If you’re trying to figure out what a new HVAC system will run for your Salem, Keizer, or Willamette Valley home, it depends on a handful of specific factors about your house and the equipment you pick. This article walks through each one so you can understand what drives the number on an estimate. We don’t quote prices in articles because real costs vary too much by home — but we’ll give you a free estimate that walks through all of it transparently for your specific situation.
Why HVAC Pricing Varies So Much
I’ve been giving HVAC estimates in Salem, Keizer, and the Mid-Willamette Valley for 30+ years. The single most common question I get is “what does a new system cost?” — and the range is wide enough that any single number would mislead you.
Two homeowners in the same Keizer neighborhood, with similar-looking houses, can get legitimate estimates that differ significantly — because their ductwork is different, their electrical is different, their efficiency preferences are different, their system choice is different, and what their home needs for code compliance is different.
Rather than quote ranges that don’t apply to your specific house, here are the factors that move the number. Understanding them lets you have a meaningful conversation with any contractor you’re getting estimates from.
The System Type You Pick
The biggest single driver. The options for most Salem homes:
Gas furnace + central AC
Separate heating and cooling equipment sharing one duct system. Simple, mature, lots of installers can do it well. The cost sits in the middle of most options.
Heat pump (electric, cold-climate)
One system for heating and cooling. Higher-efficiency in our climate than most alternatives. Qualifies for more rebates and tax credits. Cost varies by SEER2 rating and single/variable-speed choice.
Dual fuel (heat pump + gas furnace backup)
Both pieces of equipment working together. Highest upfront cost, best operating cost for homes with gas service.
Ductless mini-split (single-zone)
One outdoor unit, one indoor head. Lower install cost for small applications (addition, ADU, problem room).
Ductless mini-split (multi-zone)
One outdoor unit feeding multiple indoor heads. Mid-range to higher cost depending on zone count.
Adding ducts to a home without them
Significantly more than any of the above. Retrofitting ducts into existing walls and ceilings is expensive and invasive.
Efficiency Tier Within That System Type
Each system type comes in tiers. Higher efficiency costs more upfront and pays back over time through lower operating cost.
Gas furnace tiers
- 80% AFUE — minimum tier; vents through existing chimney
- 90% AFUE — entry high-efficiency; requires PVC venting
- 95 to 98% AFUE — premium; best payback in long Willamette Valley heating seasons
- Single-stage, two-stage, modulating — adds another dimension; modulating is the most comfortable and quietest
Heat pump tiers (SEER2/HSPF2)
- Base tier — meets current federal minimum
- Mid-tier — better part-load efficiency
- Premium variable-speed — SEER2 in the 20s, HSPF2 above 10, best comfort and lowest operating cost
AC tiers
Same structure as heat pumps. Higher SEER2 ratings, variable-speed compressors, better humidity control at the premium end.
The right tier depends on how long you’ll live in the home, your electric and gas rates, and how much comfort matters to you.
How Big the System Needs to Be
Bigger systems cost more. System size is determined by your home’s heating and cooling load — which depends on square footage, insulation, windows, ceiling height, and climate.
We determine size using a Manual J load calculation. A right-sized system delivers comfort efficiently. An oversized or undersized system costs more to run and wears out faster.
Some homes in West Salem and South Salem with large square footage or vaulted ceilings need larger systems than their square footage alone suggests. Some tight, well-insulated newer builds in Keizer need smaller systems than you’d expect.
The Condition of Your Ductwork
This is the hidden variable that often surprises homeowners.
If your existing ductwork is in good shape — properly sized, well-sealed, insulated where it runs through unconditioned space — your install cost will stay in the normal range.
If your ductwork has problems, those problems have to be fixed:
- Undersized trunks restrict airflow and make modern systems perform poorly
- Leaky joints waste conditioned air into attics and crawl spaces
- Poor insulation on ducts through unconditioned spaces loses heat before air reaches the rooms
- Runs in inconvenient places may need re-routing
- Incompatible fittings may need new adapters
Older homes in Independence, Dallas, Monmouth, and the older sections of Salem often need some level of ductwork attention during a system replacement. We assess this during the estimate so you’re not surprised.
Electrical Requirements the New System Introduces
Different systems need different electrical service. Typical upgrade paths:
- Like-for-like replacement — existing breaker and disconnect work fine
- Larger system — may need a bigger breaker
- Switch to heat pump from gas furnace — usually needs new electrical run and a disconnect
- Whole-home all-electric conversion — sometimes requires a panel upgrade
Homes built before the 1990s in West Salem, Independence, or Woodburn sometimes have electrical panels that are tight on capacity. Upgrading a panel adds real cost to the project, and it’s the kind of thing that needs to be flagged during the estimate — not discovered on install day.
