Ontario · Energy · area guide · checked October 8, 2026

Heat loss calculations in Caledon

A heat loss calculation is how a heat pump or furnace gets sized, and its key input is the design temperature. In Caledon, the National Building Code's 2.5% January design temperatures run from −19°C at Brampton to −21°C at Orangeville, so a calculation for a house near Orangeville starts from a colder number than one near Brampton. Here's what that means for Bolton, Caledon East and Caledon Village and the rest of the area.

Get matched in Caledon → The CSA F280 heat-loss calculation
A kitchen table with a house floor plan, a laser measure, a tape measure and a laptop showing the plan

Design temperature

−19°C to −21°C

NBC 2020, January 2.5%

Heating degree-days

4,421

Orangeville MOE

Standard

CSA F280-12

Registered organizations

25

many offer F280 reports

How Caledon is built

Caledon's houses by when they were built Ten house shapes, one for each tenth of Caledon's 22,940 houses. Before 1961: 10%, 1961–1990: 32%, 1991–2000: 21%, 2001 or later: 36%. Older houses glow hotter.
  • Before 1961 10%
  • 1961–1990 32%
  • 1991–2000 21%
  • 2001 or later 36%
Each house stands for one in ten of Caledon's 22,940 houses (single-detached, semi-detached, row, duplex and mobile homes), drawn by when it was built. The glow shows the usual pattern: older houses tend to be leakier and less insulated. Snowfall scales with heating degree-days. Sources: Statistics Canada 2021 Census (table 98-10-0233-01), Environment and Climate Change Canada 1981–2010 climate normals (Orangeville MOE) and the National Building Code 2020 January design temperature for Brampton.

This page covers the Town of Caledon, the rural northern part of the Region of Peel, including Bolton, Caledon East, Caledon Village, Palgrave and the hamlets around them. Brampton and Mississauga have their own pages.

Design temperatures across Caledon

The National Building Code of Canada 2020 says the 2.5% January design temperature is the value ordinarily used to design heating systems. Its climate table lists these Ontario locations in or next to Caledon:

Location in the code’s tableJanuary 2.5% design temperatureHeating degree-days
Brampton−19°C4,100
Orangeville−21°C4,450

The code's climate table has no Caledon entry; Brampton and Orangeville are its nearest listed neighbours.

Environment and Climate Change Canada's 1981–2010 climate normal at Orangeville MOE (15.6 km from the middle of the area) is 4,421 heating degree-days a year, with a January mean of −7.5°C.

What CSA F280-12 asks for

The code requires the heating capacity for a house to be worked out with CSA F280, using the code's own design temperatures, and its list of referenced documents names the 2012 edition, CSA F280-12. The calculation works out how much heat each room loses on the design day, from the house's actual walls, windows, ceiling insulation and air leakage.

At −19°C to −21°C, a cold-climate heat pump sized to the calculation can carry most of the season, and the number shows how much backup heat the coldest days need.

What the calculation needs from your house

Of the 22,940 houses in Caledon (single-detached, semi-detached, row houses, duplexes and mobile homes), 10% were built before 1961 and 43% before 1991, according to the 2021 Census. In an older or renovated house, the walls, windows and air leakage rarely match the original plans, so ask the designer to measure rather than assume. Have this ready:

  • Room dimensions and ceiling heights, or a floor plan.
  • Window and door sizes and types, room by room.
  • Insulation levels in the attic, walls, basement and any floor over an unheated space.
  • A blower door result from an EnerGuide evaluation, if you've had one.
  • Where the ducts, radiators or baseboards run, so the heat can be delivered room by room.

What it costs

There's no standard published price for a standalone F280 calculation, so ask two or three providers for a written quote that names the deliverable: the room-by-room F280 report, not just an equipment size. Many energy advisors bundle it with an EnerGuide evaluation, which also gives the calculation measured air-leakage data instead of an assumption. Ask whether a rural travel fee applies. The CSA F280 heat-loss calculation explains the method and typical cost bands.

Communities we cover in Caledon

Every town, village and hamlet below is part of this page, grouped by municipality (2021 Census population).

  • Town of Caledon 76,581Alton, Belfountain, Bolton, Caledon East, Caledon Village, Cheltenham, Inglewood, Palgrave

Covered on city pages: Brampton (Springbrook).

NRCan-registered service organizations serving Caledon

NRCan's list of service organizations (checked October 8, 2026) shows 25 organizations registered for postal codes in Bolton, Caledon and Caledon Village (L7E, L7C, L7K). Registration means an organization lists those postal areas, not that it has an advisor in town: confirm they travel to your community, and ask about wait times and travel fees.

Only assessments from the seven HRSP-approved organizations qualify for the $600 Home Renovation Savings rebate and its assessment-path upgrade rebates; each listing below says whether it's one of them.

Source: NRCan list of service organizations, checked October 8, 2026, matched by forward sortation area (L7E, L7C, L7K). Call to confirm your road is covered.

Heat pump programs in Caledon

Provincial · needs an evaluation Home Renovation Savings — Home Energy Assessment path Up to $10,000 per home ($5,000 if heated with Enbridge gas), including $600 back on your two assessments, for insulation, windows, air sealing and more — if the follow-up assessment is done by December 31, 2026 Open · deadline Provincial Home Renovation Savings — direct rebates (no assessment) Heat pumps up to $7,500 ($12,000 ground-source), solar with battery up to $10,000, plus attic, thermostat and appliance rebates — no assessment needed Open Federal National Heat Pump Rebate Announced October 8, 2026 and opening early 2027: up to $10,000 below the median income, $2,000 for other eligible homeowners Announced · opens 2027 Federal CMHC Eco Improvement premium refund A 25% energy-efficiency rebate on your CMHC mortgage insurance premium after $20,000 of energy renovations Open

Heat loss calculations in Caledon: common questions

What design temperature is used for heat pump sizing in Bolton?

The National Building Code 2020's climate table gives −19°C for Brampton and −21°C for Orangeville. Provincial codes can use their own climate tables, so ask which value the calculation uses.

What is CSA F280-12?

The 2012 edition of CSA F280, Determining the required capacity of residential space heating and cooling appliances. The National Building Code 2020 requires heating capacity for a house to be determined with it.

How much does a heat loss calculation cost?

There is no standard published price. Ask two or three providers for a written quote for the F280 report, and ask whether it costs less bundled with an EnerGuide evaluation and whether a travel fee applies.

Who does F280 calculations in Caledon?

Many of the 25 NRCan-registered organizations that list Bolton, Caledon and Caledon Village postal codes offer them, as do HVAC designers. Ask for the F280 report itself, not just an equipment size.

Sources

Checked October 8, 2026. Census figures are 2021 totals for the municipalities listed; the climate normal is Environment and Climate Change Canada's station Orangeville MOE (15.6 km from the area's centre point).

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