If you’re building a new home in Salem, Keizer, or anywhere in the Mid-Willamette Valley, bring your HVAC contractor in during the design phase — not after drywall goes up. Oregon’s energy code now strongly favors heat pumps. Ductwork has to be sealed and tested to tight leakage standards. Tight, well-insulated homes need mechanical fresh-air ventilation. Getting all three right before framing starts is the difference between a comfortable, efficient home and one you’ll be fighting with for a decade.
Why This Gets Harder Once Walls Are Closed
I’ve spent 30+ years installing HVAC across the Mid-Willamette Valley, and the homes I see with the best long-term comfort are the ones where we had a seat at the table during design. Retrofits are always a compromise — we work around joists, wall cavities, and duct runs that weren’t planned for the system you need.
New construction is your one chance to design it right. Equipment placement, duct routing, fresh-air paths, thermostat locations, condensate drain routes — all of it is easier, cheaper, and more effective when the framing is still on paper. By the time the drywall crew shows up, every choice narrows.
What Oregon’s Energy Code Means for Your Build
Oregon has adopted a version of the International Energy Conservation Code with state amendments tuned to our climate. The current code pushes hard toward heat pumps as the default heating system, and it has real implications for what gets built here.
Heat pumps are now the default path
Installing a standard gas furnace as the primary heating system is no longer the easy path to compliance. The code’s energy budget makes heat pumps — especially cold-climate models — the straightforward choice for most new homes in Salem, Dallas, Silverton, and everywhere between. Gas heat is still allowed, but it usually requires compensating somewhere else in the energy budget (tighter envelope, better windows, a smaller footprint, or a hybrid dual-fuel setup).
Ducts get sealed and tested
All ductwork in new construction has to be sealed and tested for leakage. The target is under 4 cubic feet per minute of leakage per 100 square feet of conditioned space. That testing happens with a duct blaster before drywall, and again at rough inspection.
This is a good thing for homeowners. Sealed ducts mean the heated or cooled air actually reaches the rooms it’s supposed to, which means a smaller system can do more work.
Insulation standards mean smaller equipment
A well-insulated 2,000-square-foot new home in Keizer might need a 2-ton heat pump. That same home built in the 1990s would have been sized for 3 tons. Tighter envelopes and higher insulation values mean the system doesn’t have to fight the weather as hard — and smaller systems cost less to buy and less to run.
Ventilation is mandatory
New homes are tight enough that they can’t “breathe” without help. Most new builds need an Energy Recovery Ventilator (ERV) or Heat Recovery Ventilator (HRV) that brings in fresh air, exhausts stale air, and recovers the heating or cooling energy in the process. This is non-negotiable on tight modern construction — and we see the difference in indoor air quality in homes that got it right versus homes that didn’t.
Start With a Real Load Calculation
The foundation of every good HVAC design is an accurate Manual J load calculation. Not a square-footage guess, not a rule of thumb — a real room-by-room analysis of how much heating and cooling the specific house will need.
What Manual J accounts for:
- Home orientation (south-facing windows in the Willamette Valley change the load significantly)
- Insulation levels in walls, ceilings, and floors
- Window sizes, U-values, and solar heat gain coefficients
- Local climate data (Salem’s design temperatures are different from Bend’s or the Oregon coast’s)
- Occupancy patterns and internal heat gains
- Infiltration rates from the envelope design
Why it matters: oversized equipment short-cycles, wastes energy, doesn’t dehumidify properly, and wears out faster. Undersized equipment runs constantly and never catches up on design days. Right-sized equipment is the single biggest efficiency decision in the project.
Where Duct Design Gets Compromised
Good duct design is where most new-construction HVAC jobs get compromised. Builders love straight runs and simple layouts. Reality often demands something more tailored.
Things we look at during design:
- Trunk sizing appropriate for the equipment’s airflow — undersized trunks are the #1 cause of noisy vents and hot/cold spots
- Register placement that matches how the rooms will actually be used (the sofa wall or the bed wall isn’t usually the right spot)
- Return-air paths sized for the system — undersized returns starve the blower and cut efficiency
- Runs kept inside conditioned space wherever possible, so duct heat loss doesn’t eat into the efficiency numbers on paper
- Balanced airflow room-by-room so no bedroom roasts while another freezes
Taking an afternoon during the design phase to lay this out properly pays back over 20 years of occupancy.
Equipment Choices for New Builds in Our Climate
A few patterns we see working in current Willamette Valley new construction:
All-electric heat pump, single system
A cold-climate heat pump as both heating and cooling source. Simplest layout, code-favorable, lowest installed cost in most cases, and electricity is the infrastructure Oregon is investing in. Works well for most homes in Salem, Albany, and newer Keizer neighborhoods.
Dual-fuel (heat pump + gas furnace backup)
Heat pump handles most of the season. A gas furnace kicks in on the coldest nights. Best-of-both-worlds efficiency for homes that want the security of gas heat during a rare cold snap in Woodburn or Silverton. More complex install, higher upfront cost, but lower operating cost on very cold days than all-electric.
Ducted heat pump + ductless additions
Main home gets a properly sized ducted heat pump. A finished basement, ADU, or bonus space that sits above a garage gets a ductless head on its own zone. Useful when parts of the home have very different use patterns or occupancy.
Zoned systems for larger homes
Two-story homes over about 2,500 square feet often benefit from zoning — dampers and independent thermostats that condition the upstairs and downstairs separately. This is common in larger new builds in South Salem and West Salem.
Work With a Contractor Who Knows the Local Code
Oregon codes are specific, and Marion County, Polk County, and Linn County all pull permits through slightly different channels. The plans, load calculations, duct test results, and commissioning paperwork have to line up or the project stalls at inspection.
A local HVAC contractor who does new construction regularly will:
- Sit with your architect or designer during the mechanical plan
- Produce the Manual J, Manual D (duct design), and Manual S (equipment selection) documentation the code calls for
- Pull the mechanical permit with the correct jurisdiction
- Coordinate with the electrical and framing crews so nothing gets buried in the wrong place
- Show up for rough inspection and final inspection
- Commission the system at the end — test airflow, balance registers, verify refrigerant charge, set the thermostat up properly
Commissioning Is Where Good Builds Separate From Great
A system that’s installed and turned on isn’t the same as a system that’s been commissioned. Commissioning is the process of verifying that the finished system actually delivers what the plan specified.
Real commissioning includes:
- Airflow measured at every supply register against the design target
- Returns verified for sufficient open area
- Duct balancing dampers set for even room-by-room delivery
- Refrigerant charge confirmed by measurement, not just gauge pressure
- Thermostat programmed for the homeowner’s schedule and preferences
- ERV or HRV airflow balanced and documented
Without commissioning, a brand-new home can underperform a properly commissioned retrofit in a 40-year-old house. We’ve seen it.
How We Do It at CHS
We work with homeowners and builders across the Mid-Willamette Valley on new construction from the design phase through commissioning. Manual J, Manual D, and Manual S on every project. Permit pulled through the correct county. Salaried technicians, not commissioned. Licensed and insured under CCB# 147550.
We’ve been family-owned in Salem since 2001 — if a warranty question comes up in year eight, we’re still at the same number.
Related Reading
- Should You Get a Heat Pump or a Furnace?
- What Size HVAC System Does Your Home Need?
- Why Homeowners Are Switching to Heat Pumps
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
If you’re in the design phase of a new build — or planning one — get us involved before the mechanical plan is finalized. Call or text for a free consultation and we’ll walk through what the code requires and what actually works in our climate.