Start with the problem you want solved
No heat, short heating cycles and a room that stays cold need different descriptions.
Cottonwood Heights: planning the visit
A room that struggles to hold temperature deserves a room-specific description. Tell the HVAC contractor about the level of the house, window exposure and whether the problem affects heating, cooling or both. Ask whether the proposal addresses airflow and controls as well as the equipment; a larger unit is not automatically the answer.