Recent Q&A

• Life-cycle costs of air-source heat pumps?

  We have installed individual and central (VRF) heat pump systems in several of our affordable housing projects (multi family). I would like to be able to develop a replacement reserve…

• Does a rainscreen assembly maintain the exterior surface of paint?

  I am trying to argue for a rain screen assembly. Is there any evidence that would highlight extending the time between painting the exterior siding by using a rain screen?

• Vinyl siding over rigid insulation

  我有一个多的家庭需要的项目be resided. Unfortunately we cannot afford to use cement board siding and are using vinyl. Is it possible to attach vinyl…

• Ventilating Stairways in Multifamily Buildings on the Cape

  I am renovating a five building development in Orleans, MA that includes a new envelope (windows, added insulation on the exterior and new siding). I am also planning to add…

• Split, Mini-split, or Air-Source Heat Pump?

  I am leaning towards mini-splits for a 30 unit 3 story affordable apartment building in Chicago but have been told that the cost of electricity makes that a bad choice.…

• New Heating and Hot Water

  I want to get rid of my very inefficent electric hot water and heat. Would you reccomend a propane gas furnace with indirect HW heater with a solar thermal preheat?…