do i need a third-party HVAC designer to review the calculations done by my HVAC contractor?
Hi. We are building a one-story all-brick home in CZ 2 that we are hoping to be a “tight home”. We chose Zip R3 sheathing and Zip roof deck, with open-cell spray foam cavity wall insulation and under the roof deck to achieve a conditioned attic. For mechanicals we are going with a variable speed unit with a dehumidifier and an ERV. This is an all-electric home as well.
We found our HVAC contractor through the Mitsubishi website of certified contractors with their designated “badge” that assures customers of their expertise and received training. We do like our HVAC contractor but wondering if we should still shell out some budget to have a third-party HVAC designer review our HVAC guy’s calculations (manual J, S, T, D, etc)? Just for peace of mind, as I understand when we are trying to build a tighter home that the HVAC performance is very critical to making it all work and hopefully lessen the chances of mold issues and such. We have been having so much more expenses due to increase in prices left and right with every trade that it’s eating into our contingency, but then if this is a critical step to ensure good indoor air quality and comfort we will probably take that step. Thanks in advance.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part