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  1. General HVAC Discussion
    Every furnace has a space for an air filter. The air feeding into your system runs through the filter which catches dirt, dust and allergens. Replacing the filter is a simple process, and it will help your furnace run more efficiently. If you have never replaced one before, you will be...
  2. General HVAC Discussion
    I'm currently working on a commerical construction project with the government and we have a potential issue that we are trying to resolve. The issue that we have is the angle at which the return air transitions/connects back with our HVAC unit. The mechanical engineer from the Corp of Engineers...
  3. Residential HVAC Forum
    Hello, I posted this in another location on this forum and got no replies. I think I may have posted it in the wrong section. I hope its ok that I reposted here. I am an AC contractor. I did a change out on an apartment complex of some air handlers (dx open case, twin squirl cage, ceiling...
  4. General HVAC Discussion
    Hello, I am an AC contractor. I did a change out on an apartment complex of some air handlers (dx open case, twin squirl cage, ceiling mount, hide-a-way type.) The air handlers have electric heat strips with a r22 evap/coil w/ txv's. When winter began I got numerous complaints of no heat...
  5. New Member Introductions
    Hello folks, Johnny Pappas here with Spartan Heating & Air from Ocala, Florida. Looking forward to getting to know you.
  6. HVAC Codes and Certifications
    I am trying to install a Rinnai air handler system, tied to a Rinnai demand water heater. The Maine state plumbing board is denying this system because of the supposed comingling of DHW and boiler water. I understand this is an issue in Mass. as well. Does anyone have a work around idea...
  7. Commercial HVAC Forum
    Hi Guys Was checking out this panasonic ceiling cassette and it displayed a 'f4' error code,the model number is CZ 06KPV 21P.Please help me
  8. HVAC Tools and Equipment
    Recently patented a tool and process which allows a user (residential and commercial) to change an air filter located in the ceiling without a ladder. For the last time a ladder is needed to convert the filter grill (no other tools needed), after this it only takes 20 seconds to change the...
  9. New Member Introductions
    For the last 4 years I have been working on and patented a tool which allows a user (residential and commercial) to change an air filter located in the ceiling without the need of a ladder (20 seconds or less). A video can be seen at 123inventions.com page 14 under Contact Robert. This tool is...
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