
Both models are 95.0% AFUE Evergreen boilers on the 220-399 platform with 10:1 turndown, no altitude changes to 2,000 ft, and 1-1/2" NPT supply and return tappings with 3/4" NPT gas. The 299 steps input from 220 to 299 MBH, DOE heating capacity from 206 to 280 MBH and the net AHRI rating from 179 to 243 MBH.
The visible difference is the vent: the 220 can run 3" pipe with a reducer or 4", while the 299 is 4" pipe only — a consideration for retrofit routes sized in 3". The 299 also grows to 7.0 gallons of water content and a 260 lb shipping weight against 4.6 gallons and 215 lb on the 220.
Both hold the same cabinet family and suit large homes and light-commercial loads; the 299 earns its place when the calculated load plus hot-water recovery demand approaches the 220's 206 MBH output ceiling.
Weil-McLain
The Evergreen EVG-220 is the first of the larger Evergreen platform: 220 MBH input, 206 MBH DOE heating capacity at 95.0% AFUE, modulating 10:1 and vented in 3" or 4" pipe.
Weil-McLain
The Evergreen EVG-299 delivers 299 MBH of input and 280 MBH of DOE heating capacity at 95.0% AFUE on the 220-399 platform, with 4" venting only and 7.0 gallons of water content.
The 299 fires 299 MBH for 280 MBH of DOE heating capacity and a 243 MBH net AHRI rating, against 220 MBH, 206 MBH and 179 MBH on the 220.
No. The 299 requires 4" vent/air piping; the 3"-or-4" option exists only on the 220.
Yes, both rate 95.0% AFUE at 10:1 turndown per the boiler manual ratings and brochure.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.