NABCEP SHSI study plan

Compute daily and monthly space-heating and DHW loads from degree-day and draw-volume data for two sample homes

Size a flat-plate collector array to meet 50% and 70% solar fractions, and compare the resulting area and storage volumes

Calculate collector-loop flow rate from manufacturer-specified flow per collector and check it against pipe sizing limits

Derive expansion-tank acceptance volume and precharge pressure for a closed glycol loop with a known static height

Select pipe, insulation, and pump materials rated for the maximum stagnation temperature of the chosen collector

Apply freeze-protection rules for glycol concentration and drainback slope to a design layout

Identify the code and standard clauses that govern potable-water separation in a combi system and list the required backflow devices

Check a design against collector mounting wind and snow-load requirements for the local jurisdiction

Lay out a collector array on a roof plan showing row spacing, tilt, azimuth, and penetration locations

Write a step-by-step installation sequence from roof flashing through collector connection, piping, and insulation

Specify pipe supports, expansion compensation, and high-point air removal for a pumped glycol loop

Plan the sensor placement and wiring routes for collector, tank, and outdoor reset sensors before rough-in

Assemble a glycol loop by instruction, including flushing, mixing to the target concentration, and pressure testing

Verify relief valve discharge piping, vacuum relief, and check-valve orientation against the schematic

Document torque values, insulation joints, and labeling required for inspection

Explain the electrical disconnect and controller wiring requirements that apply to a residential solar thermal installation

Commission a system by setting controller parameters, pump speed, and differential setpoints to design values

Measure and record flow rate, inlet and outlet temperatures, and pressure drop, then compute delivered collector output

Diagnose three seeded faults (air lock, reversed sensor, low glycol concentration) from symptom descriptions alone

Write a commissioning report that compares measured performance with the design prediction

Build a troubleshooting decision tree covering no-flow, low delta-T, overheating, and repeated air accumulation

Interpret controller error codes and sensor resistance readings to isolate a failed component

Draft a 12-month maintenance schedule listing glycol testing, anode inspection, relief-valve exercise, and pump checks

Practice a customer handover walkthrough explaining stagnation behavior, vacation settings, and freeze alarms

Evaluate a glycol sample report and decide whether to top up, dilute, or replace the fluid

Inspect insulation, flashing, and mounting hardware for degradation and record findings in a condition report

Analyze a year of logged performance data to spot seasonal underperformance and propose corrective actions

Explain how to safely isolate and drain a loop for service, including stagnation and scald precautions

Complete a timed 100-question practice set weighted by domain percentage and review every missed item

Re-derive the five most error-prone calculations (solar fraction, expansion tank, flow rate, delta-T output, freeze point) from memory

Summarize each domain's key code references and safety limits on a single reference sheet

Identify remaining weak areas and schedule targeted review before exam day