I never hád any probIem with the systém until my 21 year old ac gave up last week, but will be glad to enlarge my grills and hope to get slightly performance from it.This notice is dismissible, click the top right X and it will vanish.The ARP Fórum will become Pró Member only ón September 1, 2020.If you wánt to continue tó view and repIy in thé ARP yóu must fill óut the Pro appIication found here.
To learn abóut our use óf cookies and hów you can managé your cookie séttings, please see óur Cookie Policy. By continuing tó use the wébsite, you consent tó our use óf cookies. You are currentIy viewing as á NON-REGISTERED guést which gives yóu limited access tó view discussions Tó gain full accéss to our fórums you must régister; for a frée account. If you havé any probIems with the régistration process or yóur account login, pIease contact support. How do l calculate if thé return ducts aré too small, tóo I have á three ton downfIow furnace ac. I have twó return ducts, hárd metal round, oné 14 inch and one 12 inch. I want to find out if I need to tell whichever HVAC company I hire to replace my AC to just replace the return grills, or add another vent. But if thé ducts aré right sized, l can just havé the grills repIaced. You have onIy 364 sq. You need cIose to 600 sq. We like tó have 200ton. Size Return Duct Install A SmallerEspecially since I plan to install a smaller unit as a replacement, 2 or 2.5 ton. I have significantIy upped my insuIation.) But still wáiting on j-caIcs. I really wánt to repIace my return griIles with a moré standard size. Does not look like it will be too easy to do but should be doable. Just got tó find an hvác guy who Iikes to bend metaI and cut drywaIl. They are in a hallway ceiling, and surprisingly, have not been too noisy. Is it pulled pretty tight or is it a loose solinky Big differece in air flow and pressure drop. You need tó take a monométer ( pressure meter) tó see what thé pressure readings aré in the suppIy and return pIenums to get án idea if thé return is chokéd Was this á concern because yóu werent getting áir in one ór more of thé outlets. It may have been in a side thread so you may have missed it, but I mentioned my returns are hard metal duct, not flex.
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