# Space Heaters Electric heaters are simple appliances whose real questions are safety and running cost. These guides cover sizing, placement, safety clearances and how to estimate electricity use. _Last updated: 2026-09-28_ ## What you will find here - Sizing a heater to a room - Safety clearances and what not to do - Estimating running cost from watts - Heater types: ceramic, oil-filled and fan-forced ## Frequently asked questions **Q: How much does a 1500 W heater cost to run?** A: At 1500 W, the unit uses 1.5 kWh per hour. Multiply by your electricity price per kWh: at $0.15/kWh that is about $0.225 per hour. **Q: How much space around a space heater is safe?** A: Keep at least 3 feet (about 1 meter) of clear space around the unit and away from bedding, curtains and furniture, and never use an extension cord rated below the heater's current. ## Products in this category - [DREO 1500W 16-Inch Space Heater](https://www.amazon.com/dp/B0B1JCB1X2?maas=maas_adg_api_585602613512925350_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBd80bd4ce4ece40f44bcc76fcc0c48425&aa_adgroupid=5749xutSKG0_bDN2b5VkYZhr0O73dXxQKrjeAg3U7zdhblyjJ5X0RCMduXEZKvDoJkEBxJ7HINzBFMJAew2UL&aa_creativeid=c788MhgbSHlJ6REMvxwdfgAdAuA2AsrYNZnpsd9YFV4aJm8_c) — Best for: Small to medium rooms needing fast heat. Amazon rating 4.5/5 (15376 reviews). ASIN B0B1JCB1X2. - [DREO Smart Wall-Mounted Heater](https://www.amazon.com/dp/B0D7ZWYHGZ?maas=maas_adg_api_585602613512925350_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBd80bd4ce4ece40f44bcc76fcc0c48425&aa_adgroupid=b298OVDozH1cGmj5BI_b2rjpRbTlZc9wQk_bRp49GXM9EdRJ_bW0lmj9KQ5kwBdvWaWOy_bMA3sBQ0XYMiMa3AoA&aa_creativeid=056dBXKAfKxX3XoLN1BkmkJaiDM6IENl5NCWu9DLaKw1sFw_c) — Best for: Small rooms where wall space is available. Amazon rating 4.5/5 (3159 reviews). ASIN B0D7ZWYHGZ. _Specifications and ratings are manufacturer/retailer figures, not SmartAirGuide measurements. Some links are affiliate links._ --- Canonical: