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Davis & Salt Lake County

(385) 865-6749
CMB HVAC — Utah's Local HVAC

Furnace Installation & Replacement

Furnace Replacement Designed Around the Home

A replacement furnace must match the home's heating load, duct system, fuel and venting conditions, controls, and comfort goals. CMB HVAC evaluates the whole installation before presenting equipment choices and a written scope.

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Furnace Replacement Designed Around the Home

The old furnace's nameplate is history, not guidance: homes change, and furnaces get replaced wrong when they're sized from what was there instead of what the house needs. We calculate the heating load from your home as it stands, check the ducts, venting, gas supply, condensate, and electrical conditions, and only then present equipment options — flat-rate, in writing, with the trade-offs explained.

Installation day is the other half of quality: permit pulled, old unit out, new furnace set and connected to code, then commissioned — temperature rise, airflow, safeties, and gas/combustion readings measured and recorded. You get the startup sheet, the warranty registration, and a controls walkthrough before we leave.

The Numbers a Quality Install Leaves Behind

  • Load calculation, shared

    The heating load comes from your home as it stands — the number travels with the quote so you can see the reasoning.

  • Commissioning sheet

    Temperature rise, airflow, safeties, and combustion readings recorded at startup and left with you.

  • Permitted & inspected

    Mechanical permit pulled and work inspected — the paper trail that protects warranty and resale.

  • AFUE explained honestly

    Efficiency options compared with real installed costs and conditions — not the assumption that the priciest label wins.

When a Furnace Quote Makes Sense

None of these is an automatic verdict — each means the numbers are worth putting side by side.

  • A significant repair was quoted

    A heat exchanger finding (with evidence), an obsolete board, or a blower-and-module job — that's when repair-vs-replace becomes a real conversation.

  • Repairs are becoming a pattern

    Two significant repairs in recent seasons is a trajectory. We'll show the repair curve against a replacement quote.

  • Some rooms never warm up

    Cold rooms can be ducts, insulation, or an oversized furnace that short-cycles. Worth a measured look before assuming anything.

  • The AC is being replaced

    The indoor coil lives on the furnace. Replacing both together is one project, one set of permits — and often the better number.

What a CMB Furnace Replacement Includes

  • Heating load calculation on your home as it stands, shared with the quote
  • Equipment options at two or three tiers — flat-rate, in writing
  • Duct, venting, gas supply, condensate, return-air, and electrical conditions verified
  • All mechanical permitting and inspection scheduling
  • Old furnace removal and haul-away, home protected throughout
  • Condensate pump/drain setup on condensing models where required
  • Startup commissioning: temperature rise, airflow/static pressure, safeties, gas & combustion readings
  • Thermostat setup, warranty registration, and a full homeowner walkthrough

How We Size and Specify a Furnace

  1. Heating load calculation

    A Manual J on the current home — not the old nameplate. Oversized furnaces short-cycle; undersized ones lose the cold snap.

  2. Airflow & duct survey

    Static pressure and duct condition measured — the new furnace's blower has to move air through what exists.

  3. Venting & gas check

    Vent type, length, and termination reviewed against the candidate equipment; gas supply and pressure verified.

  4. Site conditions

    Condensate routing, return-air path, clearances, and electrical — the details that decide whether the install is clean or compromised.

  5. Options in writing

    Two or three properly sized tiers with stages and blower types explained. Flat-rate, one page, no deposit until you decide.

Stages, Blowers, and AFUE — Translated

The brochures make it sound complicated; the honest differences are learnable in two minutes.

  • Single-stage, standard efficiency

    One heat level, one speed. Simple, serviceable, and the right value for many homes — it just runs all-or-nothing, so temperature sits in a wider band.

    Best for: budgets that prioritize straightforward reliability

  • Two-stage, efficient

    Mostly runs low and long, steps up for the deep cold. Quieter, more even, fewer cold-blast startups — the comfort sweet spot for most Utah homes.

    Best for: two-story homes and anyone tired of on/off noise

  • Modulating, highest AFUE

    Continuously varies heat output and blower speed for the steadiest temperature and the highest efficiency rating — with the highest installed cost.

    Best for: long-ownership horizons where the efficiency math has time to work

Amana 90% gas furnace, upflow configuration
Condensing (90%+ AFUE) furnaces like this Amana need condensate drainage and venting planned — part of why the site survey comes first.

What Drives the Price of a Furnace Replacement

Two homes on the same street can quote differently and both be right. Here's what moves the number.

  • Capacity & efficiency tier

    The load calculation sets the size; you pick the tier. The highest-AFUE option is not automatically the lowest total cost — installation conditions and ownership horizon decide that.

