Building
Cooling
Systems, Inc.

KWIKHEAT Portable Heaters Available for Sale, Rent, Lease, KWIKHEAT Portable Heaters, Indirect Oil Fired and Indirect/Direct Fired Gas LP/NG Models

Applications

Indirect Heaters Concrete Curing Industrial Painting Shipyard Building Pipelines & Hazardous Areas Oil Patch General Construction in enclosed areas Tent Heating Highway and Bridge Construction Pest & Moisture Control Barn Heating Equipment Preheating

Direct Heaters General Construction in non-enclosed areas Areas where lots of heat is required and not concerned about fumes Ventilated Warehouses Large Parking Garages

Indirect Fired Heaters: Heat created by "Convection" - flames heat up the heat exchanger so that the surrounding air is heated as it passes over the chamber, creating hot clean air. Unlike a direct-fired heater, the products of combustion are never in the air stream.

Benefits of Indirect Fired Heating:

1. No Direct Flame - Provides increased safety in dangerous applications (e.g., pipelines, mines, and petrochemical plants).
2. Contains a Heat Exchanger - Allows the fumes and products of combustion to be vented through a flue stack, making the unit suitable for indoor applications and confined areas (e.g., tents, temporary shelters, and hoarding).
3. Clean, Dry Heat - Flue eliminates excess moisture, carbon monoxide, nitrogen) - essential in applications for accelerated drying and curing.
4. Allows for ductwork Attachments - Ductwork can be safely attached to the air outlets, because there is a barrier from an open flame. Ducts enhance the ability to distribute clean heated air to specific target areas, and allow the unit to be place away from the job site.
5. Equipment & Aircraft Preheating - The best type of heater for preheating heavy equipment and airplanes, an indirect flame prevents any possible damage that a direct-fired heater may cause. Ductwork provides heated air to hard to reach places (e.g., engines).
6. Oil-Fired Heater - A non-pressurized tank and contained flame allow the unit to be run on construction sites where pressurized fuel is not allowed for safety reasons, or in a situation where there are combustible fumes and dust.
7. Certification - Indirect fired heaters meet the necessary fired coeds, safety, and environmental standards that other direct-fired units do not.

Benefits of Direct Fired Heating:

1. Less Expensive Heater - The price of an indirect fired heater is two to three times more than a direct fired heater.
2. Lots of Heat - Direct fired heaters are100% efficient. Indirect fired heaters will always have heat loss through the flue.
3. Smaller/Compact Unit - Direct fired heaters do not have to be as large - there is no heat exchanger.

Safety Features for the Indirect Oil Fired Frost Fighter

• High Limit Switch - Shuts down the unit if it reaches a maximum of 250 F.
• Cad Cell/Flame Detector - Shuts down the unit if no flame is detected.
• Oil Primary Control - Locks out burner if cad cell does not detect flame. 30 sec trial for ignition if burner does not light immediately.
• Fan Switch - Extends the durability of the heat exchanger by providing a proper cool down cycle. Will reduce extensive radiant heat off the heat exchanger after shut down.
• Solenoid Valve - Prevents smoky starts and oil from dripping into the heat exchanger after shut down.
• 15 Amp Slow Blow Fuse - Will shut down the unit if insufficient power.

Calculating Heat Requirements

Some of our distributors use the following formula to obtain a rough estimate of the heating requirements for a job site:

Square Footage x Ceiling height x D t x type of building

Where:  D t = Desired Temp. F (inside) - Outside Temp.

Multipliers for type of building structure:

        .135 Sealed Building

        .145 Not Sealed

        .16 Tent

Example: 66,000 Square foot building with a 12 foot ceiling. Outside air is 30 F, and you want to maintain an inside temp of 60 F. The building is not sealed (tarped).

66,000 x 12 x 30 x .145 = 3,445,200 BTU required to heat the entire building at one time.

Of course there are still many other factors (ventilation, insulation, rooms, etc) that will impact on the heat required, but this can be used as a useful starting point.

Common Fuel Consumption Estimates