HVAC in Manchester is a volume problem in the mills and a boiler problem in the wood houses. Tall windows and high ceilings in an Amoskeag building swallow heat. Brick stays cold. Leftover steam or a later system may be trying to serve lofts that were not rooms when the pipes went in. On the West Side, one boiler and radiators still knock through a three-family. North End houses may have hot water or a furnace. Start with the building.
A cold loft and a warm lower floor can be air in the pipes, a failed vent, or simply too much glass. A fuel smell or soot is a different call. Basements in mill buildings are large, damp, and full of old equipment somebody is afraid to touch. Tanks weep. Chimneys and flues may be the wrong size for what is attached now. A CO alarm ends the experimenting. Say what you smell.
Ductless heads get stuck on brick walls and still do not fix a steam system or a single-pane wall of windows. Outdoor units sit in courts and on roofs where service is awkward. They do not stop ice dams on the wood houses. Summer humidity in the valley loads a brick building even on a day that is only warm. Radiator leaks print on the ceiling below and get blamed on the roof. Say whether the wet spot is under a radiator or under a bath.
If one plant serves many units, a no-heat call is a building call. Say whether you control the boiler or only the radiator in your room. Window units in mill sash drip and rattle. Condensate lines freeze. Backup heat matters when the power drops. You do not need the model plate from a dark mechanical room. You need the fuel, the symptom, and the floor.
Have the neighborhood and mill or house. Say no heat, a smell, a leak, or a loft that never gets comfortable because of the glass. Mention shared equipment if other households are cold too. Call the number on this page.