Finding the right heater for a cold frame, greenhouse, or sunroom can extend growing seasons and maintain plant health. This article highlights five reliable space heaters designed to deliver steady warmth, safety, and energy efficiency in small to medium spaces. Each option combines multiple heating technologies, safety features, and user-friendly controls to help you choose with confidence.
| Product | Brand | Key Benefit | Energy Type |
|---|---|---|---|
| Dr Infrared Heater Portable Space Heater, Original, 1500-Watt | DR. INFRARED HEATER | Large-room heating with dual infrared + PTC for faster warmth | Infrared + PTC |
| Heat Storm HS-1500-PHX-WIFI Infrared Heater | Heat Storm | Wi-Fi control, wall-mounted to save floor space | Infrared |
| BEYOND HEAT Milkhouse Space Heater | BEYOND HEAT | Three heat settings with safety protections | Electric convection |
| Heat Storm Wall Gray HS-1000-WX Deluxe | Heat Storm | Infrared heat with safe-to-touch grill and remote | Infrared |
| EZ-HEAT 1,500 Watt Baseboard Space Heater | EZ-HEAT | Convection heating with thermostat and safety features | Convection |
Dr Infrared Heater Portable Space Heater
This model combines infrared quartz tubes with a PTC element, delivering up to an estimated 5200 BTU for noticeable warmth in larger spaces. It features auto energy-saving modes, high/low settings, a 12-hour timer, and a quiet blower at 39 dB. Safety features include tip-over and overheat protection, plus an IR remote for convenient control from across the room. The dual heating system enables rapid warmth while maintaining steady-temperature performance in well-insulated cold frames or sunrooms.
Heat Storm HS-1500-PHX-WIFI Infrared Heater
This wall-mounted infrared heater provides space-saving warmth with Wi-Fi connectivity for remote control via a phone. It includes a touch screen thermostat and a remote, plus tip-over safety shut-off. Designed to fit bathrooms, bedrooms, kitchens, and offices, it is ideal for areas where floor space is limited but consistent heat is needed. The unit delivers radiant warmth that helps maintain plant-friendly temperatures in protected frames without cluttering the floor.
BEYOND HEAT Milkhouse Space Heater
The Milkhouse heater offers three adjustable heat settings—1300W and 1500W, plus a fan-only mode. It includes safety features like a tip-over switch and automatic overheat protection. The unit emphasizes durability with a robust exterior and ETL certification for safety. Its steady heating profile is suitable for small to medium framed spaces, helping maintain plant-friendly warmth during cold spells while remaining quiet and reliable.
Heat Storm Wall Gray HS-1000-WX Deluxe
This 1000-watt infrared heater is designed to warm objects and people efficiently, rather than just heating air. It features a safe-touch grill, auto shut-off on tip-over, and a wall-mount design to maximize floor space. Its modern profile makes it suitable for small offices, bathrooms, or greenhouses without compromising aesthetics or comfort, enabling quick warmth to protected zones within a cold frame setup.
EZ-HEAT 1,500 Watt Baseboard Heater
This baseboard heater uses convection to deliver steady warmth along baseboard lines, ideal for greenhouse rows or a cold frame setup aligned with walls. It includes two heat settings, an adjustable thermostat, a tip-over switch, and a stay-cool body with overheat protection. Its design prioritizes quiet operation and safe handling in spaces where wall installation is feasible and desired.
Buying Guide
Key considerations when choosing a cold frame heater:
- Space size and layout: Wall-mounted heaters save floor space in tight greenhouses, while baseboard or freestanding units suit larger frames.
- Heat type: Infrared heaters provide quick radiant warmth for plants and surfaces; convection heaters warm air for overall room temperature. Consider a combination if both rapid and uniform warmth are needed.
- Thermostat controls: Look for precise temperature control (digital or analog), programmable timers, and remote access for consistent daytime and nighttime temperatures.
- Safety features: Tip-over shut-off, overheat protection, stay-cool housings, and cool-to-touch grills reduce risk in moisture-rich environments.
- Noise and airflow: Quieter models with low blower noise help preserve a calm environment for sensitive plants and occupants.
- Installation and aesthetics: Wall-mounted units or slim profiles minimize intrusion into growing spaces; consider whether you need remote control compatibility or smart-home integration.
- Energy efficiency: Look for energy-saving modes, auto shut-off timers, and insulation compatibility to minimize running costs while maintaining even temperatures.
For cold frames and small greenhouses, pairing a radiant infrared heater for rapid surface warming with a secondary convection unit for consistent air temperature can be effective. Prioritize safety features and ensure proper clearance from plants, shelves, and plastic panels to prevent heat damage. Regularly maintain filters and vents to preserve airflow and performance across the heating season.