Garage Heater Buying Guide for California: Electric, Infrared or Mini Split
In most of California a garage needs heat for a few cold months and cooling for many hot ones, which is why a mini split heat pump is usually the best long-term buy for a garage gym, office or workshop. For heat only, a 240 volt hardwired electric heater sized at roughly 10 watts per square foot of an insulated garage is simple and quiet. Insulate the garage door and replace the bottom seal first, or the heater just warms the driveway. Propane heaters need fresh air and a CO alarm, and none belong in a closed garage with a car running.
Why listen to us: Zomg The Handyman crews have done more than 10,000 jobs across all of California since 2009, and every winter the calls change: lights on rooflines in November, cold rooms and dead water heaters in December and January, then leaks, clogged gutters and drafty doors once the storms arrive. This guide is what our installers tell customers before they buy, so the thing you order is the thing that fits your house. Garage gyms and home offices have changed what people ask us for; the garage used to be storage and now it needs to be comfortable.
Quick Comparison
| Pick | Best For | Price Tier |
|---|---|---|
| Best Year-Round | MRCOOL DIY Mini Split Heat Pump (12,000 BTU) | Premium tier |
| Best Heat-Only Electric | 240V Hardwired Garage Heater with Thermostat (5,000 to 7,500 W) | Mid tier |
| Best Spot Heat | Infrared Garage Heater (ceiling mount) | Mid tier |
| First Thing to Buy | Garage Door Insulation Kit | Value tier |
| Second Thing to Buy | Garage Door Bottom Seal (T-style or bulb, measured to your retainer) | Hardware |
Our Picks
Pick by How You Use the Garage
| Use | Best option | Why |
|---|---|---|
| Gym or office, used most days | Mini split heat pump | Heats and cools; far cheaper to run per unit of heat |
| Workshop, winter weekends | 240V electric or infrared | Lower up front cost, fast heat |
| Occasional, an hour at a time | Plug-in heater at a bench | Nothing to install; see our space heater guide |
Seal It Before You Heat It
Most California garages are uninsulated: stucco walls, an open rafter ceiling and a thin metal door with a cracked bottom seal. Put a heater in there and it runs all day. In order of payoff: the garage door bottom seal and side weatherstrip, a door insulation kit, then insulation in the ceiling if there is living space or attic above. Our weatherstripping guide covers the seal types.
The Electrical Part (Read Before You Buy)
- 240 volt heaters and mini splits need their own circuit from the panel, with the right breaker and wire size from the install manual. Look at your panel for two open spaces before you buy.
- Plug-in heaters should not share a garage circuit with a freezer, compressor or the door opener.
- Propane and kerosene heaters burn fuel in the room. Use only ones made for indoor use, open a window or door for fresh air, keep them away from gasoline and paint, and install a CO alarm.
Buy It, Then Let Zomg Install It
Our crews install what you buy, from Amazon, Costco, Home Depot or Lowe's, anywhere in California. What it costs on our booking page:
- Mini split heat pump installation (MRCOOL and Pioneer, line set routing, electrical, mounting): from $1,345.50.
- A 240 volt outlet where the panel already has capacity: from $243. A new circuit from the panel is quoted after photos of your panel.
- Garage door repair, including seals: $234. Weather stripping: $117.
- Insulation and weatherizing: from $148.50; attic batts from $301.50 per 500 square feet.
Prices are from our booking page in November 2026 and are what you pay for the work; the booking page always shows the current price and every option before you confirm.
More: MRCOOL installation, best mini split for a garage, garage door insulation kits, garage door weather seals.
Need help with this in California?
Zomg The Handyman installs what you buy, across all of California. Upfront prices, 4.9 rated on Google, same-day slots available.
Book Mini Split Installation →Frequently Asked Questions
What size heater do I need for a two-car garage?
For an insulated two-car garage of about 400 to 500 square feet, roughly 4,000 to 5,000 watts of electric heat or a 12,000 BTU mini split. An uninsulated garage needs more, or insulation first.
Is a mini split worth it for a garage in California?
Usually yes if you use the garage most days, because the same unit cools it through summer and makes about three times more heat per kWh than a resistance heater.
Can I use a propane heater in my garage?
Only a heater rated for indoor use, with fresh air, a CO alarm, and well away from gasoline, paint and solvents. Never with a car running.
Do garage door insulation kits work?
They make a noticeable difference on a single-layer metal door, in winter and especially in summer sun. Seal the bottom and sides at the same time.
How much does Zomg charge to install a mini split?
From $1,345.50 on our booking page; the final price depends on the number of indoor units.
Our service areas: MrCool Installation in Los Angeles · MrCool Installation in San Diego · MrCool Installation in Irvine
Seal and Finish the Garage
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