Demonstration site. Northline Heating & Cooling is a fictional business created by MareCraftAI to show how a trade website and its AI assistant work together. No company, person, price or service described here is real.

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Services

Residential heating and cooling. Repair first, replacement when the arithmetic says so.

Heating

Furnace repair

Igniters, flame sensors, blower motors, control boards and pressure switches. The van carries the parts that fail most often, so a common fault is generally fixed on the first visit. Where a part has to be ordered we tell you the wait before we leave.

Furnace replacement

Sized to the house rather than to whatever was there before, because an oversized furnace short-cycles and costs more to run. We explain efficiency ratings in terms of what they save on a house like yours.

Boilers and radiant heat

Service and repair on hot water systems, including circulator pumps, expansion tanks and zone valves. Older homes across the city still run these and they are worth keeping running.

Maintenance plans

A scheduled visit before each season: clean, inspect, test safeties, replace filters, and flag anything trending toward failure. Plan holders get priority booking when something breaks, which in February is the part that matters.

Cooling

Air conditioning service and repair

Coil cleaning, refrigerant checks, capacitor and contactor replacement, condensate problems. Spring is the quiet season to book. In a heat wave we triage, and homes with medical need or small children come first.

Air conditioning installation

Central air fitted to the ductwork you have where it can carry it, and an honest conversation about airflow where it cannot. Ductless options for additions and older homes without ducts.

Water and air

Water heaters

Tank and tankless, repair and replacement. Tankless suits some houses very well and others poorly, and the deciding factor is usually gas line size and venting rather than preference.

Indoor air quality

Whole-home humidifiers, media filtration and HRV service. Winter dryness and summer stuffiness are usually solvable without touching the furnace itself.

Ductwork and airflow

One cold bedroom is rarely a furnace fault. We measure airflow, check returns and balance the system before anyone talks about new equipment.

Thermostats and controls

Replacement and setup, including programmable and smart thermostats. We check the wiring your system actually has before recommending one, because not every furnace supports every control.

Not sure which one you need?

Describe what the system is doing and we will tell you whether it is a service call, a maintenance item, or something that can wait.

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