Pest Inspection Frequency Calculator

ANA›Life Services Authority›National Calculator Authority›Pest Inspection Frequency Calculator

.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Pest Inspection Frequency Calculator

Determine the recommended pest inspection frequency for your property based on property type, climate risk zone, pest history, and surrounding environment.

Property Type

Residential House Apartment / Unit Commercial Building Warehouse / Industrial Restaurant / Food Service Healthcare / Medical Facility

Climate / Risk Zone

Low Risk (Cool, Dry Climate) Moderate Risk (Temperate Climate) High Risk (Warm, Humid Climate) Very High Risk (Tropical / Subtropical)

Past Pest Infestation History

No History Minor (1 incident, resolved) Moderate (2–3 incidents) Severe (Recurring / Ongoing Issues)

Surrounding Environment

Urban (City Centre) Suburban (Residential Area) Rural / Near Farmland Near Bushland / Forest Near Waterway / Wetland

Building Age (years)

Timber Construction or Timber Flooring?

No Yes

Food Storage or Preparation On-Site?

No Yes

Calculate Inspection Frequency

function pesCalc() { // --- Read inputs --- const propertyType = document.getElementById('pes-property-type').value; const climateZone = document.getElementById('pes-climate-zone').value; const pestHistory = document.getElementById('pes-pest-history').value; const surroundings = document.getElementById('pes-surroundings').value; const buildingAgeRaw = document.getElementById('pes-construction-age').value.trim(); const timberConst = document.getElementById('pes-timber-construction').value; const foodStorage = document.getElementById('pes-food-storage').value;

// --- Validation --- if (buildingAgeRaw === '' || isNaN(buildingAgeRaw) || Number(buildingAgeRaw) 200) { document.getElementById('pes-result').innerHTML = 'Please enter a valid building age between 0 and 200 years.'; return; } const buildingAge = parseFloat(buildingAgeRaw);

// --------------------------------------------------------------- // FORMULA // Base inspection interval (months) by property type // --------------------------------------------------------------- // Base intervals (months between inspections): // residential_house = 12 // apartment = 12 // commercial = 6 // warehouse = 12 // restaurant = 3 // healthcare = 3 // --------------------------------------------------------------- const baseIntervalMap = { residential_house: 12, apartment: 12, commercial: 6, warehouse: 12, restaurant: 3, healthcare: 3 }; let baseInterval = baseIntervalMap[propertyType];

// Climate risk multiplier (reduces interval = more frequent) // low=1.0, moderate=0.85, high=0.70, very_high=0.55 const climateMultiplierMap = { low: 1.00, moderate: 0.85, high: 0.70, very_high: 0.55 }; const climateMultiplier = climateMultiplierMap[climateZone];

// Pest history adjustment (subtract months from interval) // none=0, minor=-1, moderate=-2, severe=-4 const historyAdjMap = { none: 0, minor: -1, moderate:-2, severe: -4 }; const historyAdj = historyAdjMap[pestHistory];

// Surroundings adjustment (subtract months) // urban=0, suburban=-0.5, rural=-1, bushland=-2, waterway=-2 const surroundingsAdjMap = { urban: 0, suburban: -0.5, rural: -1, bushland: -2, waterway: -2 }; const surroundingsAdj = surroundingsAdjMap[surroundings];

// Building age adjustment: // Age > 30 years: -2 months // Age 15–30 years: -1 month // Age 30) { ageAdj = -2; } else if (buildingAge >= 15) { ageAdj = -1; }

// Timber construction: -1.5 months (termite risk) const timberAdj = (timberConst === 'yes') ? -1.5 : 0;

// Food storage: -1 month (rodent/cockroach risk) const foodAdj = (foodStorage === 'yes') ? -1 : 0;

// --------------------------------------------------------------- // Final interval calculation: // adjustedInterval = (baseInterval × climateMultiplier) // + historyAdj + surroundingsAdj // + ageAdj + timberAdj + foodAdj // Clamped to minimum 1 month, maximum 24 months // --------------------------------------------------------------- let adjustedInterval = (baseInterval * climateMultiplier) + historyAdj + surroundingsAdj + ageAdj + timberAdj + foodAdj;

adjustedInterval = Math.max(1, Math.min(24, adjustedInterval));

// Round to nearest 0.5 adjustedInterval = Math.round(adjustedInterval * 2) / 2;

// Derive inspections per year const inspectionsPerYear = (12 / adjustedInterval).toFixed(1);

// Risk score for label (lower interval = higher risk)
let riskLabel, riskColor;
if (adjustedInterval 0
? '' + pestWarnings.map(w => '').join('') + ''
'';

// Build breakdown const breakdown = [ ['Base Interval (Property Type)', baseInterval.toFixed(1) + ' months'], ['Climate Multiplier Applied', '× ' + climateMultiplier.toFixed(2) + ' = ' + (baseInterval * climateMultiplier).toFixed(2) + ' months'], ['Pest History Adjustment', (historyAdj >= 0 ? '+' : '') + historyAdj + ' months'], ['Surroundings Adjustment', (surroundingsAdj >= 0 ? '+' : '') + surroundingsAdj + ' months'], ['Building Age Adjustment', (ageAdj >= 0 ? '+' : '') + ageAdj + ' months'], ['Timber Construction Adjustment', (timberAdj >= 0 ? '+' : '') + timberAdj + ' months'], ['Food Storage Adjustment', (foodAdj >= 0 ? '+' : '') + foodAdj + ' months'], ['Final Interval (clamped 1–24 months)', adjustedInterval + ' months'] ];

const breakdownHTML = breakdown.map(r => '' + r[0] + '' + '' + r[1] + '' ).join('');

document.getElementById('pes-result').innerHTML = '### Recommended Inspection Frequency ' + '' + intervalLabel + '

' + 'Risk Level: ' + riskLabel + '

' + 'Inspections Per Year: ' + inspectionsPerYear + '

' + warningsHTML + '#### Calculation Breakdown ' + '' + breakdownHTML + ''; }

#### Formula

Adjusted Interval (months) = (Base Interval × Climate Multiplier) + History Adjustment + Surroundings Adjustment + Age Adjustment + Timber Adjustment + Food Adjustment

Result is clamped between 1 month (minimum) and 24 months (maximum).

FactorValues Base IntervalHouse/Apartment/Warehouse: 12 mo | Commercial: 6 mo | Restaurant/Healthcare: 3 mo Climate MultiplierLow: ×1.00 | Moderate: ×0.85 | High: ×0.70 | Very High: ×0.55 Pest HistoryNone: 0 | Minor: −1 mo | Moderate: −2 mo | Severe: −4 mo SurroundingsUrban: 0 | Suburban: −0.5 mo | Rural: −1 mo | Bushland/Waterway: −2 mo Building Age<15 yrs: 0 | 15–30 yrs: −1 mo | >30 yrs: −2 mo Timber ConstructionYes: −1.5 mo | No: 0 Food Storage/PrepYes: −1 mo | No: 0

#### Assumptions & References

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References

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