Venting Changes for Gas Systems
Gas furnaces need venting. Upgrading from an 80% AFUE furnace to a 90%+ AFUE furnace requires new PVC venting through an outside wall. The old chimney flue isn’t used for the furnace anymore.
If routing the new venting is straightforward, it’s modest cost. If it needs to run long distances, through finished walls, or around obstacles, it adds labor and materials.
Permits and Inspection
Oregon requires a mechanical permit for any major HVAC installation. Marion, Polk, and Linn counties each have their own fee schedules. The permit cost is modest compared to the system but is part of the estimate.
Do not work with a contractor who suggests skipping the permit. Unpermitted work can void equipment warranties, fail home inspections when you sell, and leave you liable if something goes wrong.
Thermostat and Controls
A basic thermostat is often included. Upgrading to a smart thermostat, or a thermostat with dual-fuel capability, adds cost — and is usually worth it.
Brand and Model Tier
Different manufacturers price at different levels. Within a single brand, entry-level, mid-tier, and premium equipment spans a wide range.
Some brands carry longer warranties. Some have better parts availability in our region. Some specialize in specific configurations (high-efficiency gas, ductless, cold-climate heat pump). The right brand for you depends on which of those considerations matters most.
Time of Year You Schedule the Work
Peak heating and cooling seasons (July, January) are when our schedules are fullest. Shoulder seasons (April, May, September, October) often have more availability and sometimes slightly different pricing. Booking ahead almost always serves you better than scrambling during a heat wave.
What You Can Do to Keep Costs in Check
A few things that reduce the total project cost:
- Right-size the equipment. Bigger isn’t always better — and oversized equipment costs more twice: once at install, and again in shorter equipment life.
- Fix the envelope first. If your insulation and air sealing are thin, upgrading the envelope lets you install a smaller system that does the same work.
- Address ductwork instead of oversizing. Leaky ducts waste 20 to 30% of your conditioned air. Sealing them often delivers more comfort than a bigger system.
- Pick the efficiency tier that pays back for your situation. Premium variable-speed isn’t right for every home. Mid-tier often delivers the best value.
- Stack rebates and tax credits. Energy Trust of Oregon, federal IRA credits, and Oregon state programs can offset a meaningful share of the cost on qualifying equipment. See our article on 2026 rebates.
What Belongs in a Detailed Estimate
A detailed estimate should show:
- Specific equipment model numbers (brand, size, efficiency rating)
- Labor for install
- Materials (venting, refrigerant lines, electrical)
- Permit fee
- Any required upgrades (ducts, electrical, thermostat, pad)
- Warranty terms
- Timeline
If a contractor hands you a single number without breakdown, ask for the breakdown. Any honest contractor will produce it.
Getting Quotes That Compare
When you’re gathering multiple estimates:
- Make sure every contractor is quoting the same scope (same system size, same efficiency tier, same ductwork scope)
- Confirm each includes the permit
- Confirm warranty terms are equivalent
- Note who’s pulling rebates and whether they handle the paperwork
- Pay attention to who measured and did a real load calculation versus who eyeballed it
Two estimates for “a new furnace and AC” can differ dramatically if one is for mid-tier equipment and the other is for premium. Apples-to-apples comparison is the only way to judge price.
How We Do It at CHS
We do Manual J load calculations on every install, assess your ductwork and electrical honestly, explain the tier choices in plain English, and write the estimate with line items. Salaried technicians, not commissioned, so the recommendation is based on what your home needs — not what pays the biggest commission. Family-owned in Salem since 2001. Licensed and insured under CCB# 147550.
Related Reading
- What Size HVAC System Does Your Home Need?
- How to Pay for a New HVAC System
- HVAC Tax Credits and Rebates in 2026
Ready to Talk to Stan?
No pressure, no surprises — just honest advice from a team that’s been keeping Salem homes comfortable since 2001.
Call or text: (503) 581-6999
Email: chssatt@gmail.com
Service area: Salem, Keizer, Dallas, Monmouth, Independence, Silverton, Stayton, Aumsville, Sublimity, Albany, Woodburn, Scio, and surrounding Mid-Willamette Valley communities.
Licensed & insured: CCB# 147550
Call or text for a free estimate. We’ll walk the house, run the Manual J, and give you a transparent, line-itemed number for the work your home actually needs — not a generic range that doesn’t apply to your specific situation.