Hot tubs and spas in Nashua follow the 2021 ISPSC adopted under NRO Sec. 105-25 (per RSA 155-A). Under ISPSC Section 305.7, spas and hot tubs equipped with a safety cover that complies with ASTM F1346 are exempt from the barrier provisions of Section 305 (the 48-inch fence requirement). A building permit through the Department of Building Safety is required for installation; electrical permits per NRO Sec. 105-22.C apply. Public spas (e.g., commercial, hotel, or HOA spas serving 15+ dwellings) are additionally regulated by NH DES under RSA 485-A:26 and Env-Wq 1100 per NRO Sec. 105-26.B.
ISPSC 2021 Section 305.7 (Spa and hot tub barriers) provides: 'A safety cover that is listed and labeled in accordance with ASTM F1346 shall be provided for spas or hot tubs.' This is the critical distinction from in-ground pools: a hot tub or spa with a listed ASTM F1346 safety cover does not require a separate 48-inch perimeter barrier. Without a compliant cover, the spa/hot tub must be enclosed by a Section 305.2 barrier. NRO Sec. 105-25 adopts the ISPSC: 'A certain document and referenced code on file in the Department of Building Safety of the City of Nashua, New Hampshire, being marked and designated as the International Swimming Pool and Spa Code adopted as per the New Hampshire State Building Code per RSA 155-A.' NRO Sec. 105-26.B adds: '101.1.1 Public Swimming Pools and Spas shall also be regulated by NH DES Public Pool and Spa Program in accordance with RSA 485-A:26 and Env-Wq 1100 Public Bathing Place.' Electrical bonding for hot tubs/spas must comply with NEC Article 680 (NFPA 70, 2023 edition, as adopted under RSA 155-A and NRO Sec. 105-19). Department of Building Safety permits are issued at 229 Main Street, 2nd Floor; phone 603-589-3080.
Installing a hot tub or spa without an ASTM F1346-compliant safety cover and without a 48-inch barrier meeting ISPSC Sec. 305.2 violates the adopted ISPSC and NRO Sec. 105-25. Installing without the required electrical permit (NRO Sec. 105-22.C) is a code violation subject to a 100% surcharge under NRO Sec. 105-22.A.(14). Operating a public spa without compliance with NH DES Env-Wq 1100 and RSA 485-A:26 violates NRO Sec. 105-26.B. Penalties under NRO Chapter 74 and RSA 676:15-17-b apply per NRO Sec. 105-6.
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