hi bob, i just installed a 14 x 24 foot room addition. the original sq footage is 1700. which is heated by a janitrol 100-4 furnace. the supply duct is 8x16 with 6" heat runs to floor registers. in order to install heat to the new addition i ran a 8x12 main duct teed off the 8x16 duct. i don't seem to get enough air to the new registers. my question is would it be ok to step up the speed on the blower. thank you for your help. p.s. enjoy your show. don g
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