ZEROHOUSE KNOWLEDGE
Practical guidance, design questions and sources: Heating & Cooling.
Heating capacity is determined from the design heat loss of the particular building and its rooms. Annual energy consumption and floor area alone are not enough to select equipment.
Heating-load calculation addresses losses under specified outdoor conditions; seasonal assessment addresses demand over time. Cooling also needs solar, occupant and appliance gains and opportunities to remove heat. Floor area alone cannot reliably select a system. This section connects loads with sources, distribution and controls.
Winter decisions involve the enclosure, ventilation losses and junctions; summer decisions involve shading and gains. Passive measures do not necessarily eliminate services. The remaining load still needs to be met under the required conditions. Emitter selection also depends on rooms, operating temperatures and how quickly the system must respond to changes in use.
Heat pumps depend on source and supply temperatures, electric heating on available capacity and schedules, and cooling on humidity and condensate. Every system needs consideration of part-load operation. Excess capacity does not always improve use. Read a rated efficiency point together with its conditions and auxiliary consumption rather than extending it to an entire season.
Decide whether you are selecting a source, checking room distribution or investigating discomfort. The guides address underfloor heating, heat pumps, resistance heating and passive or active cooling. Prepare plans, assemblies and operating patterns. The simplified calculator supports an initial comparison of assumptions; design needs a complete model and agreed comfort criteria. Matching the question to the relevant part of the system is more useful than replacing equipment before understanding the load it is expected to serve.
