What we do

Services that keep your home running.

From a frozen coil at midnight to a brand new heat pump install, our team handles every part of residential and light-commercial HVAC in greater Cincinnati. All work is backed by a minimum 1-year parts and labor warranty.

Diagnostic from $79

AC & Furnace Repair

Same-day diagnosis, honest fix, upfront pricing.

From frozen coils to cracked heat exchangers, our techs carry the parts most repairs need on the truck so you're cool (or warm) again before dinner. Every repair starts with a flat-rate $79 diagnostic fee, which is waived if you book the repair with us.

Same-day dispatch available Mon-Sat
Trucks stocked with 500+ common parts
Flat-rate pricing approved before work begins
All repairs backed by a 1-year parts and labor warranty
Emergency calls prioritized within 62 minutes

Common issues we fix

AC not cooling

Low refrigerant, dirty coil, or failed capacitor

Furnace won't start

Igniter failure, dirty flame sensor, or tripped limit switch

Unit running but no airflow

Blower motor failure or severely clogged filter

Short cycling

Oversized system, refrigerant issue, or thermostat fault

Water leaking from AC

Blocked condensate drain or frozen evaporator coil

Request service

Free in-home quotes

New System Installation

High-efficiency systems sized right for your home.

We perform a full Manual J heat-load calculation on every install so the system is sized for your actual home, not a sales quota. You get three equipment options at different efficiency tiers with honest payback math on each one.

Free in-home estimates for all replacement projects
Manual J load calculation included on every quote
Three-option pricing at different efficiency tiers
Same-week installs on most standard residential sizes
10-year parts and labor warranty on qualifying systems

Common issues we fix

High energy bills after install

Improperly sized system or refrigerant charge error

Uneven temperatures

Duct design mismatch or undersized equipment

System short cycles

Oversized equipment for the home's load

Loud operation

Poor equipment placement or missing vibration isolators

Request service

From $19 / month

Maintenance Plans

Two tune-ups a year. Priority service. No diagnostic fees.

Members get a spring AC tune-up, a fall heat tune-up, meaningful repair discounts, priority dispatch, and no diagnostic fees. The average member saves $340/year and avoids the call that ends a summer weekend.

Spring 21-point AC tune-up every year
Fall 18-point heating tune-up every year
No diagnostic fees, ever, on any call
Priority same-day dispatch for all service calls
Annual maintenance history report emailed to you

Request service

Packages from $389

Duct Cleaning & Indoor Air Quality

Cleaner air, less dust, fewer allergens.

Full whole-home duct cleaning using truck-mounted vacuum and rotary brush system, followed by antimicrobial sanitation. We also install UV air purifiers, MERV-13 media filters, and whole-home humidifiers.

Before-and-after camera inspection included
Truck-mounted negative-pressure vacuum system
Antimicrobial fogging after cleaning
MERV-13 media filter upgrade option
UV-C air purifier installation available
Whole-home humidifier and dehumidifier installs

Common issues we fix

Dust reappearing quickly after cleaning

Duct leaks pulling in attic or crawlspace particles

Musty smell from vents

Mold or mildew growth in ductwork or on coil

Allergy symptoms worsening indoors

Standard 1-inch filter not capturing fine particles

Request service

Rebates up to $2,000

Heat Pumps & Mini-Splits

Quiet, efficient heating and cooling in one system.

Ductless mini-splits for that one always-hot room, or full home heat pump conversions with Inflation Reduction Act rebates and financing built into the quote. Heat pumps can cut heating costs by up to 50% over gas in mild climates.

Mitsubishi, Daikin, and Bosch systems stocked
IRA federal tax credit up to $2,000 applied at quote
Ohio utility rebates up to $800 identified for you
Hyper-heat models that work down to -13 F
Multi-zone mini-split systems up to 8 zones
Full dual-fuel hybrid heat pump options available

Common issues we fix

Heat pump blowing cool air in heat mode

Defrost cycle active, refrigerant issue, or reversing valve fault

Ice forming on outdoor unit

Normal in cold weather; abnormal if present in mild temps (refrigerant low)

System runs continuously

Undersized for heating load or thermostat set too high

Request service

Custom service agreements

Light Commercial

Restaurants, offices, and retail under 25 tons.

Rooftop unit service, replacement, and preventative maintenance contracts that keep your business comfortable and your tenants happy. We offer priority commercial SLAs with guaranteed response times.

Rooftop unit (RTU) service and replacement
Commercial refrigeration equipment service
Planned preventative maintenance contracts
Priority 4-hour response SLA available
Multi-location service agreements
Kitchen exhaust and make-up air systems

Common issues we fix

RTU not cooling entire space

Dirty coil, refrigerant leak, or failed economizer

High utility bills in commercial space

Oversized or aging equipment running inefficiently

Request service

Northstar tech installing a new high-efficiency AC system

New installations

We size it right, every time.

Most HVAC contractors size equipment by square footage alone. We run a full ACCA Manual J heat-load calculation that accounts for insulation values, window area, orientation, and occupancy. An oversized system short-cycles. An undersized system never catches up. The right size runs efficiently for 20 years.

Every install quote includes three equipment options at different efficiency tiers with honest payback math. You choose the one that makes sense for your budget and goals.

Get a free estimate

Equipment we install and service

Brands we know inside and out.

Trane

Preferred partner, best-in-class reliability

Carrier

Full residential and light commercial line

Lennox

High-efficiency systems up to 28 SEER2

Mitsubishi

Mini-split and heat pump specialist

Daikin

Ductless and VRF systems

Goodman

Budget-tier option with solid warranty

Bosch

Inverter heat pumps and mini-splits

Rheem

Service and repair on all models

We service all major residential brands regardless of where they were purchased or installed. Brand not listed? Call us.

Credentials

Certified. Licensed. Background-checked.

NATE Certification

North American Technician Excellence is the gold standard of HVAC competency testing. Every Northstar tech passes before taking a solo call.

EPA 608 Universal

Required federal certification for handling and recovering refrigerants. All of our techs hold the Universal (all-refrigerant) level.

Ohio HVAC License

State of Ohio contractor license #OH-12784. All installs and refrigerant work are fully permitted and inspected.

Trane Comfort Specialist

Factory-authorized designation that requires ongoing training and a minimum customer satisfaction threshold each year.

BPI Building Analyst

Building Performance Institute certification for whole-home energy analysis and efficiency upgrade scoping.

Our guarantee

Warranty coverage at a glance.

What is covered	Coverage	Notes
New system parts	10 years	Registered with manufacturer within 30 days of install
New system labor	5 years	Northstar-backed, not subject to manufacturer terms
Qualifying premium systems	10-year labor	On select Trane XV and Carrier Infinity installs
Repair parts	1 year	On all parts installed by Northstar technicians
Repair labor	1 year	If the same issue recurs, we return at no charge
Duct cleaning	2 years	If duct contamination returns within 2 years, we re-clean free

Ready to schedule?

Book online for routine service or call our 24/7 dispatcher for anything urgent. We confirm every appointment within the hour.

Book service online (513) 555-0142

Services that keep your home running.

AC & Furnace Repair

New System Installation

Maintenance Plans

Duct Cleaning & Indoor Air Quality

Heat Pumps & Mini-Splits

Light Commercial

We size it right, every time.

Brands we know inside and out.

Certified. Licensed. Background-checked.

Warranty coverage at a glance.

Ready to schedule?

No heat? No AC? Call now.