Ductless Mini-Splits in Portland, OR
Get My Free EstimateComfort Without the Ductwork
Mini-splits are all we do — installed, zoned, repaired, and maintained by specialists.
Ductless Specialists, Meticulous Installs
When mini-splits are the whole business, the details are the difference.
Whisper-Quiet
Indoor heads as low as 19 dB — you'll forget it's running.
Clean Line Hides
Level heads, hidden line sets, and tidy penetrations — install as art.
No Ductwork, Big Savings
Skip lossy ducts entirely — efficient comfort exactly where you want it.
Zoned to Your Life
Heat the bedroom, cool the office — independent control, room by room.
Portland's Ductless-Only Crew
Slimline Comfort does one thing: ductless mini-splits. For eleven years we've made Portland's old, duct-free houses comfortable — quietly, efficiently, and without tearing up walls for ductwork.
Because it's all we do, our line-set work is meticulous, our zoning is dialed, and our heads sit dead level every time. If you've got a hot upstairs, a cold addition, or a whole house with no ducts, we're the specialists.
- ✓11 years installing ductless only
- ✓Meticulous, hidden line-set work
- ✓Multi-zone design done right
- ✓Efficient heat + AC with no ducts
Ductless, Done Beautifully
What a Meticulous Ductless Install Looks Like
Four details a general HVAC crew rushes — and we obsess over.
Right-Sized Zones
We size each head to its room — no oversized, cycling, humid guesses.
Hidden Line Sets
Line hides and clean penetrations so the install looks intentional, not tacked on.
Dead-Level Heads
Every indoor head sits perfectly level, drains correctly, and runs silent.
Zoned & Balanced
Independent room control, commissioned and tested for even, quiet comfort.
From Free Estimate to Quiet Comfort
Four simple steps.
Free Estimate
We assess your space, plan the zones, and give you a flat quote.
Design the Zones
We map heads to rooms and route line sets for a clean, hidden install.
Meticulous Install
A ductless specialist installs it tidy — usually in a single day.
Silent Comfort
We commission each zone and show you how to run it. Enjoy the quiet.
No ducts? No problem. Get quiet, efficient comfort.
A free estimate shows you the zones, the quote, and the right mini-split for your space.
One Outdoor Unit. Every Room Dialed In.
A multi-zone mini-split runs several indoor heads from a single outdoor condenser — so the bedroom, office, and living room each hold their own temperature, quietly and efficiently.
We design the zoning around how you actually live, hide the line sets, and balance the system so no room is an afterthought. It's central-comfort flexibility without a single foot of ductwork.
- ✓Independent control in every room
- ✓One tidy outdoor condenser
- ✓Whisper-quiet indoor heads
- ✓Efficient heating and cooling year-round
Ductless Mini-Split FAQs
Do mini-splits heat as well as cool?
Yes — a ductless heat pump does both efficiently. In Portland's mild climate they heat beautifully year-round, and modern cold-climate models handle the occasional cold snap without breaking a sweat.
Are they really that quiet?
They are. Indoor heads run as low as around 19 dB — quieter than a whisper. Most clients forget the system is even on. The outdoor condenser is far quieter than a traditional AC unit too.
Can one system handle my whole house?
Often, yes — a multi-zone system runs several indoor heads from one outdoor unit, giving each room independent control. We design the zoning around how you actually use your space.
Do I need ductwork?
No — that's the whole point. Mini-splits deliver heating and cooling directly to each room with no ducts, which also avoids the 20–30% energy loss ducts typically cause. Perfect for older Portland homes.
How long does an install take?
Most single-zone installs are done in a day; multi-zone systems may take one to two. Because we specialize in ductless, our installs are fast, clean, and meticulous.
Are mini-splits good for a garage or ADU?
Ideal, actually. A single mini-split heats and cools a garage studio, shop, or ADU without touching your main system — quiet, efficient, and independently controlled.
Get Your Free Ductless Estimate
Tell us about the space you want comfortable — one room or the whole house — and we'll design the zones and quote it flat.
- Visit usPortland, OR 97205
- Call us(503) 555-0191
- Email ushi@slimlinecomfort.com