- 35,000 Btu forced-air propane heater.
- Ideal for smaller industrial/commercial workspaces; heats up to 800 square feet.
- Runs up to 12 hours.
- Requires 20-pound propane tank (not included); 10-foot hose and regulator included.
- Adequate combustion and ventilation air must be provided; 1-year limited warranty.
The MH125FAV is the least powerful of Mr. Heater's line of
propane forced-air heaters for smaller jobs (see the MH55FAV and
the MH85FAV). The heater gives you 35,000 Btu--enough to heat 800
square feet. Though the larger models give you more Btus, each
heater in the line shares the same basic features, including an
automatic shutoff with loss of flame or power supply and a
high-output fan that circulates heat quickly. Hooking the heater
up to the 20-pound propane cylinder (not included) is easy, and
the 10-foot hose and regulator are included. CSA certified.
One-year limited warranty.--Josh Dettweiler
What's in the Box
Heater (heater body kit, control box assembly, valve with
thermocouple, wire assembly, electrode, high limit switch [240
degrees F], thermocouple, motor 0.74 A, grille assembly, fan
blade, 6.75 x .75 pitch, power, cord assembly, strain
bushing, piezo ignitor, clip handle, handle), 10-foot hose,
regulator, operating instructions and owner's manual
Five Tips for Buying a Heater
Choosing a space heater is a matter of sifting through a
bewildering array of types, power ratings, and fuel sources.
Let's break it down a little to make the process easier.
What are the different types of space heaters?
* Radiant heaters emit infrared radiation that directly warms the
objects in front of the heaters (rather than the surrounding
air). If you only need heat by a desk or in a small section of a
room, a radiant heater is quiet and will use very little power.
* Forced-air heaters use a fan to blow air that has been warmed
by metal or ceramic heating elements. A forced-air heater is
appropriate for quickly heating up a small- to medium-sized room,
but can be noisy.
* Convection heaters draw cold air from the floor; the air is
warmed by heating coils and emitted from the top of the heater. A
convection heater is appropriate for quickly heating up a small-
to medium-sized room, but also can be noisy.
* Radiators work by heating oil enclosed in a reservoir,
gradually heating the surrounding air. If heating speed isn't an
issue, you might want to opt for a radiator. These are extremely
quiet and effective--perfect for bedrooms.
Should I buy an electric or a combustion model?
If you want a heater that will be available in emergencies, or
that can heat areas larger than a single room, choose a
"combustion" model--one that is powered by a or fuel like
propane, kerosene, natural , or diesel. Which fuel type you
choose depends largely on convenience and local availability. For
example, diesel would be appropriate for a heater you take with
you on long car trips.
How powerful a heater do I need?
Heaters are rated by BTU, which stands for British Thermal Unit
(the a of heat needed to heat one pound of water by 1 degree
F). To find out how many BTU you need:
* Calculate the volume of the space to be heated by multiplying
square footage by height.
* Multiply that number by 4 if your insulation is poor, 3 if it's
average, or 2 if it's good.
The resulting number is a ballpark figure for how many BTU you'll
need.Do space heaters cost a lot to operate?
As a general rule, electric space heaters are more expensive to
use than combustion models. To ensure energy efficiency, a
thermostat is a must-have feature for any heater. For radiant
heaters, models with a 360 degree heating surface can heat larger
spaces. If you need a forced-air heater, models with ceramic
elements tend to be more efficient.
Are space heaters a fire hazard?
Space heaters are implicated in about 25,000 residential fires
every year. To ensure proper safety, always follow the
manufacturer's usage instructions and fill out the warranty card
to receive informational updates from the manufacturer. Also,
look for extra safety features such as an automatic shutoff
switch that can shut down the unit if, for example, it gets
upended. In addition, choose a model where the heating element is
adequately enclosed within the unit.