Boilers
IBC Technologies SL 30-199G3 Condensing Boiler
Installed price on hydronic work varies more by market, existing-system condition and contractor than by brand. Several products in this catalog explicitly recommend getting at least two contractor quotes for this reason.
199,000 BTU/h condensing boiler, the top of IBC's own Residential SL Series G3 lineup — sized for a larger home or a house with a genuinely high design-day load, without stepping into commercial-grade equipment.
Our take
IBC is a Canadian manufacturer with a smaller US footprint than Lochinvar or Weil-McLain, sold through wholesale distributors like AF Supply rather than the big-box-adjacent channel. DATA CORRECTION (2026-08-24): this entry previously listed the SL-26-260G3 at 260,000 BTU/h — IBC's own product line classifies that specific SKU as 'Light Commercial,' not residential, and its rated capacity exceeds this catalog's residential plausibility envelope. Corrected to the SL-30-199G3, the largest model IBC itself classifies as residential. The 96% AFUE figure carries forward from the same G3 platform's confirmed spec on the 260 model — condensing AFUE is generally stable across capacity points on one shared combustion platform, but this exact figure has not been independently reconfirmed at the 199,000 BTU/h capacity point specifically, so treat it as a same-platform estimate, not a verified per-SKU number. If your home genuinely needs more than 199,000 BTU/h, IBC's SL-26-260G3 exists but is outside this catalog's residential scope — ask a contractor directly rather than assuming a residential listing covers it.
Best for
Larger homes or homes with a genuinely high design-day heat loss where a single large boiler is preferred over two smaller units, within IBC's residential-classified range.
Watch out for
Confirm a local contractor actually stocks IBC parts before buying — availability is thinner than the US-focused brands in this catalog. No current real seller price could be sourced for this exact SKU (see price_seed.py note) — get a live quote rather than relying on a listed figure for a different capacity point.
Model number check: corrected
This catalog entry originally listed IBC's SL-26-260G3 (260,000 BTU/h), which IBC's own site classifies as 'Light Commercial.' Corrected to the SL-30-199G3, the largest model IBC itself classifies as Residential. The AFUE figure confirmed via a real distributor listing for the 260 model carries forward as a same-platform estimate for this SKU, not an independently verified number at this exact capacity point.
Compare against
Lochinvar Knight Fire Tube Condensing Boiler
Fire-tube condensing boiler with 10:1 turndown, built for the residential and light-commercial hydronic market.
Navien NFC-175 Condensing Combi Boiler
High-turndown condensing combi boiler providing both hydronic heat and domestic hot water from one wall-hung unit.
Viessmann Vitodens 100-W Condensing Boiler
German-engineered condensing boiler with a stainless Inox-Radial heat exchanger and a 10:1 turndown ratio in line with the rest of this catalog's condensing boilers.
Weil-McLain Evergreen Condensing Boiler
Stainless condensing boiler from the most established US residential boiler brand.
Before you buy this
Ask about turndown ratio, not just efficiency — a boiler that can't modulate down to your house's actual heat loss on a mild day short-cycles, and short-cycling is what wears a boiler out early. Confirm whether your radiators or baseboard were sized for the supply temperature this boiler will actually deliver. And ask for a heat-loss calculation instead of matching the old unit's output.