Furnace Replacement & Installation in Guelph
Replacing a furnace is a chance to fix problems the old one may have been fighting for years — undersized, oversized, or ducted awkwardly for the house it's in. We run a proper heat-load calculation rather than just matching the old model's BTU rating, because a lot of older furnaces were oversized from the start, which actually hurts comfort and efficiency (short-cycling, uneven heat).
High-efficiency condensing furnaces (95%+ AFUE) cost more upfront but the fuel savings are real in a heating-dominant Ontario climate, and most qualify for rebate programs — we'll tell you what's currently available. Mid-efficiency units remain a solid, lower-cost option, especially where existing venting favours them.
- Proper Manual J-style heat-load calculation, not a guess-and-match
- Mid-efficiency and high-efficiency (95%+ AFUE) options
- Old unit removal and disposal included
- TSSA-licensed gas fitting and permit/inspection where required
What it costs in Guelph
- Mid-efficiency furnace, installed: $3,500–$5,500
- High-efficiency condensing furnace, installed: $5,000–$8,500
- Ductwork modification, if required: quoted separately after inspection
- Rebate programs change year to year — ask what applies at the time of your quote
Furnace Replacement & Installation FAQs
How long does furnace installation take?
A standard like-for-like replacement is typically done in one day. Jobs requiring venting changes (switching efficiency tiers) or ductwork modifications may take two.
Mid-efficiency or high-efficiency — which should I choose?
High-efficiency saves more on fuel over time and often qualifies for rebates, but costs more upfront and needs a condensate drain and different venting. Mid-efficiency is simpler and cheaper installed. We'll run the real numbers for your home and usage.
Will my old ductwork work with a new furnace?
Usually yes for a like-for-like replacement. If your ducts were undersized for the old furnace too, that's a separate airflow conversation worth having during a replacement rather than after.
Are there rebates for a new furnace in Ontario?
Programs come and go — enbridge and federal/provincial efficiency incentives have existed in various forms. We'll tell you what's actually available and eligible at the time you're quoting, rather than quote a rebate that may have expired.