North Stair Air Solutions

Let's Get Your Heating & Cooling Sorted

What do you need help with?

Why do we ask?

This helps our team assign the right technician to your project for the best results.

Furnace installation, replacement & AC repair

Whether you need to replace an aging furnace, install heating in a new home or addition, or get your AC or furnace working again, our licensed technicians handle it with clear, upfront pricing. Serving homeowners across the Greater Seattle area including Bellevue, Kirkland and Renton.

  • Upfront, competitive pricing
  • Furnace replacement & new installs
  • AC and furnace repair
  • Licensed, insured technicians
  • Clean, respectful service visits
Get My Free Estimate
HVAC technician installing a new furnace

Our HVAC Services

Not sure whether to repair or replace? A technician will look at your system and walk you through honest options.

Technician installing a new high-efficiency furnace

Replace Your Current Furnace

Old furnace struggling or driving up your bills? We remove it and install a properly sized, high-efficiency unit — usually in a single day.

  • Correct sizing for your home
  • High-efficiency gas & electric
  • Old unit hauled away
Ductwork being installed in a newly framed home

Furnace for a New Home or Addition

Building, adding on or finishing a space? We design and install the furnace and ductwork so every room heats evenly.

  • Load calculation & design
  • New ductwork and vents
  • Permits and inspections handled
Technician repairing an outdoor air conditioner

AC & Furnace Repair

No heat, no cooling, strange noises or short cycling — our technicians diagnose the problem and fix it right the first time.

  • Fast local service
  • Upfront repair pricing
  • All major brands

Why Upgrade Your Heating & Cooling

Lower Energy Bills

Modern high-efficiency furnaces turn more of your fuel into heat, which can noticeably cut monthly heating costs.

Even, Reliable Comfort

A correctly sized system keeps every room at a steady temperature without hot and cold spots.

Safer Home

Aging furnaces can develop cracked heat exchangers. A new unit or proper repair keeps your family safe.

Cleaner Air

New equipment and filtration reduce dust and allergens circulating through your home.

Fewer Breakdowns

Replacing a worn-out system ends the cycle of emergency calls on the coldest or hottest days.

Adds Home Value

An updated heating and cooling system is a strong selling point for buyers and inspectors.

Get Your Free Estimate

Furnace replacement, new install or repair — answer a few quick questions and we'll match you with the right technician.

Get Started

Recent HVAC Projects

New furnace installation in a basement
Air conditioner repair at a Seattle-area home
Furnace and ductwork installation in new construction

What Our Customers Say

4.9 average from 200+ verified reviews

“Our 25-year-old furnace finally quit in January. They came out the next morning, gave us a clear price, and had a new one running by dinner. House has never been this warm.”
Jen M.· Ballard · Furnace Replacement
“They designed the heating for our addition and tied it into the existing ducts. Every room stays the same temperature now, which never happened before.”
David & Karen L.· Bellevue · New Addition
“AC died during a heat wave. Tech found a bad capacitor, fixed it in under an hour, and didn't try to sell me a new system. Will call them again.”
Marcus T.· Kirkland · AC Repair
“Furnace kept shutting off. They explained exactly what was wrong, showed me the part, and the price matched the quote. No surprises.”
Priya S.· Redmond · Furnace Repair

Common Questions, Honest Answers

Everything Seattle homeowners ask before booking a furnace or AC service.

It depends on your home's size, the equipment you choose, and the condition of your ductwork. A technician will inspect your system and give you a clear written price before any work begins. No pressure, no gimmicks.