# Heat Pump Sizing Canada — CSA F280 Heat Loss Calculator

> CSA F280 Heat Loss Calculator (iPhone/iPad app by Mike Watson.)

- Source: https://appshunter.io/ios/app/heat-pump-sizing-canada/id6784766138 (this page in markdown: same URL + `.md`)
- Developer: [Mike Watson](https://appshunter.io/developer/1848411021)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 16.0 · 46 MB
- Languages: American English
- Released: 2026-07-12
- Data updated: 2026-09-10
- User reviews in markdown: https://appshunter.io/ios/app/heat-pump-sizing-canada/id6784766138/reviews.md

## What is Heat Pump Sizing Canada?

Size a heat pump for a Canadian home in minutes — and get the numbers rebate and permit applications ask for.

Enter a postal code and the basics of the house. Heat Pump Sizing Canada resolves the design temperature from NRCan weather data, calculates the design heat loss and heat gain with CSA F280-12 methodology, and shows the heat pump size that fits: capacity at the design temperature, balance point, and how much backup heat the home needs on the coldest day.

HOMEOWNERS get a plain-language estimate to take to a contractor. CONTRACTORS get Pro Mode — measured R-values, wall area, NFRC window ratings, HRV/ERV recovery — and a branded PDF with a Heat Pump Sizing Summary for rebate and permit documentation.

HEAT PUMP SIZING
Enter a specific unit's rated heating capacity at 47 °F and 17 °F from its AHRI or NEEP listing and the app evaluates that unit: balance point, capacity at your design temperature, backup heat required.

BUILT FOR CANADIAN HVAC PROS
Metric by default — m², kW, RSI, °C — with a full imperial toggle throughout the app and PDF exports.

THREE LEVELS OF ACCURACY
Simple Mode – 7 inputs: Regional climate benchmarks from your Canadian postal code and floor-area factors. Get an estimate in under 60 seconds with zero measurements. Perfect for quick quotes and initial sales conversations.
Moderate Mode — 16 inputs: Component-level factors — insulation grade, windows by orientation, foundation, blower-door ACH50, CSA F326 ventilation — with a conservative safety buffer. Prevents undersizing while staying accessible for non-engineers. The sweet spot for standard replacement jobs.
Pro Mode – your measured values: assembly R-values (RSI), actual above-grade wall area, basement wall depth and below-grade insulation, NFRC window U-factor and SHGC, and HRV/ERV heat recovery. Every input feeds the CSA F280 calculation directly. Free – no upgrade.

BUILT FOR CANADA
Enter your postal code — we resolve province, city, and design conditions from NRCan HOT2000 weather data mapped to your Forward Sortation Area (FSA). Coverage from mild coastal BC to Arctic climates.

WORKS IN THE FIELD
Offline-first — no signal in the basement? Everything runs locally. Auto-save projects. LiDAR room scan (iPhone and iPad Pro) fills floor area, ceiling height, windows and wall perimeter from a walk-through. Professional PDF reports — the document you hand to a homeowner, an inspector, or a rebate application. Tagged site photos with location labels and notes in report appendices. Optimized for iPad.

THE MATH YOU TRUST
Calculations follow CSA F280-12 residential space heating and cooling load methodology:
– Heating load (kW or BTU/hr)
– Cooling load — sensible and latent (kW or BTU/hr)
– Recommended AC or heat-pump size – real catalog sizes inside the F280 sizing window
– Heat pump balance point, capacity at the design temperature and backup heat
– Recommended furnace or heating appliance size (5,000 BTU / kW increments)
– CSA F326 continuous ventilation and HRV/ERV recovery
– Below-grade and foundation heat loss
– Equipment sizing guidance for AC, furnace, and heat pump options
– Full component breakdown – walls, ceiling, windows, doors, foundation, infiltration, ventilation, latent – that adds up to the headline load
Follows CSA F280-12 methodology — the standard referenced across Canadian residential HVAC practice. Not affiliated with or certified by CSA or HRAI.

PERFECT FOR
HVAC contractors, installers, and service techs across Canada. Heat pump and dual-fuel system installers. HRV/ERV installers sizing ventilation loads. Sales teams quoting new systems. Independent contractors building their business. Energy advisors and high-performance builders. Contractors preparing load documentation for provincial heat-pump rebate programs and permit applications. Homeowners comparing heat pump quotes.

No account. No setup. Just open the app and get to work.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/


## Version history (last 5 releases)

### 1.5.0 — 2026-09-08

Heat Pump Sizing Canada — same CSA F280-based engine, now built around the question Canadians are asking.

• Heat Pump Sizing card and PDF summary: design heat loss, capacity at the design temperature, balance point, backup heat.
• Enter a unit's rated 47 °F / 17 °F heating capacities (AHRI/NEEP) and evaluate that exact heat pump.
• Homeowner quick estimate: postal code + house basics → a plain-language heat pump answer.
• Rate us after your first PDF — it helps other Canadians find the app.

Questions or ideas? Settings → Send Feedback — we read everything.

### 1.4.0 — 2026-08-26

Pro Mode is here — and it's free.

 • Enter your measured values: assembly R-values (RSI), actual above-grade wall area and perimeter, basement wall depth and below-grade insulation, NFRC window U-factor and SHGC, and HRV/ERV recovery efficiency. Every Pro input feeds the CSA F280 calculation directly.
 • The load breakdown now lists every F280 component — walls, ceiling, window conduction and solar, doors, foundation, infiltration, ventilation and latent — and it adds up to the headline load.
 • Equipment sizing snaps to real catalog sizes inside the F280 sizing window, and tells you when no standard unit fits.
 • Cleaner forms: inputs the F280 method doesn't use are gone.
 • PDF reports list the Pro overrides you entered.
 • New sanity checks catch window areas that can't fit the walls they sit in.

Questions or ideas? Settings → Send Feedback — we read everything.

### 1.3.0 — 2026-08-17

• NEW: Point at a wall to set window direction — the built-in compass fills in your north/south/east/west window areas for you
• Works hand-in-hand with LiDAR room scanning: confirm each scanned room's window direction right on the review screen
• Clear accuracy indicator with one-tap correction — you always confirm before anything is saved
• More accurate solar gains in your CSA F280 loads, with less typing on site

### 1.2.0 — 2026-08-14

NEW: LiDAR Room Scanning
• Scan rooms with your iPhone to measure floor area, ceiling height, and windows automatically (requires a LiDAR iPhone — 12 Pro or later)
• Review everything before it's applied: floor tags, walls facing outside, window counts, and per-room notes
• Prefer a tape measure? Add rooms by hand with the same review flow
• Even a partial scan pays off — one room adds measured details to your report

BETTER PDF REPORTS
• Room measurements table and true-scale floor plan sketches, grouped by floor
• Your letterhead and branding now appear on every page
• Cleaner layout and more consistent totals throughout

### 1.1.1 — 2026-08-07

• Under-the-hood improvements to app startup and reliability
• Added anonymous, privacy-first usage analytics to help us improve the calculator — nothing personal is collected, and you can opt out anytime in Settings
• Groundwork for upcoming features

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All apps by Mike Watson: https://appshunter.io/developer/1848411021

## Related topics

[hvac load calculator csa f280](https://appshunter.io/ios/topics/hvac-load-calculator-csa-f280)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-10.*