Winter Packing Shed Setup: Heaters, Gloves and Freeze Protection

An unheated packing shed needs three kinds of cold-weather gear: something to keep people warm enough to work, something to keep wet equipment from freezing, and a heater placed where it cannot start a fire or meet a wet floor. Most of the money should go to gloves, layers, mats and a warm place for breaks. A heater is the part to treat with care, because sheds are full of cardboard, bags and dry plant debris that burn.

Fire risk from heaters is real, and this guide does not tell you what your heater can do or where your wiring can go. That belongs to the maker's manual, local code and a licensed electrician. What follows covers how to think about the gear and what to check before you buy.

Start with the cold you are actually dealing with

Cold in a packing shed shows up in different ways. Hands go numb and slow, which affects cutting and sorting. Feet get cold from the floor. Wet items freeze: hoses, sprayers, tubs and anything holding water. Plug-in equipment and batteries may not like the cold either. Treat each one separately, and you will often find that a heater is not the first thing to buy.

Gloves, layers and warm breaks

The CDC's NIOSH cold-stress guidance recommends several layers of loose clothing, waterproof insulated boots, spare gloves and socks, and avoiding bare-skin contact with cold metal. It also advises employers to provide warm break areas and to schedule cold work for the warmer parts of the day. Those points translate directly into gear.

• Two glove systems. Pair a warm glove for standing and carrying with a thinner glove for fine work, and keep a dry spare. For cutting tasks, cut-resistant gloves can go over or under a liner if they fit; the cut-resistant glove guide covers sizing and fit.
• Waterproof gloves for wash work. Wet hands in cold air are the fastest way to lose feeling. Waterproof gloves with a warm lining help, but check that they leave enough grip for a wet tote.
• A mat under the packing bench. Concrete pulls heat from the feet. A mat gives some separation, and the anti-fatigue mat guide explains edge types and cleaning.
• A real break spot. A small warm room, a vehicle or a house is better than a cold corner of the shed. A kettle or insulated flask of warm drink helps, and so does a rack for wet gloves to dry.

Heaters: where they belong and where they do not

Choose a portable heater that has been evaluated by a nationally recognized testing laboratory, and follow its manual. Ready.gov's home-fire guidance adds three useful rules that apply to any shed: keep combustible objects at least three feet from portable heating devices, look for a heater that switches off automatically if it falls over, and avoid overloading outlets and extension cords.

A packing shed breaks those rules easily. Cardboard boxes, paper bags, wood crates, liners and dry plant material are all combustible, and they tend to pile up near a bench. Walk the room and imagine the heater in a spot, then look three feet in every direction. If you cannot clear that space, the spot is wrong.

Near wet floors and wash tubs

Packing sheds are wet places. Water, a hose and an electric heater do not mix well, so keep heaters off wet floors, out of splash range and away from standing water, and follow the manual's warnings on moisture. Whether an outlet in a wet area needs shock protection is a question for a licensed electrician and your local code. Do not rely on a long extension cord run across a wet floor.

Fuel-burning heaters

Fuel-burning heaters bring combustion gases and fuel handling into the room. Whether one can be used in a shed, and what ventilation it needs, is set by its manual and by local code. Do not assume that an open door is enough, and do not use one in an enclosed space unless the maker says it is allowed. If you are not sure, choose gear that does not burn fuel, or ask a qualified technician.

Freeze protection for water and equipment

Freezing damage is predictable and avoidable. Make a list of everything in the shed that holds water or sits in it.

• Hoses, sprayers and wash tubs: drain them before a hard freeze, coil hoses on a hook and store spray nozzles indoors.
• Test strips, sanitizer and cleaning products: check the label for storage temperature and do not leave them in a freezing shed.
• Batteries, scales and loggers: check the manual for the operating and storage range. Some units misread or drain faster when cold, so keep them in a warmer spot between uses.
• Ice packs and liquid-filled items: keep them where freezing will not split a seam.

A temperature-and-humidity logger lets you see how cold the shed actually gets overnight, and the data logger guide covers what to look for. If stored crops share the space, their temperature needs differ by crop, so check your extension service for the crop in question.

Airflow, moisture and a cold shed

Closing a shed tight and heating it can raise humidity, and wet air on cold surfaces turns into condensation. Plan for some airflow and keep moisture-sensitive packaging off the floor. A small circulation fan can keep air moving without making the room colder; see the circulation fan guide. Before you stop for the season, run through the steps in how to clean, oil and store harvest tools so gear that is not in use stays dry.

Frequently asked questions

Sources and verification