I am having a difficult time finding a designer/installer of HRV and ERV systems for residential applications. I am in central NH. An energy audit on my home shows what I thought - my home is too tight and I need a whole house ventilation system. I use outside combustion air for my oil fired boiler with FHW radiant floor and baseboard heat. I do not have any duct work in place so this complicates it somewhat. Has anyone done this themselves? I have been advised (based on ASHRAE 62.2) that I need 52.8 CFM ventilation rate.

Any ideas would be helpful.