Where the Photos Came From

Real photographs

These photographs come from Wikimedia Commons. Each is used under the license named here, cropped to fit the page and, where noted, with a logo, sign or plate blurred. The original files are linked so you can see them uncropped.

• Picture 3: Downtown Louisville and its riverfront seen across the Ohio River on a clear late-summer day. Photo by King of Hearts, CC BY-SA 4.0, original file. A logo or marking was blurred.
• Picture 11: Snow on parked cars and brick row houses along a city street, a large bare tree overhead. Photo by Warren LeMay from Cincinnati, OH, United States, CC0, original file. A logo or marking was blurred.
• Picture 14: A ductless mini-split indoor unit mounted high on a room wall between curtained windows. Photo by ArnoldReinhold, CC BY-SA 4.0, original file. A logo or marking was blurred.
• Picture 27: A residential gas meter with dials and gray piping on the siding of a house. Photo by Tim36272, CC BY-SA 3.0, original file. A logo or marking was blurred.
• Picture 28: Morning fog filling a valley among wooded hills in the Red River Gorge, Kentucky. Photo by Aaron Vowels, CC BY 2.0, original file.
• Picture 35: Downtown Cincinnati under a gray winter sky, snow on rooftops and hillside streets in the foreground. Photo by Sean P Bender, CC BY-SA 3.0, original file. A logo or marking was blurred.

Generated pictures

Heat Pump Weather writes about real houses, but free photographs of some scenes do not exist: a heat pump steaming through a defrost cycle, frost on coil fins, a unit cleared of snow with a broom beside it. For those, the site uses photo-realistic pictures made with an image model from a written description. None of them shows a real home, person or product, and each carries the caption "AI-generated picture, not a real home" wherever it appears. They have no maker logos or lettering.

The 30 generated pictures show:

• Picture 1: A two-story red-brick house with frost on the lawn and bare trees at sunrise, a heat pump outdoor unit beside it.
• Picture 2: A black plank fence across a lightly snow-covered horse pasture, two horses and a dark barn in the distance under a gray sky.
• Picture 4: Two installers lifting a new outdoor unit onto a pad beside a brick ranch house, a redbud in pink bloom behind them.
• Picture 5: A heat pump outdoor unit on a concrete pad against a brick wall, insulated refrigerant lines running into the house.
• Picture 6: A heat pump outdoor unit with white frost on its coil, on a frosted lawn beside a vinyl-sided house.
• Picture 7: A heat pump outdoor unit beside a snowy back deck at dusk, warm light in the windows of a brick house.
• Picture 8: A closed indoor air handler cabinet in an unfinished basement, metal ductwork rising from its top.
• Picture 9: A heat pump outdoor unit in the snow giving off a cloud of steam during a defrost cycle.
• Picture 10: A hand reaching toward a plain white wall thermostat with a blank screen in a hallway.
• Picture 12: A gas furnace in a basement with a metal coil cabinet on top and a small round carbon monoxide alarm on the block wall.
• Picture 13: Condensation beading on a window on a muggy summer morning, a leafy green yard beyond.
• Picture 15: A tall outdoor heat pump unit that looks too big beside a small white one-story house in summer.
• Picture 16: A woman rinsing the coil of an outdoor unit with a garden hose, shrubs set well back from it in a mulch bed.
• Picture 17: A man measuring a living room window with a tape measure, a clipboard on the sill, afternoon sun.
• Picture 18: A ductless outdoor unit on a wall bracket beside a window, a line-set cover running up the siding.
• Picture 19: A heat pump outdoor unit on a raised metal stand with deep snow piled around it.
• Picture 20: A worn old outdoor unit with faded, rust-streaked panels and crushed fins beside a brick house, autumn leaves around it.
• Picture 21: A row of new unlabeled outdoor heat pump units on pallets in a supply warehouse.
• Picture 22: A technician holding a tablet talks with a homeowner beside an outdoor unit in a backyard.
• Picture 23: A hand sliding a clean white pleated filter into the filter slot of an air handler.
• Picture 24: Insulated and bare copper refrigerant lines running from an outdoor unit's valves into a sided house wall.
• Picture 25: A round glass-domed electric meter on the brick outside wall of a house.
• Picture 26: A couple at a kitchen table looking over paperwork, a coffee mug beside them, morning light.
• Picture 29: A country road between black plank fences through green horse pastures, big shade trees alongside.
• Picture 30: Close-up of feathery frost on the coil fins behind a heat pump's grille.
• Picture 31: A heat pump outdoor unit cleared of snow in a snowy side yard, a broom leaning on the wall and a gutter above.
• Picture 32: A white ductless indoor unit on the wall above a bed in a calm bedroom.
• Picture 33: A small plain white carbon monoxide alarm on a hallway wall beside open bedroom doors.
• Picture 34: A white PVC condensate line running from an air handler across a basement floor to a floor drain.
• Picture 36: A whole-house humidifier on an air handler's duct with its cover off, white mineral scale crusted on its pad.

Charts

The chart cards on each page are drawn for this site from the numbers in that page's text, with the source named on the card. They add no figures of their own. If a number on a card ever disagrees with the text, the text and its linked source are the ones to trust.