Reconcile one completed U.S.-customary steady-state sensible greenhouse heat-loss record across surface, perimeter and infiltration components.
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A quick decision brief for this specific tool
Inputs that matter
One de-identified completed grower, engineer/designer or reviewed-training U.S.-customary steady-state sensible greenhouse heat-loss record; responsible calculation/revision/date/reviewer; exact structure/heated zone and closed operating envelope; location/design-weather and indoor/crop-condition sources; exposed-surface schedule and effective whole-assembly U-factor; perimeter/foundation method and coefficient; enclosed volume, closed-condition ACH and source infiltration heat factor; wind/opening, thermal-screen/insulation, excluded solar/ground/latent/dynamic, equipment/distribution, fuel/electrical/venting, controls/alarm/redundancy, safety/code, tolerance and review/retention records; indoor and outdoor °F; completed four-component source; and an optional same-basis independent source with all four load values
Output to expect
Design temperature difference; reproduced exposed-surface transmission, perimeter and closed-condition infiltration losses; their steady-state sensible total; completed component, total and internal-sum differences; and optional independent same-basis differences
How it works
Validate every provenance field, exact record-basis choice and bounded U.S.-customary value; require indoor design temperature above outdoor design temperature; multiply exposed area by effective surface U-factor and ΔT, perimeter by its linear coefficient and ΔT, and enclosed volume by closed-condition ACH, the source infiltration heat factor and ΔT; sum the three components without an automatic margin; preserve signed completed differences; require the optional independent source and four values all-or-none; reject nonfinite or unsupported loads; and normalize only mathematical zero
Confirm that structure/zone, closed operating state, design-weather scenario, indoor setpoint, surface schedule/U-factor, perimeter method, volume/ACH/factor, wind/opening condition, thermal-screen state, exclusions, completed record and optional independent record all match. Another building, zone, state, location/scenario, coefficient, method or revision needs another run.
Use the result only for one completed steady-state sensible component and transcription check. It does not choose design weather or crop/root-zone/humidity targets; derive geometry, U/R values, air changes or factors; include solar, ground, latent, moisture, crop, storage or transient loads unless already in the responsible method; set a safety/recovery margin; size or select equipment; validate efficiency, derating, fuel, electrical supply, venting, distribution, controls, alarms, redundancy, CO/fire/code safety or tolerance; or authorize purchase, installation, commissioning or operation.
Choose your path
Built around the job you need to finish
Reconcile one completed U.S.-customary steady-state sensible greenhouse heat-loss record across exposed-surface transmission, perimeter and closed-condition infiltration components without choosing design conditions, adding a margin, sizing equipment or approving safety.
Grower checking one completed greenhouse load record
Replace the floor-dimension shortcut and universal glazing assumption with the exact envelope and operating-state records used by the completed calculation.
Freeze the heated zone, closed envelope, weather/setpoint source, surface/perimeter/volume schedules, coefficients and infiltration method before entering component totals.
Sees reproduced surface, perimeter, infiltration and total sensible losses plus signed completed differences without a heater recommendation.
Designer or energy reviewer reconciling components
Detect an omitted perimeter/infiltration term, mismatched screen state or component-sum transcription error before accepting the load record.
Align the exact U.S.-customary bases, design temperatures, effective coefficients, ACH/factor and exclusions, then inspect component and internal-total differences.
Gets traceable five-step arithmetic while solar, ground, latent, transient and equipment-design decisions remain explicit external records.
Safety or commissioning reviewer checking independent evidence
Prevent a different weather scenario, envelope condition, coefficient or load scope from being presented as corroboration or safety approval.
Enter the optional independent source and all four heat-loss values only when every structure, state, method and exclusion matches.
Receives deterministic all-or-none validation and separate independent differences without a fuel, electrical, venting, CO, fire, code or commissioning conclusion.
Authoritative checks for this tool
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
Use one de-identified completed grower, engineer/designer or supervised-training record. Identify the exact heated zone, closed envelope and screen state, location/weather scenario, indoor setpoint, crop/humidity basis, wind/opening condition and exclusions; the Tool selects none.
Reproduce three distinct components
Multiply source-approved exposed area by its effective whole-assembly U-factor and temperature difference. Calculate perimeter loss on its linear-foot coefficient. Calculate closed-condition infiltration from approved volume, ACH, source heat factor and the same temperature difference.
Qsurface = A × U × ΔT; Qperimeter = L × P × ΔT; Qinfiltration = V × ACH × factor × ΔT
Sum without an invented margin
Add the reproduced surface, perimeter and infiltration loads only. Solar, ground, latent/moisture, crop, storage, transient recovery and other effects stay in their responsible calculation records; no platform percentage is added.
Qtotal = Qsurface + Qperimeter + Qinfiltration
Compare completed and independent records
Report signed differences for each component and the total, plus whether each entered total equals its own component sum. An optional independent check is accepted only with one same-basis source and all four values.
Updated: August 2026
Example Scenarios
Reconcile one reviewed structure and screen state using its exposed-surface schedule, perimeter method, enclosed volume, closed-condition infiltration method and source-owned indoor/outdoor design temperatures.
Run a separate record after covering, shutter, leak-sealing or thermal-screen evidence changes; never reuse the earlier effective U-factor or ACH as though the operating state were unchanged.
Compare another calculation only when its structure, state, design temperatures, surface/perimeter/volume schedule, coefficients, infiltration factor and load exclusions match exactly.
Common Mistakes to Avoid
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Using one fixed U-factor and an approximate cuboid surface
✓
Copy the reviewed actual surface schedule and effective whole-assembly coefficient for the exact cover, frame, screen, seals and closed operating condition.
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Omitting perimeter or infiltration loss
✓
Retain the responsible perimeter method and closed-condition volume, ACH and heat factor; surface transmission alone is not the completed greenhouse total.
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Converting heat loss directly into a purchase-ready heater size
✓
Keep safety/recovery margin, equipment capacity/efficiency/derating, distribution, fuel/electrical/venting, controls, redundancy, safety, code and commissioning with qualified responsible records.
FAQ
No. It reproduces one completed steady-state sensible heat-loss record. Equipment capacity, safety or recovery margin, efficiency and derating, distribution, fuel/electrical/venting, controls, redundancy and commissioning require responsible design.
Greenhouses can be gable, curved, gutter-connected, partitioned or mixed-material structures. Use the responsible exposed-surface, perimeter and volume schedule so floor area, roof slope and exclusions are not invented.
From the responsible whole-assembly and infiltration method for the exact covering, framing, screen, seals, openings, maintenance, wind and operating state. The Tool supplies no default table or universal value.
Use the exact location, dataset, percentile or scenario approved in the completed calculation. A climate normal, typical-year value, forecast, historic extreme and code/design value are not interchangeable.
No. This engine reproduces only surface, perimeter and closed-condition sensible infiltration components. Name solar, ground, latent/moisture, crop, storage and transient effects as exclusions or retain their separate responsible model.
No. Fuel-burning and electric equipment can create fire, electrical, combustion, venting and carbon-monoxide hazards. Follow current manufacturer instructions, qualified design/installation/inspection and applicable authority requirements.
About Reviewed Greenhouse Heat-Loss Record
Check one completed greenhouse sensible heat-loss calculation without turning a floor rectangle, universal glazing value or automatic margin into heater advice. Freeze the exact structure and closed operating state, location and design temperatures, measured surface/perimeter/volume schedule, effective coefficients, air-change method and completed component record before reproducing the arithmetic.
