FURNACE INSTALLATION IN SALT LAKE CITY — OCTOPUS REPLACEMENTS A SPECIALTY

Furnace installation in Salt Lake City is rarely the like-for-like swap that a furnace install is in West Jordan or Lehi. SLC's housing stock skews older — Avenues (1890s-1925), Marmalade (1900s-1940s), Sugar House (1910s-1930s), Liberty Wells (1920s-1940s), Capitol Hill (1900s-1930s). The furnaces we replace fall into a few categories: original octopus gravity furnaces from the 1940s still in service, 1970s-80s atmospheric-vent units near end of life, and 1990s mid-efficiency furnaces hitting their 25-year point. Each requires different install scope, different ductwork modification, and different chimney work.

Our SLC crew dispatches from 244 W 300 N in Marmalade — 5 minutes to the Avenues, 10 to Sugar House. We've replaced enough furnaces in 36-inch-wide basement doorways with 6.5-foot ceilings to know which units fit and which need to be cut into pieces on the way out. We've re-lined enough chimneys for water heater venting after 80%-to-95% upgrades to do it cleanly in a half-day. And we've quoted enough octopus replacements to know that the conversation isn't just about the furnace — it's about the ductwork, the venting, the existing thermostat wiring, and the basement access.

What gets installed

A modern 95%+ AFUE condensing furnace vents through PVC (not metal flue), pulls combustion air from outside, and condenses exhaust to extract nearly all heat. That condensate has to drain — into an existing drain, pumped to a floor drain, or routed outside with freeze protection. If we're replacing an 80% atmospheric-vent unit, the existing metal flue usually can't be reused because your water heater can no longer draft on its own. We re-line the chimney or convert water heater venting as part of the job. Add $685-$1,450 for chimney re-line.

Octopus furnace replacement — SLC specialty

When we replace a 1940s gravity octopus furnace, the scope is bigger than a normal swap. The original 16-18" round trunk lines designed for natural-convection airflow are wrong for a high-efficiency variable-speed blower's CFM output. The original return air — usually a single grille at the bottom of the basement stairs — is undersized. The original chimney is sized for the old gravity flue, not modern PVC. Plan on $6,500 to $9,200 turnkey for an octopus replacement: $5,200-$7,800 for the furnace itself, plus $1,500-$3,500 for ductwork modification, plus chimney work. We've done several hundred of these in the Avenues, Sugar House, and Marmalade.

Tight basement access

Avenues and Marmalade basements are often 6.5-foot ceilings with narrow stairs and stone foundation walls. Old octopus furnaces don't fit through doorways whole — we cut them into sections to remove. New furnaces are typically modular. We bring rigging, dollies, and ramps to make tight access work. If your basement requires a hatch removal or a window-well dolly drop, we plan for it during the quote.

Manual J load calculation — especially important in old homes

Old SLC homes have wildly variable insulation, infiltration, and window quality. A 1925 Avenues bungalow with original single-pane windows and no wall insulation has 3-4x the heat loss of a 2010 Daybreak townhouse of similar square footage. Sizing furnace by rule-of-thumb in these homes is how you end up with an oversized unit that short-cycles. We do a real Manual J for every install — measuring envelope, window area, insulation in walls and attic, infiltration estimates. Right-sizing pays off in steadier comfort, longer cycles, and lower gas bills.

What we install — brands

Trane XR, XL, and XV series. Lennox Merit and Signature. Carrier Performance and Infinity. Rheem Classic Plus and Prestige. Trane and Rheem dominate Wasatch Front parts availability. Factory-trained on all four. We quote two to three brand options at different price points — the "best value" unit isn't always the top-tier model.

Components that matter in old SLC homes

• Variable-speed ECM blower — quieter, better airflow distribution, 30-50% less electricity than old PSC motors; matters more in homes with marginal ductwork
• Two-stage or modulating burner — runs at 40-60% on mild days, full output when 8°F; no more short cycling, important in homes where the furnace is short-cycling
• Sealed combustion — pulls air from outdoors not from conditioned basement space; matters on inversion days when basement air quality is bad
• Stainless heat exchanger — 20-year design life
• Communicating controls (optional) — fully-communicating systems modulate together if you upgrade thermostat and AC

Install day in SLC

One tech crew, two people, 6-9 hours on site for a standard replacement. 8-12 hours for an octopus replacement with ductwork mods and chimney re-line. Old unit pulled and hauled out (in sections if necessary). New unit set on a fresh pad, leveled, connected to gas, electrical, existing or modified ductwork. PVC vent and intake cored through rim joist or exterior wall. Condensate drain routed and tested. Thermostat reconfigured or upgraded. Combustion analyzer run before final wipe-down — CO, O2, flue temp, flame rectification documented. Permit inspection through Salt Lake City Building Services usually within 5 business days; we're there for the inspection.

Honest pricing for SLC homes

• Standard 95% AFUE single-stage: $5,200-$7,800
• Two-stage with ECM blower: $6,500-$9,200
• Modulating 97%+ AFUE with communicating controls: $8,500-$12,500
• Octopus furnace replacement (turnkey including ductwork mods): $6,500-$11,500
• Chimney re-line for water heater venting: $685-$1,450 added when going 80% to 95%

Anyone quoting $3,500 for a "full install" in an SLC home is skipping the permit, reusing bad ductwork, or using a non-branded unit that won't pass inspection. That shortcut shows up on replacement calls every year.

Warranty and financing

Factory parts warranty 10 years on every major component with registration (we handle). Our labor warranty matches — 10 years on install workmanship. Financing: 0% for 12 months on approved credit for standard installs, 24-60 month plans for larger jobs (octopus replacements often run on financing). Quality Service Club HVAC members get 15% off accessories (humidifier, media filter, zoning) added at install plus the first year of maintenance included.