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Protect from wind and rain with this Bent Air Port without decreasing the performance of the ventilation wall fan. Increase safety when the Pressure Wall Fans are located lower down on the wall by attaching this Net Fan Cover. The wall convector may be a fully self-contained iindependent unit or it may be connected to a building central cooling (water, refrigerant) or heating (water, steam, electricity) source.
Here we describe types of cooling and heating wall convectors and common troubleshooting steps.
Above is an enclosure for a Command Aire wall convector heating or cooling convector unit, ca 1980. If the convector fan motors run and the squirrel cage fans spin but not enough air is coming out of your convector unit, turn off power and take a closer look at the fan blades themselves - you may need a flashlight and a mirror to make this check without disassembling the unit further than shown here (we removed the convector unit cover). Also check the cooling or heating coil fins for blockage by dust and debris - a more common source of air flow blockage at heating and cooling convector units like the one shown. Our photo (above left) illustrates a condensate handling problem in the cooling convector unit for the same apartment unit introduced above.
Air conditioning condensate was leaking inside of the convector unit due to a clogged condensate drain line.
The condensate leak exited the bottom of the convector, ran through a raised floor cavity, entered apartment building walls, and ran around the wall interiors in a metal stud-framed wall sill plate where it led to major toxic mold contamination over a wide area, floor damage, and the need for costly cleanup and repair work. Sketch of a wall convector (above left) courtesy of Carson Dunlop and our photo (above right) show a traditional wall-mounted heating convector unit. The heat source in a wall-convector may be forced hot water, gravity hot water, steam, or the unit may be heated by electricity. Electric-heated wall convectors and some other convector units may incorporate a blower fan to increase the heat output from the device. Conventional wall-mounted heating convectors (units that do not include a fan or blower) rely on natural movement of warm-air upwards to draw cooler air in from the floor level. You'll notice that there is a very generous air intake space along the bottom of the convector - it is designed to move plenty of air across its heating coil. As the convector gets hot, cool air is drawn up from floor level, is heated by the fins on the convector, and warm air is supplied out of the convector's front grille. Below we provide articles that help in diagnosing and repairing no-heat problems with each of these types of heat delivery systems. Our photo (left) illustrates a steam-heated wall convector unit in a 1960's home found in New York. While wall convetors are widely used for cominatin heating and cooling systems, their energy sources vary and include chilled water as well as refrigerant for cooling, while the heat source in a wall-convector may be forced hot water, gravity hot water, steam, or the unit may be heated by electricity. Many small wall convectors and some other convector units may incorporate a blower fan to increase the heat output from the device.

Once every year or so, we like to take the covers off of heating convectors to inspect the unit for leaks. While we're at it, we make certain that the heat exchanging fins on the heating convector are not dust-clogged (photo at left). Getting good air flow through the heat exchanging fins of all finned heat exchanging devices such as heating convectors or finned copper tubing heating baseboards can make a significant difference in liberating the heat output from the device. Just gently vacuum off the convector using a brush attachment and your vacuum cleaner - take care not to bend the fins. A heating service contractor can provide more aggressive cleaning using special products, but on residential heating equipment that has not been exposed to some unusual problem we usually don't find it necessary. Continue reading at FAN CONVECTOR HEATERS - HYDRONIC COILS where we include heating output capacity tables, operating temperatures, flow rates, or select a topic from the More Reading links or topic ARTICLE INDEX shown below.
Try the search box below or CONTACT US by email if you cannot find the answer you need at InspectApedia. After completing the programs below, new technicians generally need between 6 months to 2 years of field experience before they are considered proficient. HVAC Excellence is a not for profit organization that has been serving the HVACR industry since 1994. NCCER is a not-for-profit education foundation created to develop industry-driven standardized craft training programs with portable credentials and help address the critical workforce shortage facing the construction industry. In addition, all technicians who purchase or work with refrigerants must be certified in their proper handling. NOTE: when considering an HVAC training course or school, check the HVAC education accrediting associations listed above. NATE is supported by ASHRAE, the US EPA, and a host of other trade and professional associations. Features covered in depth include: descriptions of typical styles, characteristics and requirements, testing, listing, reporting, certifying, packaging and product marking.
Guidelines for proper installation are treated and illustrated in depth, featuring connections, splices and proper support methods for flexible duct. Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. The Illustrated Home illustrates construction details and building components, a reference for owners & inspectors.
An interesting detail is the stone wall supporting the main donjon, built in a technique called ogi kobai - “fan sloping". The curving of the wall has the role to improve the wall’s resistance but also to improve its defense capability by making it harder to climb. Muza-chan are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

A wall convector is a wall-mounted unit that provides cool air or warm air to the building interior. You won't know just what's installed inside that cover without a bit of further investigation. A heating convector unit operates much like a radiator (page top photo) but instead of thick cast iron used to radiate heat, the convector is made of copper tubing covered with metal fins, or of cast iron with cast-in fins. While recessed heating convectors were popular for aesthetic reasons (no radiator projects into the room), often a high percentage of the heat is flowing through the exterior wall to outside. Our photographs of a wall-mounted heating convector (above) show a wall unit that is heated by steam. We explain how to inspect & repair central air conditioning systems and for homeowners we also answer basic HVAC questions such as what are the basic air conditioning components? Department of Labor website describes HVAC jobs and the employment outlook for HVAC technicians.
It is our goal to improve competency through validation of the technical education process. This programmatic accreditation program is the only one that is supported by the major industry associations. The text is intended as a reference guide to help building owners operate and maintain their home effectively. Because a large part of the castle was destroyed in 1945, the main donjon (in the photo) was rebuilt in 1959 and the reconstruction of the castle’s former palace still continues and it will be finished in 2018.
This technique is also known as Kiyomasa-style Crescent Stone Wall, after the famous Japanese daimyo Kiyomasa Kato, an excellent architect specialized in castles and fortifications.
By setting standards and verifying that they have been met, we inspire the industry to excel. We know that all of the challenges that face our industry are achievable by continuous improvement in the way that we prepare technicians. Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order. Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The Home Reference Book & illustrations from The Illustrated Home.
Carson Dunlop Associates' provides extensive home inspection education and report writing material.
Special Offer: For a 5% discount on any number of copies of the Home Reference eBook purchased as a single order.

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