  • Venting changes

    High-efficiency condensing furnaces vent through PVC with their own condensate — switching categories can add venting and drainage scope.

  • Airflow corrections

    Return-air and duct limitations the survey finds are quoted plainly as their own line items, never folded in silently.

  • Pairing with the AC

    The indoor coil sits on the furnace; matched pairing preserves rated efficiency on both sides, and sometimes the right scope includes both systems.

Every replacement is quoted flat-rate on one page — equipment, materials, permit, and labor itemized. Rebates and utility incentives change by season and program; when one applies to your project it appears on the quote as its own line, verified at the time, not folded into a vague discount. We don't publish price ranges because honest ranges are too wide to be useful.

How a CMB Furnace Install Runs

  1. Quote visit

    Load calc, duct and venting checks, options at two or three tiers. Flat-rate, in writing, no deposit until you decide.

  2. Install day

    Protection down, old furnace out and hauled away, new unit set — gas, venting, condensate, and electrical to code, permit displayed.

  3. Commission

    Temperature rise, static pressure, safeties, and combustion readings measured and recorded. The startup sheet is yours.

  4. Walkthrough

    Thermostat taught, filter sizes confirmed, warranty registered, cleanup walked. Questions answered until they're not questions.

What Utah Homes Need From a Furnace

Wasatch Front winters are long enough that furnace sizing and staging genuinely matter. Our big day-night swings reward equipment that can run low and steady instead of all-or-nothing, and the dry, dusty air punishes restricted airflow — which is why the duct and filter conversation is part of every quote, not an afterthought. For homes weighing gas against a heat pump, the honest comparison lives on our heat-pump installation page; for everyone else, a correctly sized furnace remains the dependable backbone of a Utah winter.

  • Right-sizing matters more than the efficiency sticker: short-cycling wastes the AFUE you paid for
  • Two-stage equipment earns its keep on our shoulder-season nights
  • Condensing furnaces need their condensate protected from freezing in garages and attics

Related Services & Pages

The Questions Every Homeowner Asks

How is a furnace sized?
With a Manual J heating load calculation on your home as it stands — insulation, glazing, orientation, infiltration — never by matching the old nameplate and never by square-foot rules of thumb. The old furnace's size is a data point: it may have been wrong from day one, or the house may have changed with new windows or insulation. The calculation comes with the quote so you can see why we specified the capacity we did.
What does AFUE mean?
Annual Fuel Utilization Efficiency — the percentage of fuel's energy that becomes heat for your house across a season. An 80% furnace sends roughly a fifth of its fuel up the flue; a 95% condensing furnace captures most of that by extracting heat from the exhaust itself, which is why it vents in PVC and produces condensate. Higher AFUE costs more up front and saves more the longer the furnace runs and the colder your climate — which is why we compare options against your ownership horizon instead of defaulting to the biggest number.
Should I choose single-stage, two-stage, or modulating heat?
It's about how the heat feels and how the furnace runs, not just the rating. Single-stage is all-or-nothing: dependable, with a wider temperature band and more on/off noise. Two-stage runs low most of the time and steps up in deep cold — quieter, more even, and usually the sweet spot for Wasatch Front homes. Modulating continuously matches output to the house for the steadiest comfort and highest efficiency, at the highest cost. We'll show you all three, priced, and tell you honestly which we'd pick for your house.
Should I replace my AC at the same time?
Often, yes — the AC's indoor coil sits on the furnace, and the pair is rated as a matched combination. Keeping an old coil under a new furnace (or vice versa) forfeits rated efficiency and can leave you outside the manufacturer's matching requirements. If both systems are aging, doing them together means one project, one set of permits, and usually a better number than two separate visits. If the AC is young and healthy, we build the quote around keeping it — the load calc and coil condition tell us which situation you're in.
Will the existing ductwork work?
The survey answers that before anything is ordered: static pressure and duct condition are measured, and the candidate furnace's airflow needs are compared against what the ducts can actually deliver. Many homes pass as-is. Some need return-air or specific-run corrections — quoted as their own line items if so. A furnace that can't breathe is an oversized bill with a short warranty, so if the ducts need work, we'd rather tell you on the quote visit than discover it on install day.
What warranties apply?
Two layers: the manufacturer's parts warranty — which we register at startup so the term starts correctly — and our workmanship on the installation itself. The startup sheet documents the commissioning readings (temperature rise, safeties, combustion), which is the baseline any future service call stands on, and the permit record completes the paper trail. You'll know exactly what's covered by whom before the walkthrough ends.

Connect With Us For Your Free In-home Consultation!

Get a Furnace Quote Worth Comparing

A load calculation, properly sized options at two or three tiers, and the whole scope priced on one page.

Schedule a Quote VisitCall (385) 865-6749