- Dover, NH — Seacoast New Hampshire & Surrounding Areas
Garrison City HVAC is Dover's family-owned heating, cooling, and ventilation contractor. Residential and commercial. Fast, reliable, and honest.
From routine tune-ups to full system installs — we handle it all, on time and done right.
01
Sales, service, and installation of ductless mini-split systems — an efficient, flexible solution for whole-home or zone-specific comfort.
02
Sales, service, and installation for oil burners, gas burners, boilers, furnaces, heat pumps, and water heaters.
03
Central AC, heat pumps, and air handlers. New installs, tune-ups, and repairs to keep you cool all summer.
04
HRV/ERV systems, air filters, humidifiers, dehumidifiers, and wifi-enabled thermostats and controls.
05
Annual tune-ups and inspections that keep your system running efficiently and catch problems before they become expensive ones.
06
Ready to schedule? Contact us for a free estimate or to book a service call. Emergency service available — existing customers receive priority response.
We're not a national chain with a call center. When you call Garrison City, you get someone who knows your equipment, knows the Seacoast, and shows up when they say they will.
You're a customer, not a ticket number. We treat your home like our own.
We know a broken furnace can't wait. We get there quickly and get it right.
No upsells you don't need. We'll tell you exactly what's wrong and what it costs.
From a single-family home to a full commercial cooling system — we've done it.
Based in Dover — we serve the greater Seacoast region of New Hampshire.
Call us today or fill out our service request form. We'll get back to you fast — no runaround, no pressure.
Licensed & Insured · Residential & Commercial · Emergency Service Available