SKU: RH0033

Roy-L-Heat Calf Warmer Parts 7-1/4" Ventilator

Name: Roy-L-Heat Calf Warmer Parts 7-1/4" Ventilator
Brand: Smucker Manufacturing
SKU: RH0033
Price: 19.00 USD
Availability: InStock

$19.00

Shipping calculated at checkout.

Roy-L-Heat calf warmer part RH0033

Cleaning and Care

Between calves. The heater enclosure and the floor grate both come out. Rinse and disinfect the box. Do not put a fresh newborn into a box you used for a scouring calf without cleaning it first.

The heater. Compressed air only. Never immerse it in water and never spray it down. It is the one part of this that is not washable.

Before the season. Plug it in and run it a month before you expect the first calf. Finding a dead heater in a warm barn in January beats finding one at 2 a.m. at 20 below.

If it shuts itself off. That is the inlet air overheat protection doing its job. Turn it off, unplug it, clear whatever is blocking the inlet, wait five to ten minutes, restart.

Description

Roy-L-Heat replacement ventilator in 7-1/4" in diameter for the heated calf warmer.

A Wet Calf on a Cold Night Has About an Hour

A newborn that comes out in a snowbank loses heat faster than it can make it. Get it dry and warm inside the first hour and it usually gets up and sucks. Miss that window and you are treating pneumonia for a month, if you keep it at all. The Roy-L-Heat does one job: dry and warm, fast, without cooking the calf.

Step 1

Preheat it

Five to ten minutes before the calf goes in. A cold box takes heat out of the calf before it puts any back.

Step 2

Calf in, head out

The calf lies on a slotted floor grate above the wet. The flexible rubber head boot lets it put its head through into fresh air, or keep it inside in the warm, its choice.

Step 3

Warm air moves, moisture leaves

A 110 volt heater and fan push warm air under the grate, up the sides and back through. The attic vent carries the moisture out instead of leaving the calf in a steam box.

Step 4

Out when it is dry

Usually 30 minutes to 2 hours depending on how far gone the calf is. Watch it, do not walk away and forget it.

~100°FTarget inside temperature, thermostat controlled

110VGrounded outlet, 20 amp circuit recommended

38 x 29 x 38″Room to lie down and to stand up

2 yearsManufacturer warranty, made in the USA

Roy-L-Heat RH5000 Specifications

Model	RH5000
Dimensions	38 in long x 29 in wide x 38 in high
Power	110 to 120 volt, grounded outlet. A 20 amp circuit is recommended.
Extension cord	12 gauge up to 50 feet. 10 gauge past that.
Heat	Heater with circulating fan and adjustable thermostat, High and Low. Air keeps moving even when the thermostat is satisfied, which is what dries the calf.
Safety	Inlet air overheat protection shuts the heater down if airflow is blocked. Rubber flap deflector between the calf and the heater airflow.
Ventilation	Attic vent for moisture. Flexible rubber head boot for fresh air.
Floor	Slotted grate that keeps the calf up out of urine and manure.
Cleaning	Heater enclosure and floor grate both come out. Rinse and disinfect the box. Clean the heater with compressed air only, never water.
Construction	High density polyethylene

Why the Roy-L-Heat

Dry and Warm in the Hour That Matters

A newborn that comes out in the cold loses heat faster than it can make it. Get it dry and warm inside the first hour and it usually gets up and sucks. Miss that and you are treating pneumonia for a month.
Airflow Is What Dries a Calf

Warm air moves under the slotted grate, up the sides and back through, and the fan keeps running even when the thermostat is satisfied. Heat alone leaves a wet calf in a steam box. Moving air takes the water away.
Thermostat Controlled, Not Just On

Held at about 100 degrees with High and Low settings, plus inlet air overheat protection that shuts the heater off if airflow gets blocked.
The Calf Picks Its Own Air

A flexible rubber head boot lets it push its head out into fresh air or keep it inside in the warm. An attic vent carries moisture out the top.
Built to Be Cleaned

The heater enclosure and the floor grate both come out, so you can rinse and disinfect between calves instead of promising yourself you will later.

Calving Season Tips

Test it a month before you need it

Plug it in and let it run. A heater that died sitting in the shed all summer is something you want to find out about in a warm barn, not at 2 a.m. in a blizzard.
Put it where you will actually use it

In the calving barn, on its own 20 amp circuit, near where you bring calves in. A warmer at the far end of the shop does not get used at 3 a.m.
Preheat before the calf goes in

Five to ten minutes. It matters more than people think.
Size the extension cord

12 gauge to 50 feet, 10 gauge past that. Low voltage means low heat and you will blame the box.
Get the calf colostrum too

The warmer handles temperature. It does not handle nutrition or immunity. Warm the calf, then get colostrum into it.
Keep a spare heater on the shelf

The heater is the part that fails, and it always fails in calving season. A spare RH9210 on the shelf is the difference between a bad night and a lost calf.

