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How Heat Actually Moves

May 7, 2026 5 min read

A plain-talk explainer. Same fuel. Same energy. Two completely different barns. The difference isn't in the equipment specs — it's in the physics of how heat is delivered.

The Three Ways

There are only three ways heat moves.
Conduction, convection, and radiation.

Every heating system on earth — every fire, every radiator, every furnace, every infrared tube — moves energy using one or more of these three mechanisms. Understanding the difference between them is the difference between picking a heating system that works for your barn and picking one that fights against it.

Conduction
Direct Contact
Heat moves through direct contact. The flame heats the cast iron, the cast iron cooks the eggs — energy passes straight through the metal. Whatever touches a hot surface, gets hot.
Solid → Solid
Convection
Through Air
Heat is carried by moving air. A radiator warms the air touching it, that air rises to the ceiling, cooler air takes its place — the cycle repeats. Without that air movement, the heat just sits there.
Solid → Air → Object
Radiation
Through Space
93,000,000 MILES
Energy travels in waves through space. Sunlight is made up of many bands of energy — visible light, ultraviolet, and infrared. Infrared is the band you feel as warmth on your face. It crosses 93 million miles of vacuum to reach you, and it doesn’t need air to deliver heat.
Source → (through space) → Mass
In a Real Barn

Two ways to heat a barn.
Same BTUs in. Very different heat out.

Take the same barn, the same outside temperature, and the same total BTU output. Run it through a hot water system and run it through Reflect-O-Ray. The energy delivered to the floor — where the birds actually live — is dramatically different.

Hot Water Pipe
Convection
CIRCULATING FANS WARM AIR TRAPPED ABOVE COOLER GAPS
The pipe heats the air touching it. That warm air rises straight to the ceiling, where it stays. Producers add circulating fans to push it back down — but the fans only deliver heat where the air is being moved. The wall corners stay cooler, and the chicks pile in to escape the drafts moving across the floor. None of it works without keeping the air in motion.
Heat delivered: only where the air is forced to go.
Reflect-O-Ray Tube
Radiation
INFRARED PASSES THROUGH AIR EVERY SURFACE WARMS
The tube emits infrared waves that pass through the air without heating it. They travel until they hit something solid — the floor, the bedding, the animals, the feeders, the walls. All of that mass absorbs the energy and warms up. Then the warm surfaces warm the air from below, the natural way heat wants to move.
Heat delivered: directly to where the animals live.
A high-output system that can’t get its heat downward is a high-output system with a delivery problem. And in a barn, delivery is everything.
The Brooding Stage Problem

The first 48 hours decide everything.
And it’s the one job hot water cannot do.

Day-old chicks have very little thermal mass. Their bodies cannot tolerate moving air. They need a warm floor from the moment they’re placed — not a warm air column, not a heated thermostat reading, but actual warm surfaces underneath them. Hot water heating depends on moving air. Reflect-O-Ray doesn’t.

Hot Water · Fans Off
90°F TARGET
90°F+ WARM AIR TRAPPED 65°F COLD FLOOR
Heat trapped at the ceiling. Chicks left cold.
Reflect-O-Ray · Fans Off
90°F DELIVERED
90°F EVERY SURFACE WARMS
Heat lands on the floor. Chicks comfortable.
From the field

Many Reflect-O-Ray producers run no minimum ventilation for the first 7–10 days, because the system isn’t generating combustion byproducts inside the barn and the dry, warm floor controls humidity naturally. Producers running hot water systems next door are usually pulling air long before that — not because the chicks are ready, but because the heating system can’t manage moisture on its own.

Side By Side

What the same BTU has to do, in each system.
The complete picture, end to end.

The same unit of energy ends up in very different places depending on what equipment you bought. Here’s how those BTUs spend their day.

Hot Water (Hydronic) Reflect-O-Ray (Infrared)
Heats first The water in the pipes The tube surface (instantly red-hot)
Heat travels by Water → air → object Infrared waves through the air
Where heat lands first The ceiling The floor, walls, animals, and equipment
Air movement required? Yes — circulating fans must run constantly No — works in still air
Bird-level temperature Cooler than the thermostat reads Matches the thermostat — or warmer
Brooding stage Fights itself: chicks need still air, system needs moving air Floor warm from minute one. No conflict.
Drafts at floor level Always present from circulating fans None
Chick distribution Piled in corners, escaping drafts Spread evenly across the floor
The Bottom Line
Convection heats air. Radiant heats barns.

Same BTUs. Same fuel. Completely different outcomes — because where the energy lands and what it warms first decide everything that happens after.

What actually changes in the barn
↻

Heat held in the mass

The floor and structure become the heat reservoir. Outdoor swings stop pushing the barn around.

⊥

Drier litter from day one

A warm floor evaporates moisture before it builds. Less caking, less ammonia, less topdressing.

◷

Faster cleanout & dry-down

The barn dries from the floor up between flocks. Turnaround time shrinks meaningfully.

∿

Lower runtime

No fuel spent heating air the chicks never feel. The system fires less because the mass is already warm.

Ready to see what this looks like
in your barn?

Free layout consultations across Western Canada and Montana. We’ll walk through your barn dimensions, current setup, and what a Reflect-O-Ray installation would look like for your operation — no pressure, no charge.

📞 (587) 747-3753 See Poultry Page →
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