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Welcome to HVAC-Talk.com, a non-DIY site and the ultimate Source for HVAC Information & Knowledge Sharing for the industry professional! Here you can join over 150,000 HVAC Professionals & enthusiasts from around the world discussing all things related to HVAC/R. You are currently viewing as a NON-REGISTERED guest which gives you limited access to view discussions To gain full access to our forums you must register; for a free account. As a registered Guest you will be able to: Participate in over 40 different forums and search/browse from nearly 3 million posts. Advice Sought for a High Performance New Construction in Houston My wife and I are in the early phases of designing a new house in Houston. We have started working with an Architect, and we hope to engage a builder here soon. I've spent about three years reading and getting educated on building practices and energy efficiency (e.g., I have read a lot of what Joe Lstirubek has written), and I would appreciate getting some advice from the Pros here before we get too much farther along with the design and to help educate me about how to know when I've got a great HVAC contractor vs. when I've got someone who knows enough to put the right words on the bid, but whose team does the same-old-thing when it comes down to installation. Lots of glass, and, unfortunately, a lot of it West-facing (SHGC will be <0.25 for these, hopefully <0.20) due to lot orientation and building setbacks. ~3,000sf on 2 levels - public spaces downstairs, private spaces upstairs. We will most likely want at least 4 zones. We will probably have a high reflectivity and high emissivity roof, but that is probably for a different discussion (e.g., energy savings vs. damage resistance/durability vs. lifecycle costs) DHW will most likely be gas - either tankless or something like an AO Smith Vertex 100 Man J and Man D will be a must. We will have a big challenge with heat gain from the western afternoon summer sun (overhangs only go so far and no trees on that side yet), but the rest of the day should be fairly moderate. As I understand it, we will have two basic paths to consider for HVAC, each with advantages and disadvantages: Air Conditioner and Gas Furnace Heat Pump (little need for 'emergency' heat given the market and our climate) The Air Conditioner + Furnace option will be standard construction for a lot of Houston homes, so it should be relatively cheap. However, the gas furnace isn't free, so the heat pump might have all-in costs that are lower, plus a heat pump saves me a roof/wall penetration. Further complicating the picture is the need for dehumidification and fresh air intake. We can go with an ERV or a damper for the air exchange, but the more interesting question (to me) is whether a VRF or other continuously variable system will eliminate the need for a dedicated dehumidifier, or whether we