Heater Troubleshooting

If the MediHeat heater shuts off and will not come back on, it is almost always one of two parts. You can tell which one in under a minute.

Find Out Which Part Failed

After the heater shuts off, turn the bottom knob to the blue fan setting and watch what happens.

The fan runs but there is no heat. The thermostat is the problem. Replacement thermostat is part RH0051.

The fan will not run at all. The high limit switch has tripped. Unplug the heater and leave it unplugged so the switch can reset.

Why It Trips

A high limit switch trips because the heater housing is running hotter than it should, and that comes down to airflow. Smucker enlarged the intake vent on the back of the housing on later models for exactly this reason.

If yours is an older housing, the RH0063 air vent is the part that addresses it. Smucker publishes the full remedy on their own troubleshooting page, and we would rather point you there than have you guess at it.

Still stuck after that? Send us the symptom through our contact form and we will work it out with you.

Before you order a part, run the fan test above. The thermostat and the high limit switch look like the same failure from the outside, and the test is the only thing that tells them apart.

Roy-L-Heat Instruction Manual

Assembly, operation and care for the RH5000 calf warmer.

Open the Manual
Replacement Parts

Heaters, thermostats, grates, head boots, hinges and vents, all in stock.

Shop Calf Warmer Parts
All Instruction Manuals

Every manual we carry, sorted by brand.

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Roy-L-Heat Questions

Using It

How long does a calf stay in it?

Usually 30 minutes to 2 hours. It depends how cold and how wet the calf was when it went in. Check on it rather than setting a timer and walking off.

How warm does it get inside?

Around 100 degrees, controlled by the thermostat. The heater runs on High and the thermostat holds the box temperature. The fan keeps moving air even when the thermostat is satisfied, and that constant airflow is what actually dries the calf.

Do I need to preheat it?

Yes, five to ten minutes. Putting a cold wet calf into a cold box takes heat out of it before it puts any back.

Can the calf breathe alright in there?

Yes. The flexible rubber head boot on the front lets the calf put its head out into fresh air or keep it inside in the warm. It picks. There is also an attic vent up top that carries moisture out so it is not sitting in a steam box.

Will it burn the calf?

No. The calf lies on a slotted floor grate with warm air moving underneath, and there is a rubber flap deflector between the calf and the heater airflow so nothing is blowing directly on it. The thermostat holds the box at about 100 degrees.

What if something blocks the airflow?

There is inlet air overheat protection that shuts the heater off automatically. To reset it, turn it off, unplug it, check the inlet for whatever is blocking it, wait five to ten minutes, then restart.

Can I use it for anything besides calves?

People use them for lambs, kids, foals and small livestock. Anything that fits and needs drying out.

Power and Setup

What does it plug into?

A grounded 110 to 120 volt outlet. A 20 amp circuit is recommended, and it wants that circuit to itself rather than sharing with a load of other barn equipment.

Can I run it on an extension cord?

Yes, but size it. 12 gauge up to 50 feet, 10 gauge beyond that. An undersized cord drops voltage, and a heater on low voltage is a heater that does not heat.

How much assembly is there?

About ten minutes.

Cleaning and Upkeep

How do I clean it between calves?

The heater enclosure and the floor grate both come out. Rinse and disinfect the box. That is the whole point of the removable enclosure, so you can actually clean it in calving season instead of promising yourself you will later.

How do I clean the heater?

Compressed air only. Never immerse it in water and never spray it down. It is the one part of this that is not washable.

What should I do before calving season starts?

Plug it in and run it a month before you expect the first calf. If the heater has failed sitting in a shed all summer, you want to find that out in a warm barn in January, not at 2 a.m. at 20 below.

What parts wear out?

The heater is the main one. The MediHeat heater, part RH9210, fits units built 2020 and newer, and there is a retrofit version, RH9210-RF, for older boxes. Beyond that it is the usual: thermostat, head boot, hinge assembly, floor grate, vents and switches. We stock all of them.

Buying and Shipping

Does it ship free?

Yes. The RH5000 ships free.

Is it worth it?

That is your math, not ours. The common way ranchers put it is that it pays for itself the first calf it saves. A replacement heifer calf is worth a good deal more than the box.

Who makes it?

Smucker Manufacturing, in the USA, with a two year manufacturer warranty. Keep your receipt and work a warranty claim through us.

Do you stock replacement parts?

Yes, and that is half the reason to buy it here. Heaters, thermostats, head boots, hinges, grates, vents, switches and the small pieces. A calf warmer you cannot get a part for in February is a large plastic box.