Fenestration testing laboratory located in York, PA (HQ), Everett, WA and Orlando, FL. In-house testing of windows, doors, skylights and curtain walls. Field testing including curtain wall installations. Approved laboratory for NFRC thermal, simulations and CMA, AAMA accredited, IGCC/IGMA, SGCC, Miami-Dade and Florida Product Approval. ISO/ IEC 17025 accredited.