Festus, MO · Jefferson County
Space & Unit Heater Service for the Spaces Your Main System Doesn't Reach
Exactly what's wrong. Exactly what it costs. In writing.
Some areas need their own heating solution. Garages, workshops, additions, utility spaces, and other hard-to-condition areas can benefit from a properly selected space or unit heater.
Veteran-Owned · Family-Owned · EPA Certified · Fully Insured · Est. 2025
Signs You May Need a Space or Unit Heater
Has your propane system started behaving differently?
Not every space makes sense to heat with your home’s main HVAC system. A dedicated heater may be worth considering when you notice:
- Cold isolated spaces — One room or area stays uncomfortable while the rest of the home is warm.
- Unheated additions — A newer addition lacks enough heating from the existing system.
- Cold garages or workshops — Work areas become difficult to use during colder weather.
- Weak central airflow — Extending ductwork isn’t providing the comfort the space needs.
- Temperature swings — The area gets too cold between normal heating cycles.
- Remodeled spaces — A converted room needs heating without major ductwork changes.
- Heating system limitations — The existing HVAC system cannot comfortably serve the added space.
- Dedicated comfort needed — You want more control over when a specific space is heated.
What Happens During a Space / Unit Heater Visit
The right heater depends on more than the size of the room.
Space Assessment
We look at the area's size, construction, insulation, use, and existing heating conditions.
Heating Requirement
We determine how much heating the space actually needs rather than simply choosing a heater by room size.
Installation Review
Electrical, fuel, ventilation, mounting, clearances, and other installation requirements are reviewed before work begins.
Equipment Selection
We help identify a heater that fits the space, intended use, and available installation conditions.
Professional Installation
The unit is installed with attention to manufacturer requirements, connections, placement, and required clearances.
Startup & Verification
We run the heater, check operation and controls, and verify that the installation is working as intended.
Why Jefferson County Homeowners Choose ExactAir for Space & Unit Heater Service
The Space Comes First
The heater should fit the actual space and how you plan to use it.
Heating Needs Are Considered
We look beyond square footage to understand what the area requires.
Installation Conditions Matter
Available power, fuel, ventilation, placement, and clearances are considered before installation.
Straightforward Recommendations
You'll know what we're recommending and why before work moves forward.
Local, Owner-Led Service
ExactAir is locally owned and operated in Festus, with service focused on Jefferson County and surrounding communities.
Where "Exact" comes from
ExactAir Heating and Cooling was founded in 2025 by Brett Lahue — an Army veteran who learned the trade the old way, checked off job by job under his father, a by-the-book technician himself.
When a job was done right, the answer was always the same word: “Exactly.” The name, and the standard behind it, stuck.
Today ExactAir is a small, owner-operated company serving Festus and Jefferson County — background-checked, EPA certified for both Universal and A2L refrigerants, and insured through Federated Insurance.
— Brett Lahue, Owner & Lead Technician
Space & Unit Heater Service in Festus & Jefferson County, MO
ExactAir serves homeowners and property owners throughout Jefferson County and the surrounding St. Louis Metro area, generally within about 45 minutes of Festus.
Note: A trip fee applies past the standard service radius. Service inside St. Louis city and St. Louis County is currently limited, pending additional licensing there.
What Customers Say About ExactAir's Heating Service
Frequently Asked Questions
Space / Unit Heater FAQs
What is a unit heater?
A unit heater is a dedicated heating appliance designed to heat a specific space rather than an entire home through a central HVAC system.
Where are space or unit heaters commonly used?
They can be useful in garages, workshops, additions, utility areas, and other spaces that are difficult to heat with the home’s primary system.
Can a unit heater heat my garage?
Potentially. The appropriate solution depends on the garage’s size, insulation, intended use, available utilities, and installation requirements.
Can you install a heater in an addition?
Yes, when the space and installation conditions support a dedicated heating solution. ExactAir can evaluate the area before recommending an approach.
Does a space heater need maintenance?
The maintenance requirements depend on the type of heater. Keeping the equipment clean and having its operation checked can help identify developing problems.
How do I know what size unit heater I need?
Size should be based on the space’s heating requirements and conditions, not simply by choosing the largest available unit. ExactAir can evaluate the space before selecting equipment.
Give the cold space its own heating solution
If your garage, workshop, addition, or other space never gets comfortable, let ExactAir evaluate the space and show you what heating options make sense.
